Relevant bibliographies by topics / Structural failures – Investigation

Academic literature on the topic 'Structural failures – Investigation'

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Published: 10 December 2022
Last updated: 28 January 2023

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Journal articles on the topic "Structural failures – Investigation"

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Barone, Pier, and Rosa Di Maggio. "Forensic Investigations of Geohazards: The Norcia 2016 Earthquake." Geosciences 8, no. 9 (August 23, 2018): 316. http://dx.doi.org/10.3390/geosciences8090316.

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Earthquakes represent one of the world’s most significant hazards in terms of damage to human and animal life, and property. Earthquakes also cause many other related fatalities and damage to urban structures. This paper presents the forensic investigation of failures induced by the Norcia 2016 earthquake in Italy. The detailed geophysical field investigations were carried out at selected locations in two cities: Rome and Amelia. The places of investigation were 150 km and 90 km, respectively, from the epicenter. A ground penetrating radar (GPR) survey was carried out at the sites to highlight structural failures, and included a partially damaged urban bridge, and the cracked wall of a private house. These failures have been discussed with reference to the field measurements carried out. In both cases, the GPR radargram showed clear lesions along with their geometry and location. This forensic geoscientific analysis highlights the importance of detecting structural damage immediately after a geohazard event to help plan proper interventions, efforts to prevent human losses and help law enforcement to focus their forensic investigations.
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Zhang, Weihua, Pingbo Wu, Xuejie Wu, and Jing Zeng. "An investigation into structural failures of Chinese high-speed trains." Engineering Failure Analysis 13, no. 3 (April 2006): 427–41. http://dx.doi.org/10.1016/j.engfailanal.2004.12.037.

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Chhetri, Sandip, Rachel A. Chicchi, and Andrew E. N. Osborn. "Experimental investigation of 0.6 in. diameter strand lifting loops." PCI Journal 66, no. 2 (2021): 71–87. http://dx.doi.org/10.15554/pcij66.2-03.

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Very little experimental data have been published relating to the pullout capacity of prestressing strand lifting loops. To address this gap in knowledge, 13 pullout tests were conducted on strand lifting loops with 0.6 in. (15.24 mm) diameter, 270 ksi (1860 MPa) strand. Straight and bent orientations were tested for single loops at different embedment depths. Loops were embedded in 12 in. (304.8 mm) wide and 44 in. (1117.6 mm) deep concrete blocks and subjected to monotonic, static loading until failure. Marginal bond quality of the strand (18.2 kip [81 kN]), Mohs hardness (3.6), and concrete strength (3000 psi [20.7 MPa]) resulted in an average bond stress value of 400 psi (2758 kPa) at failure. Most tests exhibited pullout failure modes and adequate ductility. Three loops tested at 32 in. (812.8 mm) embedment with 6 in. (152.4 mm), 90-degree bends experienced brittle side-face blowout failures. These failures were due to inclination of the lifting, which led to a reduced edge distance. A safe uniform bond stress of 199 psi (1372 kPa) is recommended for 0.6 in. diameter strand.
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Liu, Yi-Fen, and I.-Ling Ling. "Keep fighting or give up? An investigation of consumer regret over repetitive failures in weight loss services." Journal of Services Marketing 36, no. 1 (November 29, 2021): 29–43. http://dx.doi.org/10.1108/jsm-12-2020-0499.

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Purpose Weight loss services feature high consumer involvement that is sometimes marked by repetitive failures. These features can affect regret and its associated factors differently from the way that discrete failure can. The purpose of this study is to investigate consumer regret over repetitive failures in weight loss services as well as its antecedents (overeating and insufficient exercise), consequences (rumination and reflection) and moderators (failure experiences and required effort). This study also investigates how rumination and reflection affect persistence intention. Design/methodology/approach A total of 318 samples were collected through three surveys, one of which contained a scenario, provided to consumers who experienced repetitive failures in weight loss. The proposed relationships were tested using structural equation modeling, dominance analysis and PROCESS modeling. Findings The results of this study reveal that overeating contributes to regret more saliently than does insufficient exercise. The effect of regret on rumination (thoughts about continuing to blame oneself and giving up the pursuit of goals) is stronger than on reflection (thoughts about learning from prior failures and willingness to try again), and greater reflection results in higher persistence intention. Moreover, the effect of insufficient exercise on regret and the effect of regret on rumination are augmented with cumulative failure experiences, whereas required effort enhances the impact of regret on reflection. Originality/value This study is the first to focus on regret over repetitive failures in weight loss. It advances the literature by clarifying the antecedents and consequences of regret, showing how failure experiences influence the relationships between regret and its associated factors as well as identifying interventions that benefit from regret.
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Rao, V. Bhujanga, R. Rajendran, A. V. Jaykumar, and K. H. B. S. Satyanarayana. "Metallurgical Investigation of HSLA Steel Subjected to Underwater Explosion." Shock and Vibration 1, no. 4 (1994): 385–94. http://dx.doi.org/10.1155/1994/375854.

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The metallurgical behaviour of HSLA steel subjected to underwater explosion is of prime importance because of its structural applications in underwater vehicles. HSLA steel plates 300 × 250 × 4 mm were subjected to single and repetitive shock loadings and the point of rupture was identified. Test plates exhibited mode-I (large ductile deformation) and mode-II (tensile tearing) macroscopic failures. Electron micrographic and fractographic examination showed that the initiation of fracture was due to adiabatic shearing and the microscopic mode of failure was ductile. Plates subjected to single shock showed an increase in residual hardness and at the point of rupture it was approximately one-third higher than the initial residual hardness.
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Halvoník, Jaroslav, and Lucia Majtanová. "Experimental Investigation of the Maximum Punching Resistance of Slab-Column Connections." Slovak Journal of Civil Engineering 26, no. 3 (September 1, 2018): 22–28. http://dx.doi.org/10.2478/sjce-2018-0017.

