Academic literature on the topic 'Stub Column'

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Journal articles on the topic "Stub Column"

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Wang, Zhan Fei, Lin Ge, Bao Yun Sun, Yue Ma, and Ke Liu. "Elasto-Plastic Mechanical Behavior of Steel Box Stub Column under Cyclic Uniaxial Tensile and Compressive Load." Applied Mechanics and Materials 578-579 (July 2014): 960–63. http://dx.doi.org/10.4028/www.scientific.net/amm.578-579.960.

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In this paper, to study mechanical behavior of steel box stub column under cyclic uniaxial tensile and compressive load, elasto-plastic analysis of the segment is carried out by using ABAQUS package. In this study, with changing parameters (such as length-width ratio L/B, width-thickness ratio RR) of the box stub column, the hysteresis curves, skeleton curves, stress distribution and deformation of the ultimate state for the steel box stub-column are investigated. These results show the L/B and RR have little impact on the ultimate strength and ductility of stub-columns during the tensile stage. However, RR has obvious impact on the elasto-plastic mechanical behavior and local deformation under compressive load.
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Xu, Yunlong, Fei Lyu, Faxing Ding, Chenglu Liu, and En Wang. "Analytical Modelling of LACFCST Stub Columns Subjected to Axial Compression." Mathematics 9, no. 9 (April 23, 2021): 948. http://dx.doi.org/10.3390/math9090948.

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This paper presents a numerical investigation of lightweight aggregate concrete-filled circular steel tubular (LACFCST) stub columns under axial compression. A finite 3D solid element model of the LACFCST stub column was established by adopting a plastic-damage constitutive model of lightweight aggregate concrete (LAC). The finite element model (FEM) analysis results revealed that the confinement effect of the steel tube on the infilled LAC was weaker than that on the infilled conventional concrete. A parametric study making use of 95 full-scale FEMs was conducted to investigate the influences of various design parameters of LACFCST stub columns on their ultimate axial bearing capacity and the composite actions. Moreover, a numerical model of the axial and transverse stress of steel tubes at the ultimate state of LACFCST columns was proposed using the regression method. Based on the equilibrium conditions and the proposed model, a practical design formula making use of an enhancement factor was derived to estimate the ultimate bearing capacity of LACFCST stub columns by using the superposition method. The validity of the proposed formula was verified against the experimental data of 49 LACFCST stub column specimens under the axial loading available in the literature. Meanwhile, the accuracy and conciseness of the proposed formula were evaluated by comparison with the formulas suggested by the existing design codes.
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Huo, Jing Si, Guo Wang Huang, and Yan Xiao. "Effects of Sustained Pre-Load on Residual Strength and Stiffness of Concrete-Filled Steel Tube after Exposure to High Temperatures." Key Engineering Materials 400-402 (October 2008): 769–74. http://dx.doi.org/10.4028/www.scientific.net/kem.400-402.769.

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This paper experimentally investigated the effects of axial load level on the residual strength and stiffness of concrete-filled steel tubular (CFT) stub columns which were heated and cooled down to room temperature under sustained axial load. Eight stub columns were axially loaded and heated to specified high temperatures in a purpose-built electric furnace. After the specimens cooled down to room temperature while the axial load was kept constant, the stub columns were loaded to failure. The test results show that not only the axial load level and the high temperature exposure have significant effects on the residual strength and stiffness of stub column, but the residual strength index and stiffness index of the fire-damaged CFT stub columns with pre-load are remarkably different from those without pre-load. From the test results, it is recommended that the sustained axial load effects and the fire cooling phase should be taken into consideration in assessing the fire-damaged CFT columns.
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Ting, Chui Huon Tina, and Hieng Ho Lau. "Compression Test on Cold-Formed Steel Built-Up Back-to-Back Channels Stub Columns." Advanced Materials Research 201-203 (February 2011): 2900–2903. http://dx.doi.org/10.4028/www.scientific.net/amr.201-203.2900.

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Built-up sections are used to resist load induced in a structure when a single section is not sufficient to carry the design load for example roof trusses. In current North American Specification, the provision has been substantially taken from research in hot-rolled built-up members connected with bolts or welds [1]. The aim of this paper is to investigate on built-up back-to-back channels stub columns experimentally and theoretically using Effective Width Method and Direct Strength Method. Compression test was performed on 5 lipped channel and 5 back-to-back channels stub columns fabricated from cold-formed steel sheets of 1.2mm thicknesses. The test results indicated that local buckling is the dominant failure modes of stub columns. Therefore, Effective Width Method predicts the capacity of stub columns compared to Direct Strength Method. When compared to the average test results, results based on EWM are 5% higher while results based on DSM are 12% higher for stub column.
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Vidya, K. C., and George M. Varghese. "Performance of Lean Duplex Stainless Steel Stub Columns with Stiffener." Applied Mechanics and Materials 857 (November 2016): 171–76. http://dx.doi.org/10.4028/www.scientific.net/amm.857.171.

