Relevant bibliographies by topics / Concrete construction Models

Academic literature on the topic 'Concrete construction Models'

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Published: 10 December 2022
Last updated: 29 January 2023

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Journal articles on the topic "Concrete construction Models"

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Le, Hoai-Bao, Quoc-Bao Bui, and Luping Tang. "Geopolymer Recycled Aggregate Concrete: From Experiments to Empirical Models." Materials 14, no. 5 (March 3, 2021): 1180. http://dx.doi.org/10.3390/ma14051180.

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Ordinary cement concrete is a popular material with numerous advantages when compared to other construction materials; however, ordinary concrete is also criticized from the public point of view due to the CO2 emission (during the cement manufacture) and the consumption of natural resources (for the aggregates). In the context of sustainable development and circular economy, the recycling of materials and the use of alternative binders which have less environmental impacts than cement are challenges for the construction sector. This paper presents a study on non-conventional concrete using recycled aggregates and alkali-activated binder. The specimens were prepared from low calcium fly ash (FA, an industrial by-product), sodium silicate solution, sodium hydroxide solution, fine aggregate from river sand, and recycled coarse aggregate. First, influences of different factors were investigated: the ratio between alkaline activated solution (AAS) and FA, and the curing temperature and the lignosulfonate superplasticizer. The interfacial transition zone of geopolymer recycled aggregate concrete (GRAC) was evaluated by microscopic analyses. Then, two empirical models, which are the modified versions of Feret’s and De Larrard’s models, respectively, for cement concretes, were investigated for the prediction of GRAC compressive strength; the parameters of these models were identified. The results showed the positive behaviour of GRAC investigated and the relevancy of the models proposed.
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Teijón-López-Zuazo, Evelio, Jorge López-Rebollo, Luis Javier Sánchez-Aparicio, Roberto Garcia-Martín, and Diego Gonzalez-Aguilera. "Compression and Strain Predictive Models in Non-Structural Recycled Concretes Made from Construction and Demolition Wastes." Materials 14, no. 12 (June 9, 2021): 3177. http://dx.doi.org/10.3390/ma14123177.

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This work aims to investigate different predictive models for estimating the unconfined compressive strength and the maximum peak strain of non-structural recycled concretes made up by ceramic and concrete wastes. The extensive experimental campaign carried out during this research includes granulometric analysis, physical and chemical analysis, and compression tests along with the use of the 3D digital image correlation as a method to estimate the maximum peak strain. The results obtained show that it is possible to accurately estimate the unconfined compressive strength for both types of concretes, as well as the maximum peak strain of concretes made up by ceramic waste. The peak strain for mixtures with concrete waste shows lower correlation values.
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Matejević-Nikolić, Biljana, and Lazar Živković. "Comparative Representation of Two Models for Predicting the Productivity of Column and Wall Concreting Process." Buildings 12, no. 11 (October 28, 2022): 1809. http://dx.doi.org/10.3390/buildings12111809.

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One of the most important tasks of managing the construction process is to achieve the highest possible productivity. The productivity that can be achieved on a construction site depends on a number of influencing factors and on the type of work that is executed. Concrete works are a crucial activity when constructing high-rise buildings built in the RC frame structural system. Therefore, it is very important to adequately manage the concreting process in order to meet the set deadlines and reduce costs. This paper presents an approach for predicting the productivity of the concreting process based on the conducted quantitative research, by recording the concreting process on construction sites of buildings in Niš, Serbia. The concreting of reinforced concrete columns and walls on seven construction sites was recorded for 20 months. The total amount of fresh concrete that is built into the elements is 848 m3 and the total duration is 114 h of work. Factors that can affect productivity have been identified and, by applying the multiple linear regression and simulation methods and techniques and using the discrete event method and the agent-based method, models have been developed to predict the productivity of the concreting of reinforced concrete columns and walls. An analysis of the developed models was performed, and a comparative presentation was provided.
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Červenka, Vladimír, and Radomír Pǔkl. "Computer Models of Concrete Structures." Structural Engineering International 2, no. 2 (May 1992): 103–7. http://dx.doi.org/10.2749/101686692780615905.