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Abstract Flat slabs represent a structural system with a typical concentration of shear forces near the vicinity of its local supports. A possible failure from punching is a dangerous phenomenon due to the brittleness and possible progressive collapse of a whole structure. An improvement in the structural behaviour of a slab-column connection provides transverse reinforcement. The amount of this reinforcement and thus its contribution to the resistance against punching has a limit, which is represented by the maximum punching capacity. This capacity can be assessed using the kmax factor or by direct verification of the strut capacity. The article deals with the results of a test campaign carried out on flat slab specimens with their transverse reinforcements designed in such a way that the crushing of the struts is the governing mode of any failure. The test results obtained allowed for an evaluation of the kmax factors and provide an answer as to whether it is possible to cover failures due to the crushing of struts by this factor.
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Pavlov, Alexander Nikolaevich. "Investigation of structural reliability of P-networks with independent and dependent elements failures." SPIIRAS Proceedings, no. 11 (March 17, 2014): 81. http://dx.doi.org/10.15622/sp.11.4.

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Bagbanci, M. Bilal. "Investigation of installation systems and structural failures of Ottoman baths in Bursa, Turkey." International Journal of Academic Research 5, no. 3 (May 28, 2013): 213–18. http://dx.doi.org/10.7813/2075-4124.2013/5-3/a.30.

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Hou, Yongdan, Lemuel Gbologah, Derrick Boateng Asante, and Parpah Senanu Kwawukume. "Compositional and Structural Deficiencies Causing Failure of Local Fire Assaying Crucibles in Ghana." International Journal of Engineering Research in Africa 51 (November 2020): 57–70. http://dx.doi.org/10.4028/www.scientific.net/jera.51.57.

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Locally produced crucibles in Ghana experience dimensional failures during fire assaying of ores, therefore, even with a higher cost, imported crucibles are still the most preferred choice by laboratories in Ghana because of the stable performance of up to three cycles. Assay crucibles of locally manufactured, imported and theoretically composed were sampled and analysed via reverse engineering to identify factors that are attributed to the failure during use. Field investigation and compositional, physical and structural investigations were carried out using XRD, water boiling and SEM-EDS analyses, respectively. The results indicated that failure of the local crucible can be attributed to low mullite phase in both content and planes, which could ease the crack development and enhance the thermal stability of the crucible; non converted quartz into cristobalite, which stabilises the volume expansion coefficient during the fire assaying cycles; excess quartz content and absence of alumina content weakened the corrosion resistance against attack from the basic flux of litharge; and high porosity, allowed penetration of molten charge into the structure of crucible, leading to the dissolution of free silica content into the charge and causing structural failure. To overcome such deficiencies, higher firing temperature (~1240 °C), extra soaking time, and blending of high alumina contained clay/minerals were suggested.
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Debnath, Jhuma, Ajay Kumar, and Hrishikesh Sharma. "Numerical investigation of Reinforced-concrete beam-column joints under contact and close-in blast application." Proceedings of the 12th Structural Engineering Convention, SEC 2022: Themes 1-2 1, no. 1 (December 19, 2022): 1203–8. http://dx.doi.org/10.38208/acp.v1.641.

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The behavior of the concrete and the steel material under blast loads are different. They have different mode of failures under blast loads. Also, responses differ according to the blast types concerning the proximity of the charge kept. It causes different failure modes in the structural members. Close-in or contact blast causes the spallation of concrete. In the near-field blasts, it causes bending failure in the structural members. The behavior of the mode of failure of various joint types subjected to contact-blast and close-in blast loads are numerically studied here. Three different joints simulated to carry on blast loads—exterior beam-column joint, interior beam-column joint, and knee joint simulated numerically under the close-in and contact loads. The charge for the contact blasts were applied to the joint is placed in contact with the joint core, and was not put at the beam or the column member of the joint cut section. In the current work, the failure behavior and the response of the RC beam-column joints is concluded.
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Dissertations / Theses on the topic "Structural failures – Investigation"

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Nacewicz, Rebecca Marie. "Investigation of fire impact on structural steel through case studies." Link to electronic thesis, 2006. http://www.wpi.edu/Pubs/ETD/Available/etd-050406-105306/.

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Santafe, Iribarren Berta. "Progressive collapse simulation of reinforced concrete structures: influence of design and material parameters and investigation of the strain rate effects." Doctoral thesis, Universite Libre de Bruxelles, 2011. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/209912.

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This doctoral research work focuses on the simulation of progressive collapse of reinforced concrete structures. It aims at contributing to the ‘alternate load path’ design approach suggested by the General Services Administration (GSA) and the Department of Defense (DoD) of the United States, by providing a detailed yet flexible numerical modelling tool.

The finite element formulation adopted here is based on a multilevel approach where the response at the structural level is naturally deduced from the behaviour of the constituents (concrete and steel) at the material level. One-dimensional nonlinear constitutive laws are used to model the material response of concrete and steel. These constitutive equations are introduced in a layered beam approach, where the cross-sections of the structural members are discretised through a finite number of layers. This modelling strategy allows deriving physically motivated relationships between generalised stresses and strains at the sectional level. Additionally, a gradual sectional strength degradation can be obtained as a consequence of the progressive failure of the constitutive layers. This means that complex nonlinear sectional responses exhibiting softening can be obtained even for simplified one dimensional constitutive laws for the constituents.

This numerical formulation is used in dynamic progressive collapse simulations to study the structural response of a multi-storey planar frame subject to a sudden column loss. The versatility of the proposed methodology allows assessing the influence of the main material and design parameters in the structural failure. Furthermore, the effect of particular modelling options of the progressive collapse simulation technique, such as the column removal time or the strategy adopted for the structural verification, can be evaluated.

The potential strain rate effects on the structural response of reinforced concrete frames are also investigated. To this end, a strain rate dependent material formulation is developed, where the rate effects are introduced in both the concrete and steel constitutive response. These effects are incorporated at the structural level through the multilayered beam approach. In order to assess the degree of rate dependence in progressive collapse, the results of rate dependent simulations are presented and compared to those obtained via the rate independent approach. The influence of certain parameters on the rate dependent structural failure is also studied.