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The stainless steel are employed in a wide range of structural application such as in bridges, storage tanks, reinforcing bars for concrete structure, etc. Among the various grade of stainless steel, austenitic grades are generally popular in construction industry which has nickel content 8-11%. The demand for a new form of a duplex stainless steel leads to the development of Lean Duplex Stainless Steel (LDSS), which has a low nickel content of about 1.5%. The paper is investigates the buckling performance of different shaped lean duplex stainless steel hollow stub column with stiffener. Also performance of LDSS stub column compared with concrete stub column. A non-linear static analysis of LDSS stub column was studied using ANSYS workbench.
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Mirzaie Aliabadi, Mahbobeh, Mohammad Reza Bahaari, and Shahabeddin Torabian. "Design and Analytical Evaluation of a New Self-Centering Connection with Bolted T-Stub Devices." Advances in Materials Science and Engineering 2013 (2013): 1–12. http://dx.doi.org/10.1155/2013/163021.

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A new posttensioned T-stub connection (PTTC) for earthquake resistant steel moment resisting frames (MRFs) is introduced. The proposed connection consists of high strength posttensioned (PT) strands and bolted T-stubs. The post-tensioning strands run through the column and are anchored against the flange of the exterior column. The T-stubs, providing energy dissipation, are bolted to the flange of beam and column and no field welding is required. The strands compress the T-stub against the column flange to develop the resisting moment to service loads and to provide a restoring force that returns the structure to its initial position following an earthquake. An analytical model based on fiber elements is developed in OpenSees to model PTTCs. The analytical model can predict the expected behavior of the new proposed connection under cyclic loading. PTTC provides similar characteristic behavior of the posttensioned connections. Both theoretical behavior and design methods are proposed, and the design methods are verified based on parametric studies and comparison to analytical results. The parametric studies prove the desired self-centering behavior of PTTC and show that this connection can reduce or eliminate the plastic rotation by its self-centering behavior as well as providing required strength and stiffness under large earthquake rotations.
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Zhang, Fengjie, Junwu Xia, Guo Li, Zhen Guo, Hongfei Chang, and Kejin Wang. "Degradation of Axial Ultimate Load-Bearing Capacity of Circular Thin-Walled Concrete-Filled Steel Tubular Stub Columns after Corrosion." Materials 13, no. 3 (February 10, 2020): 795. http://dx.doi.org/10.3390/ma13030795.

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This work aimed to investigate the effects of steel tube corrosion on the axial ultimate load-bearing capacity (AULC) of circular thin-walled concrete-filled steel tubular (CFST) members. Circular thin-walled CFST stub column specimens were made of steel tubes with various wall-thicknesses. These CFST column specimens were subjected to an accelerated corrosion test, where the steel tubes were corroded to different degrees of corrosion. Then, these CFST specimens with corroded steel tubes experienced an axial static loading test. Results show that the failure patterns of circular thin-walled CFST stub columns with corroded steel tubes are different from those of the counterpart CFST columns with ordinary wall-thickness steel tubes, which is a typical failure mode of shear bulging with slight local outward buckling. The ultimate strength and plastic deformation capacity of the CFST specimens decreased with the increasing degree of steel corrosion. The failure modes of the specimens still belonged to ductile failure because of the confinement of outer steel tube. The degree of steel tube corrosion, diameter-to-thickness ratio, and confinement coefficient had substantial influences on the AULC and the ultimate compressive strength of circular thin-walled CFST stub columns. A simple AULC prediction model for corroded circular thin-walled CFST stub columns was presented through the regression of the experimental data and parameter analysis.
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Pokharel, Tilak, Helen Goldsworthy, and Emad Gad. "Low Damage Moment Resisting Connection Using Blind Bolts." Key Engineering Materials 763 (February 2018): 189–96. http://dx.doi.org/10.4028/www.scientific.net/kem.763.189.