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Ungerer, Tobias. "Extending structural priming to test constructional relations: Some comments and suggestions." Yearbook of the German Cognitive Linguistics Association 10, no. 1 (November 1, 2022): 159–82. http://dx.doi.org/10.1515/gcla-2022-0008.

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Abstract Structural priming is a promising tool for testing similarity relations between constructions, but its applicability to larger-scale models of constructional networks is still limited. This article outlines the following two limitations of previous priming studies: first, they largely focus on priming between alternating constructions; and second, they often test the relations between instances of the same construction rather than between instances of different constructions. Three strategies are suggested for how future priming research could overcome these limitations. Concrete ideas for experimental setups are presented, and their benefits and limitations are addressed.
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Ben Ammar, Ben Khadda. "Valuation of Palm Fibers in the Formulation of Prefabricated Concrete in Southern Algeria." Key Engineering Materials 925 (July 11, 2022): 3–8. http://dx.doi.org/10.4028/p-t2ileb.

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Algeria has known various models of construction. The general observation is the failure of construction models used not only for their inability to meet the growing demand for housing, but also for the destruction of the architectural and urban landscape. Considering the ability of natural fibers improve the mechanical properties and durability of concrete, a renewable resource and permanently available. To this end, researchers have started to search for the most durable materials that respect the environment. The objective of this research is the study of the effect of date palm fibers in cementitious compositions with various proportions on the mechanical characteristics of prefabricated concretes in southern Algeria. The experimental study focuses on the use of local materials (CEMII Class 42.5 R cement, sand, gravel (7/15 and 15/25) and palm fiber with a water/cement ratio of 0.55). The results show that fiber concrete with a length of 5 mm and a dosage of 0.5% is beneficial for prefabricated fiber concrete.
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Van Eecke, Paul, and Katrien Beuls. "Exploring the Creative Potential of Computational Construction Grammar." Zeitschrift für Anglistik und Amerikanistik 66, no. 3 (September 25, 2018): 341–55. http://dx.doi.org/10.1515/zaa-2018-0029.

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AbstractComputational construction grammar aims to provide concrete processing models that operationalise construction grammar accounts of the different aspects of language. This paper discusses the computational mechanisms that allow construction grammar models to exhibit, to a certain extent, the creativity and inventiveness that is observed in human language use. It addresses two main types of language-related creativity. The first type concerns the ‘free combination of constructions,’ which gives rise to the open-endedness of language. The second type concerns the ‘appropriate violation of usual constraints’ that permits language users to go beyond what is possible when adhering to the usual constraints of the language, and be truly creative by relaxing these constraints and by introducing novel constructions. All mechanisms and examples discussed in this paper are fully operationalised and implemented in Fluid Construction Grammar.
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Lazarev, Yuriy, Oleg Krotov, Svetlana Belyaeva, and Marina Petrochenko. "3D environmentally friendly concrete printing model preparation." E3S Web of Conferences 175 (2020): 11024. http://dx.doi.org/10.1051/e3sconf/202017511024.

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This article considers ways of the construction printing of models for agriculture, road, civil and also industrial construction using concrete mixtures. For acquaintance with technology, the architectural element with width of layer of 4 cm and 8 cm all model high has been taken with height of one layer of 2 cm. This model has been prepared with use of two packages of the program complexes having different functionality, namely AutoCAD+SheetCAM+Mach3, the second Sketch-Up+Simplify3D. Each software package was used for design of model in 2D or 3D perspectives, division of model into layers, identical on height, by means of technology of slicer, and also for creation of task of the model printing by concrete for the construction printer of model S 6044. Ready mixes for geopolymer concrete have been taken. By results of the printing, comparison of quality of the models printed on the construction printer and technology of each package of program complexes have been made. The printing of models has shown that quality of the printing is identical. In this case, the second method using a bundle of 2 programs (SketchUp + Simplify3D), which allows printing volumetric models of any shape both in plan and in the future, has an advantage.
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Zhao, Nan, Chang Ming Hu, and Wen Yan. "Research and Statistic Analysis on Construction Loads of Multistory Frame R.C Buildings." Advanced Materials Research 368-373 (October 2011): 1531–34. http://dx.doi.org/10.4028/www.scientific.net/amr.368-373.1531.