The differences obtained in terms of progressive failure degree for the considered parametric variations and modelling options are analysed and discussed. The parameters observed to have a major influence on the structural response in a progressive collapse scenario are the ductility of the steel bars, the degree of symmetry and/or continuity of the reinforcement and the column removal time. The results also depend on the strategy considered (GSA vs DoD). The strain rate effects are confirmed to play a significant role in the failure pattern. Based on these observations, general recommendations for the design of progressive collapse resisting structures are finally derived.

L’effondrement progressif est un sujet de recherche qui a connu un grand développement suite aux événements désastreux qui se sont produits au cours des dernières décennies. Ce phénomène est déclenché par la défaillance soudaine d’un nombre réduit d’éléments porteurs de la structure, qui provoque une propagation en cascade de l’endommagement d’élément en élément jusqu’à affecter une partie importante, voire la totalité de l’ouvrage. Le résultat est donc disproportionné par rapport à la cause. La plupart des codes de construction ont inclus des prescriptions pour le dimensionnement des structures face aux actions accidentelles. Malheureusement, ces procédures se limitent à fournir des ‘règles de bonne pratique’, ou proposent des calculs simplifiés se caractérisant par un manque de détail pour permettre leur mise en oeuvre.

Cette thèse de doctorat intitulée Simulation de l’Effondrement Progressif des Structures en Béton Armé: Influence des Paramètres Materiaux et de Dimensionnement et Investigation des Effets de Vitesse a pour but de contribuer à la simulation numérique de l’effondrement progressif des structures en béton armé. Une formulation aux éléments finis basée sur une approche multi-échelles a été développée, où la réponse à l’échelle structurale est déduite à partir de la réponse au niveau matériel des constituants (le béton et l’acier). Les sections des éléments structuraux sont divisées en un nombre fini de couches pour lesquelles des lois constitutives unidimensionnelles sont postulées. Cet outil permet une dégradation graduelle de la résistance des sections en béton armé suite à la rupture progressive des couches. Des comportements complexes au niveau des points de Gauss peuvent être ainsi obtenus, et cela même à partir de lois unidimensionnelles pour les constituants.

Cette formulation est utilisée pour la simulation de l’effondrement progressif d’ossatures 2D, avec prise en compte des effets dynamiques. La versatilité de la présente stratégie numérique permet d’analyser l’influence de différents paramètres matériaux et de dimensionnement, ainsi que d’autres paramètres de modélisation, sur la réponse structurale face à la disparition soudaine d’une colonne.

Les effets de la vitesse de déformation sur le comportement des matériaux constituants est aussi un sujet d’attention dans ce travail de recherche. Des lois constitutives prenant en compte ces effets sont postulées et incorporées au niveau structural grâce à l’approche multi-couches. Le but est d’étudier l’influence des effets de la vitesse de chargement sur la réponse structurale face à la disparition d’un élément porteur. Les resultats obtenus à l’aide de cette approche avec effets de vitesse sont comparés à ceux obtenus avec des lois indépendantes de la vitesse.

Les différences dans la réponse à la disparition d’une colonne sont analysées pour les variations paramétriques étudiées. Les paramètres ayant une influence importante sont notamment: la ductilité des matériaux constituants et la disposition et/ou la symétrie des armatures. Les effets de vitesse sont également significatifs. Sur base de ces résultats, des recommandations sont proposées pour le dimensionnement et/ou l’analyse des structures face à l’effondrement progressif.


Doctorat en Sciences de l'ingénieur
info:eu-repo/semantics/nonPublished

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Kim, Zeen Chul. "An investigation of methodology for the control and failure identification of flexible structures." Diss., Virginia Polytechnic Institute and State University, 1986. http://hdl.handle.net/10919/49811.

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Akhtar, Mohammad Farhan. "Numerical Investigation of High Strength Structural Steel Gravity Columns at Elevated Temperature." University of Cincinnati / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1613748386003217.

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Lee, Kok Kuen. "Investigation of potential spudcan punch-through failure on sand overlying clay soils." University of Western Australia. School of Civil and Resource Engineering, 2009. http://theses.library.uwa.edu.au/adt-WU2009.0212.

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When a jack-up foundation is installed on seabeds consisting of a sand layer overlying soft clay, potential for 'punch-through' failure exists. This happens due to an abrupt reduction in bearing resistance when the foundation punches a block of sand into the underlying soft clay in an uncontrolled manner. This can lead to a sudden large penetration that can cause temporary decommissioning and even toppling of the unit. This research has addressed this problem with the aim of developing a practical design method for the jack-up industry to assess potential punch-through hazards. This objective has been achieved with the successful development of a new conceptual model for predicting the peak penetration resistance and a consistent method for constructing a complete resistance profile of spudcan foundations penetrating through sand into the underlying clay. The analytical basis of the new conceptual model follows the approach for silo analysis, and takes into account the stress level and dilatant response of sand. It is therefore a significant improvement over the punching shear and load spread models recommended in the current industry guidelines SNAME (2002), which do not consider the strength properties of the sand. To provide relevant experimental data for the new model, an extensive series of 30 continuous penetration tests were performed using the UWA drum centrifuge. These experimental results were retrospectively simulated using finite element (FE) analysis, in order to back-calculate the stress-level dependent friction and dilation angles in the sand during peak penetration resistance. The back-analysis showed that larger values of peak resistance gave lower friction and dilation angles, which is consistent with gradual suppression of dilatancy under high confining stress. When compared to published results from visualisation experiments, the FE analysis showed a similar failure mechanism during peak resistance, where a frustum of sand was forced into the underlying clay, with the outer angle reflecting the dilation in the sand. This has formed the basis of the new conceptual model. The performance of the new model in predicting the experimental peak resistance was compared with other existing analytical methods. Additional experimental results, including those already in the literature, were incorporated in the comparative study. It was found that the new conceptual model generally gave a good prediction of the experimental values, while the prediction from SNAME (2002) was conservative, with the predicted values being about half the experimental results on average. It was also shown that the new model could be modified to predict the post-peak penetration resistance in the sand layer. Finally, an analytical method for predicting the resistance profiles in the underlying clay was devised based on new bearing capacity factors developed through FE analysis. By joining the values of peak resistance, post-peak resistance and the resistance profile in the underlying clay, a complete simplified penetration resistance profile for spudcan foundations in sand overlying clay can be generated. The predicted profiles were shown to match the experimental results well.
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Hargreaves, A. E. "An investigation of the premature failure of bituminous macadam wearing courses with particular reference to the effects of moisture and aggregate quality." Thesis, University of Hertfordshire, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.377560.