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Concrete Filled Steel Tubes (CFSTs) are being used as columns in moment resisting frames in many parts of the world. Because of their aesthetic appearance, favourable ductility and large load bearing capacity, they are popular with architects and engineers. The use of CFSTs is limited in some countries (like Australia) due to the problems and cost associated with the connection of steel beams to the closed column section, unlike open H-shaped columns where ordinary structural bolts can be used. In this paper, a structural system is proposed which uses moment resisting frames as the lateral load resisting system. This system eliminates the use of welds at the site, which is the most common method, although expensive, which is used to achieve a moment resisting connections. The proposed system uses double T-stub connections to connect universal beams on opposite sides of the CFST column, and headed anchored blind bolts are used to connect those T-stubs to the column. This system provides sufficient stiffness and strength to be used in low to mid-rise buildings in low to moderate seismic regions. The proposed system uses a capacity design method to limit the load and non-recoverable damage in the connection (especially in the anchorage). One of the components in the connection, the web of the bottom T-stub, is designed as a fuse to create a low damage system for very rare earthquakes.
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Wang, Ji Zhong, Lu Cheng, and Xin Pei Wang. "Experimental Research of FRP Composite Tube Confined Steel-reinforced Concrete Stub Columns Under Axial Compression." E3S Web of Conferences 38 (2018): 03035. http://dx.doi.org/10.1051/e3sconf/20183803035.

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A new column of FRP composite tube confined steel-reinforced concrete (FTCSRC) column was proposed. This paper elaborates on laboratorial and analytical studies on the behavior of FCTSRC columns subjected to axial compressive load. Eight circular FTCSRC stub columns and one circular steel tube confined concrete (STCC) stub column were tested to investigate the failure mode and axial compression performance of circular FTCRSC columns. Parametric analysis was implemented to inquire the influence of confinement material (CFRP-steel tube or CFRP-GFRP tube), internal steel and CFRP layers on the ultimate load capacity. CFRP-steel composite tube was composed of steel tube and CFRP layer which was wrapped outside the steel tube, while CFRP-GFRP composite tube was composite of GFRP tube and CFRP layer. The test results indicate that the confinement effect of CFRP-steel tube is greatly superior to CFRP-GFRP tube. The ductility performance of steel tube confined high-strength concrete column can be improved obviously by encasing steel in the core concrete. Furthermore, with the increase in the layers of FRP wraps, the axial load capacity increases greatly.
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Wang, Yuan Xi, Xi Kai Du, and Jing Hong Liu. "Research on the mechanical properties of concrete stub column under axial compression loading with square steel tube self-compacting iron tailing." E3S Web of Conferences 165 (2020): 04024. http://dx.doi.org/10.1051/e3sconf/202016504024.

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In this paper, the influence of steel rate and substitution rate of iron tailing powder on the bearing capacity of the stub columns is mainly investigated through the test of five concrete stub columns under axial compression loading with square steel tube self-compacting iron tailing, and the test bearing capacity is compared with the bearing capacity calculated by each code. The test results show that the bearing capacity of the test piece increases obviously with the increase of the steel content; the bearing capacity of the test piece is less affected by the substitution rate of iron tailing powder; it is suggested to use code GB50936-2014 to design and calculate the bearing capacity of the stub column under axial compression loading.
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Dissertations / Theses on the topic "Stub Column"

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Smallidge, Jeffrey M. "Behavior of bolted beam-to-column T-stub connections under cyclic loading." Thesis, Georgia Institute of Technology, 1999. http://hdl.handle.net/1853/19534.

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Schrauben, Corey S. "Behavior of full-scale bolted beam-to-column T-stub and clip angle connections under cyclic loading." Thesis, Georgia Institute of Technology, 1999. http://hdl.handle.net/1853/20013.

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YANG, Demao. "Compression Stability of High Strength Steel Sections with Low Strain-Hardening." University of Sydney. School of Civil Engineering, 2003. http://hdl.handle.net/2123/561.