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In order to control the safety of R.C structure, the construction loads of multistory frame reinforced concrete buildings in xi’an were selected as the research objective. Based on the characteristic of construction loads, the survey on the work site had carried on during the construction progress. Variation of concrete dead weight had been discussed. And the mathematics models of live loads in different stages of construction process for reinforced concrete buildings were proposed through statistic analysis. The standard values of construction live loads were suggested at last.
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Murashkin, Vasily G. "Features of Nonlinear Deformation of Concrete." Scientific journal “ACADEMIA. ARCHITECTURE AND CONSTRUCTION”, no. 1 (March 18, 2019): 128–32. http://dx.doi.org/10.22337/2077-9038-2019-1-128-132.

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In most studies, when the problem of determining a nonlinear model of deformation of structural concrete in normal environment, or experienced a variety of destructive (aggressive, temperature, etc.) exposure, using individual mathematical apparatus and software. The main criterion in these works for the construction of the deformation model of concrete was a unique relationship "strength - modulus of elasticity". Apply the developed model for another type of concrete or experienced a destructive impact was erroneous. However, not all features of concrete deformation in the construction of models were taken into account. In particular, the gentle nature of deformation in the initial stage of loading was not taken into account. Similarly, models of nonlinear deformation of concrete in normative materials of different countries are constructed. Especially there are problems in the inspection of structures operated for along time. It is not rational to create individual models based on the algorithm created earlier. In recent studies, a number of works have noted the need to take into account the features of the initial stage ofloading of concrete and the fact that concrete from the beginning ofloading has macro and micro cracks and structural defects. But even in these works the possibility of creating a nonlinear deformation model based on experimentally obtained data when testing prototypes of generalized model was not considered. This article discusses the possibility of constructing a concrete extracted from the structure. The possibility of replacing the individual deformation models with the proposed one is shown. In the generalized model of deformation "strength and modulus of elasticity" may not coincide with the normative characteristics and it can serve as a basis for determining the stress state in the survey of operated structures and, if necessary, for the design of new ones.
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Dissertations / Theses on the topic "Concrete construction Models"

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Khadka, Chandra. "PENALIZED REGRESSION MODELS FOR CONCRETE STRENGTH ESTIMATION." OpenSIUC, 2021. https://opensiuc.lib.siu.edu/theses/2818.

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Concrete compressive strength is one of the most important material properties affectingthe design of concrete structures. Strength that will be achieved once the concrete sets should be correctly predicted prior to pouring the concrete. Regression techniques can be used to calculate the 28-day concrete strength with a level of certainty. This thesis deals with the data modelling and analysis of 28-day compressive strength of high-performance concrete. Historical data on various mix compositions of high-performance concrete was obtained from University of California, Irvine repository. The data had 8 predictors and 1 response variable. In this thesis, three penalized regression approaches, namely, ridge, lasso, and elastic net were used to create a predictive model for compressive strength, and the performance of these model were compared to the traditional multiple linear regression model. Holdout sets from 2% to 40% at an increment of 2% were taken. Every regression algorithm was designed to conduct regression on 30 sets of randomly partitioned data. The performance of models was assessed using coefficient of multiple determination, RMSE, and residual plots. All regression techniques were able to predict the concrete strength with about 75% accuracy level.
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Hon, Alan 1976. "Compressive membrane action in reinforced concrete beam-and-slab bridge decks." Monash University, Dept. of Civil Engineering, 2003. http://arrow.monash.edu.au/hdl/1959.1/5629.

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Liu, Chi-hong, and 廖志航. "Time-dependent behaviour of concrete structures with special referenceto podium and frame structures." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2007. http://hub.hku.hk/bib/B38674245.

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Yousuf, Saif. "Structural Low Cement Content (LCC) Concrete: An Eco-friendly Alternative for Construction Industry." Thesis, Université d'Ottawa / University of Ottawa, 2018. http://hdl.handle.net/10393/37590.