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Kunc, Vojtěch. "Operativní diagnostika při regeneraci bytového domu." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2013. http://www.nusl.cz/ntk/nusl-225734.

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Essay is devoted to assessment of the existing structure. Primarily is focused on the buildings history, performed structures upgrades, design of structural plans and design process to improve remaining working life of the building.
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Kettermann, Michael [Verfasser], Janos [Akademischer Betreuer] Urai, Klaus [Akademischer Betreuer] Reicherter, and Peter [Akademischer Betreuer] Vrolijk. "Failure Modes in Normal Faults - an investigation into structure and permeability evolution in physical models and outcrop studies / Michael Kettermann ; Janos Urai, Klaus Reicherter, Peter Vrolijk." Aachen : Universitätsbibliothek der RWTH Aachen, 2016. http://d-nb.info/1162499109/34.

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Jin, Zhuang. "Numerical investigation of caisson foundations in sand under combined monotonic loadings for offshore wind turbines." Thesis, Ecole centrale de Nantes, 2019. http://www.theses.fr/2019ECDN0002/document.

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Cette thèse de doctorat porte sur la réponse des fondations caisson dans du sable pour les éoliennes en mer soumises à des chargements monotones et cycliques combinés. Le processus de défaillance et l’enveloppe de rupture (diagramme de capacité portante) d’une fondation en caisson dans du sable soumise à des chargements monotones combinés sont premièrement étudiés à l’aide du modèle constitutif de Mohr-Coulomb. La méthode Lagrangian-Smoothed Particle Hydrodynamics Combinée (CLSPH) est adoptée pour prendre en compte les grandes déformations et les limites de l'approche sont mises en évidence. Une loi constitutive basée sur la notion de l’état critique pour le sable récemment mis au point (SIMSAND) est ensuite introduite et utilisée avec la méthode CLSPH. Des tests d’effondrement du sol dans un canal rectangulaire et d’une colonne granulaire en prenant en compte différentes géométries sont simulés afin de valider l’approche en termes de morphologie de dépôt final, des profils d’écoulement et de zones non perturbées. La méthode CLSPH et le modèle SIMSAND sont ensuite utilisés pour étudier le diagramme de capacité portante des fondations caisson dans du sable. Différents paramètres ayant une incidence sur la forme et la taille de l'enveloppe de rupture sont pris en compte, tels que la densité et la rigidité du sol, la résistance au frottement, la rupture des grains, la géométrie et les dimensions de la fondation. Une formule analytique est introduite pour décrire la surface de rupture 3D capable à reproduire les résultats numériques. Sur la base de la formule analytique proposée, un macro-élément pour des fondations caisson dans du sable soumises à des chargements monotones et cycliques est finalement développé dans le cadre de l'hypoplasticité. L’outil numérique proposé est validé avec des résultats expérimentaux
This PhD thesis deals with the response of caisson foundations in sand for offshore wind turbines submitted to combined monotonic and cyclic loadings. First, the failure process and failure envelope (or bearing capacity diagram) of a caisson foundation in sand under combined monotonic loadings is investigated using the conventional Mohr-Coulomb constitutive model. A Combined Lagrangian-Smoothed Particle Hydrodynamics(CLSPH) method is adopted to consider large deformations and the limitations of the approach are highlighted. A recently developed critical state model for sand (SIMSAND) is then introduced and combined with the CLSPH method. Rectangular channel soil collapse tests and granular column collapse tests considering different aspect ratios are simulated to validate the approach in terms of final deposit morphologies, flow profiles and undisturbed areas.The CLSPH method and the SIMSAND model are then used to investigate the bearing capacity diagram of the caisson foundation in sand. Different parameters affecting the shape and size of the failure envelope are considered, as soil density and stiffness, friction strength, grain breakage, geometry and aspect ratio of the foundation. An analytical formula is introduced to describe the 3D failure surface reproducing the numerical results. Based on the proposed analytical formula, a macro-element for the caisson foundation in sand submitted to monotonic and cyclic loadings is finally developed within the framework of hypoplasticity. Validation is provided through comparison with experimental results
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Penn, Zoe Jillian. "A prospective randomised multicentre trial to compare elective versus selective caesarian section for the preterm infant in breech presentation : and a structured investigation into the possible reasons for presentation failure to recruit into this trial." Thesis, Imperial College London, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.264185.

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Books on the topic "Structural failures – Investigation"

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Technical Council on Forensic Engineering (American Society of Civil Engineers). Task Committee on Guidelines for Failure Investigation. Guidelines for failure investigation. New York, N.Y: American Society of Civil Engineers, 1989.

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T, Ratay Robert, ed. Forensic structural engineering handbook. New York: McGraw-Hill, 2000.

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1947-, Alonso Eduardo E., and Pinyol, N. M. (Núria M.), eds. Geomechanics of failures. Dordrecht: Springer, 2010.

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ASCE Research Council on Performance of Structures. and United States. Federal Highway Administration., eds. Guide to investigation of structural failures, with editorial revisions incorporated. New York, N.Y: American Society of Civil Engineers, 1986.

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Matthews, Clifford. A practical guide to engineering failure investigation. London: Professional Engineering Publishing Limited, 1998.

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Levy, Matthys. World Trade Center structural engineering investigation. New York, NY (375 Hudson St., New York): Hart-Weidlinger, 2002.

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Forensic Engineering Congress (4th 2006 Cleveland, Ohio). Forensic engineering: Proceedings of the 4th congress, October 6-9, 2006, Cleveland, Ohio. Reston, Va: American Society of Civil Engineers, 2007.

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Forensic, Engineering Congress (5th 2009 Washington D. C. ). Forensic engineering 2009: Pathology of the built environment : proceedings of the Fifth Congress on Forensic Engineering, November 11-14, 2009, Washington, D.C. Reston, Va: American Society of Civil Engineers, 2010.