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Thin-walled steel sections made from high strength thin cold-reduced G550 steel to Australian Standard AS 1397-1993 under compression are investigated experimentally and theoretically in this thesis. This thesis describes three series of compression tests performed on box-section stub columns, box-section long columns and lipped channel section columns cold-formed from high strength steel plates in 0.42 mm or 0.60 mm thickness with nominal yield stress of 550 MPa. The tests presented in this thesis formed part of an Australian Research Council research project entitled: Compression Stability of High Strength Steel Sections with Low Strain-Hardening. For the fix-ended stub column tests, a total of 94 lipped-square and hexagonal section stub columns were tested to study the influence of low strain hardening of G550 steel on the compressive section capacities of the column members. For the pin-ended long column tests, a total of 28 box-section columns were tested to study the stability of members with sections which undergo local instability at loads significantly less than the ultimate loads. For the fix-ended lipped channel section columns, a total of 21 stub and long columns were tested to study the failure resulting from local and distortional buckling with interaction between the modes. A numerical simulation on the three series of tests using the commercial finite element computer program ABAQUS is also presented as part of this thesis. The post-buckling behaviour of thin-walled compression members is investigated. The effect of changing variables, such as geometric imperfections and end boundary conditions is also investigated. The ABAQUS analysis gives accurate simulations of the tests and is in good agreement to the experimental results. Theoretical studies using finite strip methods are presented in this thesis to investigate the buckling behaviour of cold-formed members in compression. The theoretical studies provide valuable information on the local and distortional buckling stresses for use in the interaction buckling studies. The finite strip models used are the semi-analytical and spline models. As expected for the stub columns tests, the greatest effect of low strain hardening was for the stockier sections where material properties play an important role. For the more slender sections where elastic local buckling and post-local buckling are more important, the effect of low strain hardening does not appear to be as significant. The pin-ended and fix-ended long column tests show that interaction, which is between local and overall buckling in the box sections, and between local and distortional buckling in the open channel sections, has a significant effect on their member capacities. The results of the successful column tests and ABAQUS simulation have been compared with the design procedures in the Australian & New Zealand Standard for Cold-Formed Steel Structures AS&NZS 4600 and the North American Specification for Cold-Formed Steel Structural Members prepared by the American Iron and Steel Institute. The stub column tests show that the current design rules give too conservative predictions on the compressive section capacities of the column members; whereas the long column tests show that the current column design rules are unconservative if used in their current form for G550 steel. Three design proposals are presented in this thesis to account for the effects of high strength thin steels on the section and member capacities.
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Nuttayasakul, Nuthaporn. "Experimental and Analytical Studies of the Behavior of Cold-Formed Steel Roof Truss Elements." Diss., Virginia Tech, 2005. http://hdl.handle.net/10919/29765.

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Cold-formed steel roof truss systems that use complex stiffener patterns in existing hat shape members for both top and bottom chord elements are a growing trend in the North American steel framing industry. When designing cold-formed steel sections, a structural engineer typically tries to improve the local buckling behavior of the cold-formed steel elements. The complex hat shape has proved to limit the negative influence of local buckling, however, distortional buckling can be the controlling mode of failure in the design of chord members with intermediate unbraced lengths. The chord member may be subjected to both bending and compression because of the continuity of the top and bottom chords. These members are not typically braced between panel points in a truss. Current 2001 North American Specifications (NAS 2001) do not provide an explicit check for distortional buckling. This dissertation focuses on the behavior of complex hat shape members commonly used for both the top and bottom chord elements of a cold-formed steel truss. The results of flexural tests of complex hat shape members are described. In addition, stub column tests of nested C-sections used as web members and full scale cold-formed steel roof truss tests are reported. Numerical analyses using finite strip and finite element procedures were developed for the complex hat shape chord member in bending to compare with experimental results. Both elastic buckling and inelastic postbuckling finite element analyses were performed. A parametric study was also conducted to investigate the factors that affect the ultimate strength behavior of a particular complex hat shape. The experimental results and numerical analyses confirmed that modifications to the 2001 North American Specification are necessary to better predict the flexural strength of complex hat shape members, especially those members subjected to distortional buckling. Either finite strip or finite element analysis can be used to better predict the flexural strength of complex hat shape members. Better understanding of the flexural behavior of these complex hat shapes is necessary to obtain efficient, safe design of a truss system. The results of these analyses will be presented in the dissertation.
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Đorđe, Jovanović. "Понашање моментих веза са чеоном плочом и четири завртња у реду." Phd thesis, Univerzitet u Novom Sadu, Fakultet tehničkih nauka u Novom Sadu, 2020. https://www.cris.uns.ac.rs/record.jsf?recordId=113927&source=NDLTD&language=en.