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Pressure is mounting in the construction industry to adopt more environmentally sustainable methods to reduce CO2 emissions. Portland cement (PC) often constitutes to more than two-thirds of the embodied energy of concrete, and its production generates 5% of global greenhouse gas emissions. One efficient strategy to reduce the cement content without sacrificing performance is the use of particle packing models (PPM) to mix- proportion concrete mixtures with low cement content, the so-called low cement content (LCC) concrete. If on the one hand LCC was seen to be an effective sustainable alternative to the construction industry, its mechanical behaviour, durability and long-term performance are still under debate and thus further research is needed in the area. In this project, continuous PPM theories were used to mix- design structural concrete mixes presenting distinct mechanical properties (i.e. 25 & 35 MPa) and cement contents. Their performance was evaluated in the fresh and hardened states, and gaps, recommendations, and further needs were highlighted. Results show that the use of PPM enables the development of LCC systems, showing impressive hardened state performance (i.e. higher compressive strength and modulus of elasticity and lower electrical resistivity) and low carbon footprint. However, challenges in the fresh state were faced, which may be potentially solved with the use of chemical admixtures, fillers and/or supplementary cementing materials (SCMs).
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Ng, Pui-lam, and 吳沛林. "Constitutive modelling and finite element analysis of reinforced concrete structures." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2007. http://hub.hku.hk/bib/B3897566X.

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Lam, Wai-yin, and 林慧賢. "Plate-reinforced composite coupling beams: experimental and numerical studies." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2006. http://hub.hku.hk/bib/B37311797.

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Choi, Joonho. "Concurrent fire dynamic models and thermomechanical analysis of steel and concrete structures." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/26679.

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Thölken, Denise. "Efeito da rigidez de pilar parede no comportamento sísmico de edifício de concreto armado." Universidade Tecnológica Federal do Paraná, 2013. http://repositorio.utfpr.edu.br/jspui/handle/1/962.

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Este trabalho tem como objeto o estudo do efeito da rigidez de pilar parede no comportamento estrutural de edifícios de concreto armado submetidos a sismos. Foram consideradas as premissas da norma brasileira ABNT NBR15421:2006, que apresenta os critérios para projeto de estruturas resistentes a sismo. A análise linear com emprego dos métodos da norma - método das forças horizontais equivalentes, método espectral e histórico de aceleração no tempo - foi aplicada em edifícios com dois tipos de sistemas estruturais, sendo eles pórtico de concreto e sistema dual pórtico de concreto e pilar parede. Os resultados foram analisados nos pórticos de extremidade das estruturas nos sentidos longitudinal (x) e transversal (y), comparando-se os deslocamentos de cada pavimento e esforços cortantes, momento fletor e normal nas bases dos pilares. A comparação foi realizada entre os três métodos aplicados e os sistemas estruturais analisados.
The aim of this work is to study the stiffness effect of wall columns on structural behavior of reinforced concrete buildings subjected to seismic action. The premises of the Brazilian standard ABNT NBR14521:2006 were considered, which presents criteria for earthquake resistant design of structures. The linear analysis employed the methods of the Brazilian standard - equivalent static load method, response spectrum analysis and time history method - were applied to buildings with two types of structural systems, namely concrete frame and dual system concrete frame and wall columns. The results were analyzed in edge frames structures in the longitudinal and transverse directions, comparing the displacement of each floor and shear, bending moment and axial forces on the bases of the columns. A comparison was made between the three methods applied and the structural systems analyzed.
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Hu, Jong Wan. "Seismic performance evaluations and analyses for composite moment frames with smart SMA PR-CFT connections." Diss., Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/22655.