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Institution of Civil Engineers (Great Britain), ed. Forensic engineering: From failure to understanding : proceedings of the two day international conference organised by the Institution of Civil Engineers and held in London on 2 to 4 December 2008. London: Thomas Telford, 2009.

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John, Carpenter, and Institution of Civil Engineers (Great Britain), eds. Forensic engineering: Informing the future with lessons from the past : proceedings of the fifth International Conference on Forensic Engineering. London: Institution of Civil Engineers Publishing, 2013.

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Book chapters on the topic "Structural failures – Investigation"

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Battaini, M., and S. J. Dyke. "Experimental investigation of sensor failure in structural control." In Active Control in Mechanical Engineering, 273–84. London: CRC Press, 2021. http://dx.doi.org/10.1201/9781003211204-29.

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Vasovic Maksimovic, Ivana, Mirko Maksimovic, and Katarina Maksimovic. "Stability and Initial Failure Analysis of Layered Composite Structures." In Experimental and Computational Investigations in Engineering, 130–46. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-58362-0_9.

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Labeas, G. N., and M. M. Sunaric. "Failure Behaviour Investigation of Metallic Open Lattice Cellular Structures." In Experimental Analysis of Nano and Engineering Materials and Structures, 775–76. Dordrecht: Springer Netherlands, 2007. http://dx.doi.org/10.1007/978-1-4020-6239-1_385.

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Hachemi, A., F. Schwabe, and D. Weichert. "Failure Investigation of Fiber-Reinforced Composite Materials by Shakedown Analysis." In Inelastic Analysis of Structures under Variable Loads, 107–19. Dordrecht: Springer Netherlands, 2000. http://dx.doi.org/10.1007/978-94-010-9421-4_7.

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Xu, L. Roy, and Ares J. Rosakis. "Real-Time Experimental Investigation on Dynamic Failure of Sandwich Structures and Layered Materials." In Major Accomplishments in Composite Materials and Sandwich Structures, 571–603. Dordrecht: Springer Netherlands, 2009. http://dx.doi.org/10.1007/978-90-481-3141-9_22.

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Wang, W., G. Martakos, J. M. Dulieu-Barton, and O. T. Thomsen. "Experimental and Numerical Investigation of Novel Crack Stopper Concepts for Lightweight Foam Cored Sandwich Structures." In Fracture, Fatigue, Failure and Damage Evolution, Volume 8, 107–10. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-42195-7_15.

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Seibel, Wolfgang. "Erosion of Professional Integrity: The Collapse of the Canterbury TV Building in Christchurch on 22 February 2011." In Collapsing Structures and Public Mismanagement, 87–128. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-67818-0_4.

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AbstractFrom 4 September 2010 on, a series of earthquakes shattered New Zealand for more than one year the most devastating of which caused the Canterbury TV (CTV) building in downtown Christchurch to collapse on 22 February 2011. One hundred and fifteen people were killed. A Royal Commission found out that, in 1986, the Christchurch City Council (CCC) had granted a building permit despite concerns about structural design issues. Moreover, the authority did not insist on structural analyses of the building after the initial earthquake of 4 September 2010. Thorough investigations after the disaster of 22 February 2011 revealed that the early concerns about insufficient joints between floors and shear walls had been entirely justified since the failure of the joints, according to all likelihood, had triggered the collapse of the building.
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Williamson, C., and J. Thatcher. "Investigation Into the Failure of Open Holes in Cfrp Laminates Under Biaxial Loading Conditions." In Experimental Analysis of Nano and Engineering Materials and Structures, 939–40. Dordrecht: Springer Netherlands, 2007. http://dx.doi.org/10.1007/978-1-4020-6239-1_467.

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Neuhaus, Selina, Henning Seibert, and Stefan Diebels. "Investigation of the Damage Behavior of Polyurethane in Stress Relaxation Experiments and Estimation of the Stress-at-Break σb with a Failure Envelope." In Advanced Structured Materials, 1–15. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-20801-1_1.

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Leveque, D., F. Laurin, A. Mavel, N. Carrere, J. M. Laborie, E. Goncalves-Novo, and S. Mahdi. "Investigation on failure mechanisms of composite structures subjected to 3D state of stresses." In Application of Imaging Techniques to Mechanics of Materials and Structures, Volume 4, 33–42. New York, NY: Springer New York, 2012. http://dx.doi.org/10.1007/978-1-4419-9796-8_6.

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Conference papers on the topic "Structural failures – Investigation"

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Colman, Jeremy C. "The Investigation of Structural Failures In Ships." In Learning From Marine Incidents 2. RINA, 2002. http://dx.doi.org/10.3940/rina.mi.2002.05.

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"Diagnostic Testing as a Tool in Investigation of Concrete Failures and their Prevention." In SP-285: Concrete Construction and Structural Evaluation: A Symposium Honoring Dov Kaminetzky. American Concrete Institute, 2012. http://dx.doi.org/10.14359/51683929.

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Peraza, David B. "Tropicana Garage Collapse." In IABSE Congress, New York, New York 2019: The Evolving Metropolis. Zurich, Switzerland: International Association for Bridge and Structural Engineering (IABSE), 2019. http://dx.doi.org/10.2749/newyork.2019.2172.

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<p>In 2003, a major collapse occurred during construction of a parking garage at the Tropicana Hotel in Atlantic City, New Jersey. It resulted in four fatalities, dozens of injured workers, and significant delays to the construction project. The legal matter was eventually settled out of court, reportedly for $100 million US dollars.</p><p>The author led the structural investigation into the collapse on behalf of the General Contractor. The investigation included numerous site visits, preservation of structural evidence, review of design drawings and contractor’s shop drawings, structural analyses, and litigation support.</p><p>The concrete parking garage was being constructed with a proprietary structural floor system, which involved “stay‐in‐place” precast concrete forms that became composite with the cast‐in‐place concrete slabs and wide beams.</p><p>The investigation presented significant challenges due to the intertwined design responsibilities for the system, the difficulty of preserving perishable evidence during the demolition of the unstable structure, the high‐profile nature of the collapse, and the diverse interests of the many involved parties.</p><p>The matter settled out of court, so the results of technical investigations and the lessons learned have not been widely disseminated previously.</p><p>This paper will describe the engineering investigation and findings, discuss the roles and responsibilities of the designers and others, and present recommendations to reduce future failures of similarly organized projects.</p>
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Dakov, Dimitar, Vasil Georgiev, and Raina Boiadjieva. "Failures of Steel Silos for Grain Storage - Fortuity or Underestimated Risk." In IABSE Congress, Nanjing 2022: Bridges and Structures: Connection, Integration and Harmonisation. Zurich, Switzerland: International Association for Bridge and Structural Engineering (IABSE), 2022. http://dx.doi.org/10.2749/nanjing.2022.1617.