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У овом раду спроведене су опсежна експериментална и нумеричкаиспитивања понашања веза са чеоном плочом и четири завртња у реду,као и карактеристичне компоненте ових веза - Т-елемента.Експериментална испитивања укључују тестирања 36 узоракаТ-елемената у природној величини, као и четири везе греда-стуб сачеоном плочом и четири завртња у реду, такође у природној величини.Нумеричке анализе, спроведене у софтверском пакету ABAQUS, суобухватале све типове нелинеарности, али и отказ материјала, те се каотакве сврставају међу ретке којима су слични проблеми нумеричкииспитивани. Параметарска студија обухвата 33 различите конфигурацијеТ-елемената са четири завртња и представља највећу такву студијуизведену за ову компоненту. Као основни још увек нерешен проблем,круцијалан за понашање Т-елемената, препознати су положај сила уследефеката полуге, али и савијање завтњева. Приказан је и предложен новианалитички модел прорачуна носивости Т-елемената са четири завртња,и квантификована његова предност над до сада постојећим моделима.
U ovom radu sprovedene su opsežna eksperimentalna i numeričkaispitivanja ponašanja veza sa čeonom pločom i četiri zavrtnja u redu,kao i karakteristične komponente ovih veza - T-elementa.Eksperimentalna ispitivanja uključuju testiranja 36 uzorakaT-elemenata u prirodnoj veličini, kao i četiri veze greda-stub sačeonom pločom i četiri zavrtnja u redu, takođe u prirodnoj veličini.Numeričke analize, sprovedene u softverskom paketu ABAQUS, suobuhvatale sve tipove nelinearnosti, ali i otkaz materijala, te se kaotakve svrstavaju među retke kojima su slični problemi numeričkiispitivani. Parametarska studija obuhvata 33 različite konfiguracijeT-elemenata sa četiri zavrtnja i predstavlja najveću takvu studijuizvedenu za ovu komponentu. Kao osnovni još uvek nerešen problem,krucijalan za ponašanje T-elemenata, prepoznati su položaj sila usledefekata poluge, ali i savijanje zavtnjeva. Prikazan je i predložen novianalitički model proračuna nosivosti T-elemenata sa četiri zavrtnja,i kvantifikovana njegova prednost nad do sada postojećim modelima.
In this research, extensive experimental and numerical investigations ofbehaviour of end-plate moment connection with four bolts per row areperformed, as well as specific component of the connection – T-stub element.Experimental research comprises tests on 36 unscaled specimens of T-stubelements and 4 specimens of beam-to-column joints with end-plate connectionand four bolts per row, also in full-size. Numerical analyses, performed withsoftware ABAQUS, included all types of nonlinearities, and materialdeterioration, hence they can be considered as one of the few mostsophisticated analyses used for investigation of the considered problem. Theparametric study comprises 33 different configurations of the T-stub elementwith four bolts per row and it presents the biggest study of this kind for this typeof component. Bending of the bolts and position of the prying forces arerecognized as the largest, still unsolved problem, crucial for the behavior of theT-stub elements. A new theoretical model for the resistance of the T-stubelement with four bolts per row is proposed and its advantage over the existingmodels is presented and quantified.
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Dechka, David Charles. "Response of shear-stud-reinforced continuous slab-column frames to seismic loads." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/nq64854.pdf.

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Luo, Yunbiao. "Development of Stud-SFRCC Connection and Its Application to Composite Beam-to-Column Connections." 京都大学 (Kyoto University), 2013. http://hdl.handle.net/2433/180497.

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Scott, Joseph E. "Column Buckling Analysis of Wood Stud Members due to Reduced Stiffness over Partial Member Length." The Ohio State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=osu1543325743355501.

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Hess, W. Gregory (Willard). "Cyclic behavior of shape memory alloy tendons and steel bolted t-stubs in beam-column connections." Thesis, Georgia Institute of Technology, 2000. http://hdl.handle.net/1853/20740.

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Green, Travis P. "Behavior of full-scale partially-restrained beam-to-column T-stubn and shear tab connections under cyclic loading." Thesis, Georgia Institute of Technology, 2000. http://hdl.handle.net/1853/20720.

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Book chapters on the topic "Stub Column"

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Sachidananda, Khwairakpam, and Waikhom Victory. "Strength of Perforated Steel Oval Stocky Stub Column." In Advances in Sustainable Construction Materials, 397–403. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-33-4590-4_38.

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Huynh, Le Anh Thi, Cao Hung Pham, and Kim J. R. Rasmussen. "Numerical Simulations of Cold-Rolled Aluminium Alloy 5052 Channel Sections in Stub Column Tests." In Lecture Notes in Civil Engineering, 202–12. Singapore: Springer Singapore, 2017. http://dx.doi.org/10.1007/978-981-10-6713-6_19.

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Sachidananda, Khwairakpam, and Konjengbam Darunkumar Singh. "Numerical Study of the Effect of Boundary Conditions on Buckling Behaviour of Flat Oval LDSS Stub Column Under Axial Compression." In Lecture Notes in Civil Engineering, 515–23. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-0362-3_41.

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Singh, Tekcham Gishan, and Konjengbam Darunkumar Singh. "Semi-elliptical LDSS Hollow Stub Columns Under Axial Compression." In Lecture Notes in Civil Engineering, 327–37. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-0362-3_26.

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Jia, Liang-Jiu, and Hanbin Ge. "Application to Post-buckling Ductile Fracture of Steel Stub Columns." In Ultra-low-Cycle Fatigue Failure of Metal Structures under Strong Earthquakes, 107–29. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-2661-5_7.