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This thesis investigates the performance of composite frame structures with smart partially-restrained (PR) concrete filled tube (CFT) column connections through simplified 2D and advanced 3D computational simulations. It also provides a design methodology for new types of innovative connections based on achieving a beam hinging mechanism. These types of connections intend to utilize the recentering properties of super-elastic SMA tension bars, the energy dissipation capacity of low-carbon steel bars, and the robustness of CFT columns. In the first part of this study, three different PR-CFT connection prototypes were designed based on a hierarchy of strength models for each connection component. Numerical simulations with refined three dimensional (3D) solid elements were conducted on full scale PR-CFT connection models in order to verify the strength models and evaluate the system performance under static loading. Based on system information obtained from these analyses, simplified connection models were formulated by replacing the individual connection components with spring elements and condensing their contributions. Connection behavior under cyclic loads was extrapolated and then compared with the monotonic behavior. In the second part of this study, the application of these connections to low-rise composite frames was illustrated by designing both 2D and 3D, 4 and 6 story buildings for the Los Angeles region. A total of 36 frames were studied. Pushover curves plotted as the normalized shear force versus inter story drift ratio (ISDR) showed significant transition points: elastic range or proportional limit, full yielding of the cross-section, strength hardening, ultimate strength, and strength degradation or stability limit. Based on the transition points in the monotonic pushover curves, three performance levels were defined: Design Point, Yield Point, and Ultimate Point. All frames were stable up to the yield point level. For all fames, after reaching the ultimate point, plastic rotation increased significantly and concentrated on the lower levels. These observations were quantified through the use of elastic strength ratios and inelastic curvature ductility ratios. The composite frames showed superior performance over traditional welded ones in terms of ductility and stability, and validated the premises of this research.
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Deumic, Emina, and Damir Sadic. "FE analysis of interlocking C3C solid concrete blocks without casting." Thesis, Linnéuniversitetet, Institutionen för teknik, TEK, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-12051.

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Solid concrete Lego blocks can be used as temporary retaining wall systems or as wall separators between different materials such as sand, salt, compost, etc. The advantage of concrete blocks is that you can create temporary constructions. It is easy to move or expand the constructions when no casting is required between the blocks. The purpose of this study is to make models in the Finite Element (FE) software Abaqus/CAE that can be used for calculations of the capacity for interlocking blocks. FE method is an approximate method for solving differential equations. As the concrete blocks are stacked without casting, it is important to find out the construction’s load capacity when it is subjected to a horizontal load. Several types of structures have been modeled in the FE program Abaqus/CAE. These FE models were created with boundary conditions consisting of springs and a pinned connection that allows rotation.The evaluation has been focused on rotating the interlocking blocks. With the help of the FE models, reaction forces have been calculated. The FE results in term of reaction forces have been compared with hand calculations made ​​for the same models. Moreover, a wall and a wall with lateral supports have been simulated to determine the horizontal reaction force for the interlocking concrete blocks.
Massiva Lego betongblock kan ändvänds som tillfälliga stödmurar eller vägg avskiljare för olika material som salt, kompost, sand mm. Fördelen med betongblocken är att man kan skapa tillfälliga konstruktioner. Det är lätt att flytta eller bygga ut konstruktionen när ingen fog krävs mellan blocken. Syftet med denna studie är att skapa modeller i Finita Element (FE) programmet Abaqus/CAE som kan senare användas för beräkning av kapaciteten för sammankopplade block. FE Metoden är en approximativ metod för att lösa differential ekvationer. Eftersom betongblocken är staplade på varandra utan fog är det viktigt att ta reda på konstruktionens lastupptagnings förmåga när den är belastade med horisontalkrafter. Flera typer av konstruktioner har modellerats i FE programmet Abaqus/CAE. Dessa FE modeller har skapats med randvillkor som består av fjädrar och fasta lager som tillåter rotation. Utvärderingen har gjorts med fokus på vältningen i betongblocken. Med hjälp av dessa FE modeller har reaktionskraften tagits fram. FE resultaten i form av reaktionskrafter har sedan jämförts med handberäkningar gjorda för samma modeller. Vidare har en vägg och en vägg med sidostöd FE modellerats för att utvärdera horisontala deformationsegenskaper.
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Books on the topic "Concrete construction Models"

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Concrete and concrete structures: Numerical modelling and applications. London: Elsevier Applied Science, 1989.

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A, Noor F., and Boswell L. F, eds. Small scale modelling of concrete structures. London: Elsevier Applied Science, 1992.

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Dynamic behavior of concrete structures. Amsterdam: Elsevier, 1994.