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<p>The paper describes and investigates several cases of failures of silos made from corrugated thin steel sheets which were delivered and assembled in Bulgaria by foreign companies</p><p>Two main patterns of failures which occurred in different times of the year and at different locations in Bulgaria have been analyzed. The first failure pattern is related to collapses of conical roofs made from profiled trapezoidal steel sheetings while the second pattern involves fracture of cylindrical corrugated silo walls. On-site visual investigation of the failed silos and numerical analyses simulating the loading and stress state at the pre-failure situations have been performed.</p><p>Based on the lessons drawn from the investigated silo failures recommendations for improved structural design of the corrugated steel silos are proposed with the aim to avoid similar failure situations in the future.</p>
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I. Olayinka, A., M. A. Oladunjoye, O. O. Osinowo, and G. O. Adeyemi. "Integrated Geophysical Investigation to Determine Causes of Structural Failures at a Factory Site in Benin City, Nigeria." In 69th EAGE Conference and Exhibition incorporating SPE EUROPEC 2007. European Association of Geoscientists & Engineers, 2007. http://dx.doi.org/10.3997/2214-4609.201401587.

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Almeida, Pedro, Maruska L. S. Holanda, and Ronaldo O. Almeida. "The structural rehabilitation of the Costa e Silva bridge in Brasília, DF, Brazil." In IABSE Congress, Christchurch 2021: Resilient technologies for sustainable infrastructure. Zurich, Switzerland: International Association for Bridge and Structural Engineering (IABSE), 2021. http://dx.doi.org/10.2749/christchurch.2021.0638.

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<p>The structural rehabilitation of bridges is generally motivated by the premature aging of the structures and the increased daily traffic of vehicles. In the case of the Costa e Silva Bridge, the rehabilitation was conceived by the Federal District Government due to the partial collapse of the viaduct over the “Galeria dos Estados”, occurred in February 2018, with the same age and the same structural system and due to the relevance for Brasília's transportation system. Also, it was designed by the renowned architect Oscar Niemeyer and the only one designed by him that was built. The bridge is part of the world heritage site of the &quot;Plano Piloto&quot; of Brasília, by UNESCO. The investigation of the structural behavior of the bridge, to verify the need for rehabilitation, was made from visual inspections, geometric and topographic surveys, photographic records, extraction of samples of concrete, analysis of the original building design and after some occurrences along the way of time, structural monitoring. As a result of these investigations, several damages were identified, in particular: cracks in the webs of the box girders, concreting failures, increased permanent overload due to the thickness of the current pavement layer, leaching of concrete and, mainly, approximately 40 cm of deflection at cantilever beams. All of these damages were simulated in the numerical model of the bridge, proving that the excessive deflection at central span is resulted in the loss of prestressing due to stress corrosion and fatigue, reducing structural stiffness and can lead to sudden collapse. As the solution for rehabilitation of the structure was designed a reinforcement with external prestressing to reduce the cracking process and to neutralize the loss of prestressing, due to strands corrosion that can result in broken wires.</p>
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Zysk, Gregory, and Michael Oliver. "Farley Main Steam Flow-Induced Vibration Investigation." In ASME 2002 Pressure Vessels and Piping Conference. ASMEDC, 2002. http://dx.doi.org/10.1115/pvp2002-1134.

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Piping vibration had been observed in the Farley Unit 2 main steam system since plant start-up. Hanger damage occurred in several portions of the system, including inside containment, in the Main Steam Valve Room (MSVR), and in the turbine building. A program was undertaken to determine the cause of the failures in the main steam supports. This program included the installation of diagnostic equipment, data analysis, and acoustic and structural modeling in an effort to determine the root cause of the piping vibration. The program also addressed a modified system support scheme, which included the addition of vibration absorbing and dampening devices. Recommendations were also provided to resolve the vibration issue.
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Gilaki, Mehdi, Alex Francis, Daniel Bautista, and Ilya Avdeev. "Progress Toward Understanding Catastrophic Failure of Electric Vehicle Li-Ion Batteries: Multi-Physics Modeling." In ASME 2016 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/imece2016-67905.

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The goal of this work is to enhance understanding of critical design aspects that would prevent automotive lithium-ion battery packs from catastrophic failures. Modeling lithium-ion batteries is a complex multiscale multi-physics problem. The most dangerous energy producing component of a lithium ion cylindrical cell, jellyroll, is a layered spiral structure, which consists of thin layers of electrodes and separator only microns thick. In this study, we investigate the feasibility of using commercial explicit finite element code LS-DYNA to understand the structural integrity of lithium-ion batteries subjected to crushing condition through computer simulation. The jellyroll was treated as homogeneous material with an effective stress-strain curve obtained through characterization experiments of representative jellyroll samples and individual electrode layers. Physical and numerical impact tests have been conducted on cylindrical cells using developed drop test system. Results of material homogenization, experimental drop testing, and initial structural simulations are discussed. The investigation of structural cell deformations coupled with thermal heat generation and distribution after the crash brings us one step closer to accurate modeling of the entire battery pack that consists of hundreds of cells.
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Kharchenko, A. "Investigation of the Operational and Technological Reliability of the Small-size Internal Threading Process." In Modern Trends in Manufacturing Technologies and Equipment. Materials Research Forum LLC, 2022. http://dx.doi.org/10.21741/9781644901755-69.