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Sachidananda, Khwairakpam, and Konjengbam Darunkumar Singh. "Strength Comparison of Fixed Ended Square, Flat Oval and Circular Stub LDSS Columns." In Advances in Structural Engineering, 2417–23. New Delhi: Springer India, 2015. http://dx.doi.org/10.1007/978-81-322-2187-6_184.

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Li, Xiaowei, Wei Chen, Xuewei Li, Yukun Quan, and Hongfen Nian. "Ultimate bearing capacity of concrete-filled-steel-tubular circular stub columns under axial compression." In Advances in Energy Science and Equipment Engineering II, 1033–38. Taylor & Francis Group, 6000 Broken Sound Parkway NW, Suite 300, Boca Raton, FL 33487-2742: CRC Press, 2017. http://dx.doi.org/10.1201/9781315116174-38.

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Luckkikanun, A., U. Prawatwong, and P. Warnitchai. "Cyclic Testing of Bonded Post-tensioned Interior Slab-Column Connections with Shear Stud." In Lecture Notes in Civil Engineering, 1625–34. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-8079-6_150.

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Sobajima, K., J. Nie, T. Miyashita, S. Okada, N. Takeshima, and K. Ono. "An Experimental Study on Local Buckling Strength of Welded Box Section Stub-Columns Made of SBHS400." In Lecture Notes in Civil Engineering, 1403–13. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-8079-6_131.

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"Stub column test procedure." In Testing of Metals for Structures, 393–94. CRC Press, 1991. http://dx.doi.org/10.1201/9781482267068-41.

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Conference papers on the topic "Stub Column"

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He, Ziqi, Dan Gan, Tao Zhang, and Xuhong Zhou. "Experimental investigation on the bamboo-concrete filled circular steel tubular stub columns." In 12th international conference on ‘Advances in Steel-Concrete Composite Structures’ - ASCCS 2018. Valencia: Universitat Politècnica València, 2018. http://dx.doi.org/10.4995/asccs2018.2018.7138.

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Concrete-filled steel tubes have been widely used all over the world due to their superior structural behaviour. To promote the use of ecofriendly materials and to reduce the use of concrete, this paper presents an innovative type of composite column, which can be referred as bamboo-concrete filled steel tubes. In this kind of column, concrete filled in the space between the external steel tube and the inner raw moso bamboo. Bamboo-concrete filled steel tubes inherit the merits of concrete-filled steel tubes such as high load-bearing capacity and ductility performance. Besides, global buckling behaviour of a bamboo column due to its relatively large slenderness can be significantly improved, and the bamboo column with nodes could provide confinement to the infilled concrete. This paper investigated the composite effect of bamboo-concrete filled steel tubular stub columns subjected to axial compression. In addition, concrete-filled double-skin steel tubular stub columns and hollow concrete-filled steel tubular stub columns were also tested for comparison. The main experimental parameter considered was the diameter-to-thickness ratio (D/t) of steel tube. Test results indicated that the composite columns with moso bamboo pipe as inner core elements showed better ductility than the hollow concrete-filled steel tubular stub columns. The bearing capacity and ductility visibly increased with decreasing of the D/t ratio.
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Güler, Soner, Fuat Korkut, Namik Yaltay, and Demet Yavuz. "Axial behaviour of concrete filled steel tube stub columns: a review." In 12th international conference on ‘Advances in Steel-Concrete Composite Structures’ - ASCCS 2018. Valencia: Universitat Politècnica València, 2018. http://dx.doi.org/10.4995/asccs2018.2018.7602.

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Concrete-filled steel tubular (CFST) columns are widely used in construction of high-rise buildings and peers of bridges to increase the lateral stiffness of the buildings, the axial load capacity, ductility, toughness, and resistance of corrosion of the columns. The CFST columns have much superior characteristics compared with traditionally reinforced concrete columns. The position of the concrete and steel tube in the cross-section of the CFST column is the most appropriate solution in terms of the strength and ductility. The steel tube, which is placed outside of the cross-section of the column, withstand the bending moment effectively. The concrete that is placed into the steel tube delay the local buckling of the steel tube and increase the axial load capacity of the column due to continually lateral confining. This paper presents a review on experimental results of the axial behavior of CFST columns performed by various researchers.
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Liao, Feiyu, Chao Hou, W. J. Zhang, and J. Ren. "Tests on sea sand concrete-filled stainless steel tubular stub columns." In 12th international conference on ‘Advances in Steel-Concrete Composite Structures’ - ASCCS 2018. Valencia: Universitat Politècnica València, 2018. http://dx.doi.org/10.4995/asccs2018.2018.6937.