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Abstract. The article presents the results of research in the direction of improving technological equipment for internal threading of parts in a flexible automated production. Methods for assessing the operational and technological reliability of a flexible manufacturing module (FMM) of thread processing are considered, which can be used as the basis for the developed method of synthesis of its elements. It is proposed to consider the technological system of the flexible manufacturing module (FMM) of thread processing as a system in which transitions from state to state occur under the action of the simplest flows with parameters of the transition probabilities of a continuous Markov chain. The developed mathematical model describing the state of the FMM taking into account the failures of the functioning of its elements, parametric failures, as well as taking into account the recovery after these types of failures, makes it possible to reflect the influence on the operation of the module of the parameters of the flows of failures and restorations of the tool, machine tool, fixture, loading device. The solution of the obtained systems of equations of final probabilities allows for given (or experimentally obtained) intensities of failure streams (functioning and parametric) for FMM threading to obtain the values of the probability of failure-free operation, as well as the probabilities of finding the system in an inoperative state due to corresponding failures. The measures taken make it possible to solve the synthesis problem at the level of structural and layout optimization, so that at the stage of parametric synthesis to determine the elements that are vulnerable according to the developed criterion, the improvement of which will lead to the creation of the most efficient system.
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Daniel, Ryszard A., and Timothy M. Paulus. "Handling Accidents and Calamities in Hydraulic Structures." In IABSE Congress, New York, New York 2019: The Evolving Metropolis. Zurich, Switzerland: International Association for Bridge and Structural Engineering (IABSE), 2019. http://dx.doi.org/10.2749/newyork.2019.2181.

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<p>Hydraulic closures in dams, navigation locks and flood barriers belong to the most heavily loaded structures built by people. While ensuring their sufficient strength is the main engineers’ concern, one must also be prepared to adequately handle their failures. Identifying and reducing the risks of failures is an issue of wider scope than structural analysis alone. Once an accident happens, proper investigations, handling the losses and planning the repair become primary goals. This paper gives a general guidance on these issues reflecting the European (mainly Dutch) and American practice. The discussion includes both handling the situations immediately after the accidents, and the choice between repair and replacement of a damaged structure. Accidents are infrequent events of very diverse causes and consequences, therefore this discussion has an engineering rather than statistical character.</p><p>Both authors contributed to resolving accidents and failures of hydraulic structures, in the roles varying from investigation or design leader to repair manager. They were also consulted or made part of crisis teams in a number of other so-called “upset events”. This paper combines the highlights of their own experience and the practices being followed by the waterway administrations in the USA and the Netherlands. The selected examples are also from these countries, but can be seen as reflecting issues and concerns anywhere.</p>
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Reports on the topic "Structural failures – Investigation"

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Shmulevich, Itzhak, Shrini Upadhyaya, Dror Rubinstein, Zvika Asaf, and Jeffrey P. Mitchell. Developing Simulation Tool for the Prediction of Cohesive Behavior Agricultural Materials Using Discrete Element Modeling. United States Department of Agriculture, October 2011. http://dx.doi.org/10.32747/2011.7697108.bard.

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The underlying similarity between soils, grains, fertilizers, concentrated animal feed, pellets, and mixtures is that they are all granular materials used in agriculture. Modeling such materials is a complex process due to the spatial variability of such media, the origin of the material (natural or biological), the nonlinearity of these materials, the contact phenomenon and flow that occur at the interface zone and between these granular materials, as well as the dynamic effect of the interaction process. The lack of a tool for studying such materials has limited the understanding of the phenomena relevant to them, which in turn has led to energy loss and poor quality products. The objective of this study was to develop a reliable prediction simulation tool for cohesive agricultural particle materials using Discrete Element Modeling (DEM). The specific objectives of this study were (1) to develop and verify a 3D cohesionless agricultural soil-tillage tool interaction model that enables the prediction of displacement and flow in the soil media, as well as forces acting on various tillage tools, using the discrete element method; (2) to develop a micro model for the DEM formulation by creating a cohesive contact model based on liquid bridge forces for various agriculture materials; (3) to extend the model to include both plastic and cohesive behavior of various materials, such as grain and soil structures (e.g., compaction level), textures (e.g., clay, loam, several grains), and moisture contents; (4) to develop a method to obtain the parameters for the cohesion contact model to represent specific materials. A DEM model was developed that can represent both plastic and cohesive behavior of soil. Soil cohesive behavior was achieved by considering tensile force between elements. The developed DEM model well represented the effect of wedge shape on soil behavior and reaction force. Laboratory test results showed that wedge penetration resistance in highly compacted soil was two times greater than that in low compacted soil, whereas DEM simulation with parameters obtained from the test of low compacted soil could not simply be extended to that of high compacted soil. The modified model took into account soil failure strength that could be changed with soil compaction. A three dimensional representation composed of normal displacement, shear failure strength and tensile failure strength was proposed to design mechanical properties between elements. The model based on the liquid bridge theory. An inter particle tension force measurement tool was developed and calibrated A comprehensive study of the parameters of the contact model for the DEM taking into account the cohesive/water-bridge was performed on various agricultural grains using this measurement tool. The modified DEM model was compared and validated against the test results. With the newly developed model and procedure for determination of DEM parameters, we could reproduce the high compacted soil behavior and reaction forces both qualitatively and quantitatively for the soil conditions and wedge shapes used in this study. Moreover, the effect of wedge shape on soil behavior and reaction force was well represented with the same parameters. During the research we made use of the commercial PFC3D to analyze soil tillage implements. An investigation was made of three different head drillers. A comparison of three commonly used soil tillage systems was completed, such as moldboard plow, disc plow and chisel plow. It can be concluded that the soil condition after plowing by the specific implement can be predicted by the DEM model. The chisel plow is the most economic tool for increasing soil porosity. The moldboard is the best tool for soil manipulation. It can be concluded that the discrete element simulation can be used as a reliable engineering tool for soil-implement interaction quantitatively and qualitatively.
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NUMERICAL INVESTIGATION ON CYCLIC BEHAVIOR OF RING-BEAM CONNECTION TO GANGUE CONCRETE FILLED STEEL TUBULAR COLUMNS. The Hong Kong Institute of Steel Construction, December 2021. http://dx.doi.org/10.18057/ijasc.2021.17.4.7.