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This paper presents a series of tests on sea sand concrete-filled stainless steel tubular (SSCFST) stub columns under axial compression, where the main test parameters include type of fine aggregates (river sand, desalted sea sand and sea sand), steel ratio, and concrete strength. The failure mode, axial load versus axial shorten response, cross-sectional strength of the SSCFST specimens are investigated and compared with those of traditional composite columns with normal concrete. The confinement effect between stainless tube and the sea sand concrete is also evaluated. High strength and good ductility was observed for the tested SSCFST stub columns. In general, when being used as the concrete core in a composite column, differences of confinement behaviour between sea sand concrete and normal concrete are not significant, indicating the potential adoption of SSCFST columns in practice.
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F. R., Mashiri, Uy B., and Shah B. "Stub Column Tests of Concrete-Filled VHS-Plate Fabricated Sections." In 4th International Conference on Steel & Composite Structures. Singapore: Research Publishing Services, 2010. http://dx.doi.org/10.3850/978-981-08-6218-3_cc-th021.

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Sulthana, U. Mashudha, and S. Arul Jayachandran. "Investigations on global buckling behaviour of concrete-filled double-skinned steel tubular columns." In 12th international conference on ‘Advances in Steel-Concrete Composite Structures’ - ASCCS 2018. Valencia: Universitat Politècnica València, 2018. http://dx.doi.org/10.4995/asccs2018.2018.7144.

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Concrete-Filled Double-skinned Steel Tubular columns (CFDST) are proved to possess exceptional structural resistance in case of fire and multi-hazard situations. This superior quality of CFDST makes it preferable in long column applications. However, studies on the long column behaviour of CFDST is very few, and their results are not in line with the behaviour of CFST long columns. Whereas, several researches on stub column CFDST shows that, the axial compression behaviour of CFDST is similar to CFST. In this paper, selected results (4 numbers of circular CFDST specimens) from a large test data is presented. Axial compression behaviour of long column CFDST specimens is studied, with non-dimensional slenderness λ around 1.0, and hollowness ratio as the governing parameter for study. Test results namely, axial load carrying capacity, axial deformation and lateral deflection are presented in this paper. Numerical models are also developed and validated with the experimental results, to carry out more parametric studies. Further, the experimental axial capacity values are compared with modified capacity equations from EC4 and AISC. Results show that extended EC4 and AISC equations gives conservative predictions for CFDST column even in the long column range. Moreover, the initial imperfections in the specimen and their corresponding boundary conditions for load application, are found to be governing parameters in long column buckling study.
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Li, Zeshen, Ying Su, and Keshi Zhang. "Numerical Analysis Of The T-stub Beam-to- Column Hysteretic Behavior Affected By Beam Height." In 2016 International Conference on Advances in Energy, Environment and Chemical Science. Paris, France: Atlantis Press, 2016. http://dx.doi.org/10.2991/aeecs-16.2016.70.

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Ushijima, Yuki, Sho Masumoto, Ryo Murata, and Minoru Yamanari. "Development of an Education System for Structural Design of Reinforced Concrete Stub Cladding Steel Column-Base." In 10th Pacific Structural Steel Conference (PSSC 2013). Singapore: Research Publishing Services, 2013. http://dx.doi.org/10.3850/978-981-07-7137-9_122.

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Shin, Soomi, Hyemin Kim, and Hyunjung Park. "Structural Tests and Analyses of H-Shaped Beam-to-Column Connections with Reformed T-stub Components." In Green and Smart Technology 2015. Science & Engineering Research Support soCiety, 2015. http://dx.doi.org/10.14257/astl.2015.120.121.

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Zhang, Dan, and Lei Zhang. "Analysis of Bending Bearing Capacity of Fully Bolted Outer Shell Beam-Column Joint Connected by T-Stub." In 2018 7th International Conference on Energy, Environment and Sustainable Development (ICEESD 2018). Paris, France: Atlantis Press, 2018. http://dx.doi.org/10.2991/iceesd-18.2018.277.

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DeBoo, Guy, Kevin Ramsden, and Roman Gesior. "Quad Cities Unit 2 Main Steam Line Acoustic Source Identification and Load Reduction." In 14th International Conference on Nuclear Engineering. ASMEDC, 2006. http://dx.doi.org/10.1115/icone14-89903.

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The Quad Cities Units 1 and 2 have a history of steam line vibration issues. The implementation of an Extended Power Uprate resulted in significant increases in steam line vibration as well as acoustic loading of the steam dryers, which led to equipment failures and fatigue cracking of the dryers. This paper discusses the results of extensive data collection on the Quad Cities Unit 2 replacement dryer and the Main Steam Lines. This data was taken with the intent of identifying acoustic sources in the steam system. Review of the data confirmed that vortex shedding coupled column resonance in the relief and safety valve stub pipes were the principal sources of large magnitude acoustic loads in the main steam system. Modifications were developed in subscale testing to alter the acoustic properties of the valve standpipes and add acoustic damping to the system. The modifications developed and installed consisted of acoustic side branches that were attached to the Electromatic Relief Valve (ERV) and Main Steam Safety Valve (MSSV) attachment pipes. Subsequent post-modification testing was performed in plant to confirm the effectiveness of the modifications. The modifications have been demonstrated to reduce vibration loads at full Extended Power Uprate (EPU) conditions to levels below those at Original Licensed Thermal Power (OLTP).
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Reports on the topic "Stub Column"

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WANG, Liping, Xing-Xing CAO, Fa-Xing DING, and Yi SUN. COMPRESSION TESTS OF CONCRETE-FILLED DOUBLE CIRCULAR STEEL TUBULAR STUB COLUMNS. The Hong Kong Institute of Steel Construction, December 2018. http://dx.doi.org/10.18057/icass2018.p.083.

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Yang, Chang, Zhixiang Yu, Shichun Zhao, Yuping Sun, Hua Zhao, and Hu Xu. POST-BUCKLING BEHAVIOUR OF CONCRETE-FILLED CIRCULAR STEEL TUBE STUB COLUMNS UNDER AXIAL COMPRESSION. The Hong Kong Institute of Steel Construction, December 2018. http://dx.doi.org/10.18057/icass2018.p.148.

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Fang, Han, and Tak-Ming Chan. STRUCTURAL PERFORMANCE OF HOT-FINISHED HIGH STRENGTH STEEL SQUARE TUBULAR STUB COLUMNS AT ELEVATED TEMPERATURES. The Hong Kong Institute of Steel Construction, December 2018. http://dx.doi.org/10.18057/icass2018.p.151.

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EXPERIMENTAL STUDY ON SEISMIC PERFORMANCE OF PEC COMPOSITE COLUMN-STEEL BEAM FRAME WITH WELDED T-STUB STRENGTHENED CONNECTIONS. The Hong Kong Institute of Steel Construction, September 2021. http://dx.doi.org/10.18057/ijasc.2021.17.3.5.

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Seismic performance of innovative Partially Encased Composite (PEC) column-steel beam composite frame was investigated, where the connection was strengthened by the welded T-stub. A ½ scale, two-storey, and one bay composite frame specimen was designed and fabricated for the quasi-static test. Through the experimental observation and measurements, the seismic performance were evaluated, including hysteretic characteristic, lateral stiffness, seismic energy dissipation, and ductility. The plastic damage evolution process and ductile failure mode were clarified. The results indicated that the welded T-stud strengthened connection enhanced the integrity of the frame and led to higher seismic strength and larger lateral stiffness. The plastic hinge was observed away from the beam end due to the welded T-stud and the specimen exhibited an approximately completed hysteretic loop. Without significant decreasing of the ultimate bearing capacity, its overall drift, ductility efficient and equivalent viscous damping ratio were 3.63% (push) / 4.07% (pull), 3.21 (push) / 3.70 (pull) and 0.261 respectively. The proposed structure possesses sound deformation, ductility, and energy-dissipation capacity with the desired plastic failure mode induced by the plastic hinges formed in all beam sections near the T-stud end and column section at the bottom, successively. It was demonstrated an ideal ductile energy-dissipation mode of the frame structure.
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COMPOSITE EFFECT OF STUB SQUARE STEEL TUBED COLUMNS UNDER AXIAL COMPRESSION. The Hong Kong Institute of Steel Construction, June 2018. http://dx.doi.org/10.18057/ijasc.2018.14.2.8.

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CAPACITY OF COLD-FORMED STEEL HOLLOW STUB COLUMNS WITH CENTRAL CIRCULAR PERFORATIONS. The Hong Kong Institute of Steel Construction, December 2018. http://dx.doi.org/10.18057/icass2018.p.013.

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AXIAL BEHAVIOR OF HIGH-STRENGTH CONCRETE-FILLEDHIGH-STRENGTH SQUARE STEEL TUBULAR STUB COLUMNS. The Hong Kong Institute of Steel Construction, June 2021. http://dx.doi.org/10.18057/ijasc.2021.17.2.6.

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AXIAL RESIDUAL CAPACITY OF CIRCULAR CONCRETE-FILLED STEEL TUBE STUB COLUMNS CONSIDERING LOCAL BUCKLING. The Hong Kong Institute of Steel Construction, September 2018. http://dx.doi.org/10.18057/ijasc.2018.14.3.11.

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