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As a promising composite structure, gangue concrete filled steel tubular (GCFST) column exhibites favarable characteristics including high strength and economic efficiency. This paper conducted numerical investiagations on structural behavior of a ring-beam connection to GCFST column with concrete beam under cyclic loading. Furthermore, finite element models of column-beam connections were developed using ABAQUS and validated against full-scale experimental tests to identify accuracy of selected modeling approaches. Using these validated models, stress distribution of each component was examined to study the force-transferring mechanism among the components and failure modes of the ring-beam connection. Research study indicated that the ring-beam connection showed a reasonable force-transferring mechanism under cyclic loading and the remarkable earthquake-resistant performance with high capacity and acceptable ductility. Finally, parametric studies were performed to assess the influences of beam-to-column stiffness ratio,steel ratio, axial load level, and concrete compressive strength on connection cyclic behaviors. Parametric studies provided some suggestions and references for the application of the ring-beam connection in various engineering projects.
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EXPERIMENTS ON BOLTED CONNECTIONS IN COLD-ROLLED ALUMINIUM PORTAL FRAMES. The Hong Kong Institute of Steel Construction, August 2022. http://dx.doi.org/10.18057/icass2020.p.241.

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The use of portal frame systems composed of cold-rolled aluminium profiles is likely to be a new structural solution in corrosive environments. In such structural systems, stainless steel bolts are commonly used as connectors to fasten various aluminium components in the full-scale systems. In these connections, the point fasteners may experience either shear force, torque and/or a combination of both, leading to complex behaviours of the connections. While the failure may occur at a bolt, the other structural components are still in the elastic state. Hence, investigation into the load-deformation responses of bolt connectors is essential to further understand the complexity of bolted connections in the portal frame systems. In this study, experiments on different configurations of bolted connections subjected to shear force and/or torque were carried out at the University of Sydney to investigate the behaviour and to provide the load-deformation characteristics of the bolted connections
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PERFORMANCE EVALUATION OF INNOVATIVE COCONUT PALM STEM SHAPED STUD SHEAR CONNECTOR FOR COMPOSITE STRUCTURES. The Hong Kong Institute of Steel Construction, December 2022. http://dx.doi.org/10.18057/ijasc.2022.18.4.4.

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Headed studs are the more frequently employable shear connectors in composite structures. Despite its prevalence, this connector has exhibited remarkable drawbacks, prominently the shear failure at the bottom of the shank. In this research, three novel coconut palm stem (CPS) shaped studs are proposed for composite constructions, aiming to improve the shear capacity and slip performance of the connection. The traditional circular headed stud (CHS) geometry has been restructured to a proposed CPS-shaped stud while maintaining total steel material volume to be the same. Pushout tests were experimentally performed on CHS and CPS-shaped shear connectors to investigate their performance evaluation for ultimate strength, stiffness, ductility, and failure mode. Moreover, the Abaqus/Explicit has been employed to model a pushout specimen. A proposed finite element model was successfully validated with the test results for further parametric analysis. Two distinct grades of concrete and three CPS shapes were considered for the parametric investigation. Finally, three formulas were developed and proposed to predict the shear capacity of the CPS-shaped stud. The performance of the CHS and CPS-shaped stud connections was compared, revealing that the proposed CPS-shaped studs offer 37 to 47% higher shear strength, double stiffness, and slip with better ductility. So, CPS-shaped stud may substitute the traditional headed stud shear connectors in steel-concrete composite structures with added strength, stiffness, and ductility.
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PROGRESSIVE COLLAPSE RESISTANCE OF STEEL FRAMED BUILDINGS UNDER EXTREME EVENTS. The Hong Kong Institute of Steel Construction, September 2021. http://dx.doi.org/10.18057/ijasc.2021.17.3.10.

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This paper presents experimental and theoretical investigations on progressive collapse behavior of steel framed structures subjected to an extreme load such as fire, blast and impact. A new capacity-based index is proposed to quantify robustness of structures. An energy-based theoretical model is also proposed to quantify the effect of concrete slabs on collapse resistance of structures. The experimental results show that the dynamic amplification factors of frames subject to impact or blast are much less than the conventional value of 2.0. The collapse process of frames in fire can be either static or dynamic depending on the restraint conditions and load levels. It is necessary to account for the failure time and residual strength of blast-exposed columns for assessing the collapse resistance of structures subject to explosion. Two collapse modes of steel frames under blast or impact are found: connection-induced collapse mode and column-induced collapse mode. In case of fire, a frame may collapse due to either column buckling or pulling-in effect of beams. The energy dissipation from elongation of slab reinforcement and additional resultant moment greatly contribute to the collapse resistance of structures.
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EXPERIMENTAL AND NUMERICAL INVESTIGATION ON SEISMIC PERFORMANCE OF RING-BEAM CONNECTION TO GANGUE CONCRETE FILLED STEEL TUBULAR COLUMNS. The Hong Kong Institute of Steel Construction, March 2022. http://dx.doi.org/10.18057/ijasc.2022.18.1.9.

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This paper presents an investigation on seismic performance of a ring-beam connection that is used to connect reinforced gangue concrete (RGC) beam to coal-gangue concrete-filled steel tubular (GCFST) column. Two specimens, including an interior connection with two beams and an exterior connection with one beam, were designed and fabricated for experimental tests under full-reversing cyclic loads at beam ends. In addition, finite element models which corresponded to tested specimens were developed using ABAQUS to conduct numerical simulations of the composite connection subjected to the combined axial and cyclic loads. The feasibility of the developed model to predict failure modes and load-deformation response of the connection was validated by comparing with test results. The response of the ring-beam connection to cyclic loads was examined with respects to the load-bearing capacity, deformation resistance, stiffness and strength degradation, ability to dissipate energy in a seismic event, and ductility. With numerical models, parametric analysis was completed to evaluate the influences of material and structural parameters on connection resistance against cyclic loads. Based on the results of parametric studies, a restoring force model of skeleton curve for the ring-beam connection was developed in terms of ultimate capacity and corresponding deformation. The results provided practical suggestions for the application of ring-beam connection to GCFST column in the projects.
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