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Elezaby, Yehia K. Modelling and design of unbraced reinforced concrete frames. Edmonton, Alta: Dept. of Civil Engineering, University of Alberta, 1992.

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A, Pimanmas, and Okamura Hajime 1938-, eds. Nonlinear mechanics of reinforced concrete. New York: Spon Press, 2003.

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L, Clarke J., Garas F. K, Armer G. S. T, and Institution of Structural Engineers (Great Britain). Informal Study Group for "Model Analysis as a Design Tool"., eds. Design of concrete structures: The use of model analysis. London: Elsevier Applied Science Publishers, 1985.

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Knorovsky, G. A. Evaluation of materials of construction for the reinforced concrete reactor containment model. Washington, DC: Division of Engineering, Office of Nuclear Regulatory Research, U.S. Nuclear Regulatory Commission, 1988.

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IABSE Colloquium (1987 Delft, Netherlands). Computational mechanics of concrete structures: Advances and applications : report. Zürich, Switzerland: IABSE, 1987.

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Tetsuya, Ishida, and Kishi Toshiharu 1955-, eds. Multi-scale modelling of structural concrete. London: Taylor & Francis, 2008.

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Tekkin konkurīto kōzō no sekkei. Tōkyō: Morikita Shuppan, 2001.

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Book chapters on the topic "Concrete construction Models"

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Ranzi, Gianluca, Giovanni Di Luzio, Massimiliano Bocciarelli, Graziano Leoni, Ahmet Abdullah Dönmez, Gianluca Cusatis, Alejandro Pérez Caldentey, and Raymond Ian Gilbert. "Time-dependent behaviour of concrete." In Time-dependent behaviour and design of composite steel-concrete structures, 13–40. Zurich, Switzerland: International Association for Bridge and Structural Engineering (IABSE), 2021. http://dx.doi.org/10.2749/sed018.ch2.

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<p>This chapter provides an introduction to the constitutive models commonly specified in design guidelines to describe the time-dependent behaviour of concrete and that can be used for the time-dependent analysis of composite structures. These formulations range from the simplest algebraic methods, such as the Effective Modulus Method that is widely recommended in design guidelines, to more sophisticated approaches that can account for creep and shrinkage effects in advanced modelling. The last part of the chapter provides a brief overview of multi-physics modelling that could be useful in predicting the concrete time-dependent response for composite construction.</p>
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Mohemmi, Morteza. "An Algorithm to Obtain Moment-Curvature Diagram for Reinforced Concrete Sections." In Lecture Notes in Civil Engineering, 31–45. Singapore: Springer Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-1260-3_4.

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AbstractReinforced concrete is one of the most common materials in construction and knowledge of the behavior of reinforced concrete with lateral reinforcement has been one of the important topics in researches. Due to the high cost of laboratory studies, researchers have tried to develop numerical methods with the help of relationships obtained from analytical researches as well as various programs including finite element codes. In most studies, moment-curvature diagrams in reinforced concrete with confined cores have been significant in studying the behavior and performance of reinforced concrete sections. In this research, using analytical relations and applying MATLAB program, a suitable algorithm for calculating the moment-curvature in reinforced concrete columns with lateral reinforcement is presented. In this algorithm, the famous Mander and Kent and Park models are used and a method for eliminating the non-confined concrete cover during the analysis is proposed. Finally, the moment-curvature was obtained for 4 sections of reinforced concrete and compared with the KSU-RC program, which show a good agreement.
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Ranzi, Gianluca, Raymond Ian Gilbert, Graziano Leoni, Luigino Dezi, Alejandro Pérez Caldentey, Javier Jordán, John Hewitt, Roberto Leon, and Marion Rauch. "Introduction." In Time-dependent behaviour and design of composite steel-concrete structures, 1–12. Zurich, Switzerland: International Association for Bridge and Structural Engineering (IABSE), 2021. http://dx.doi.org/10.2749/sed018.ch1.

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<p>This chapter provides an introduction to the constitutive models commonly specified in design guidelines to describe the time-dependent behaviour of concrete and that can be used for the time-dependent analysis of composite structures. These formulations range from the simplest algebraic methods, such as the Effective Modulus Method that is widely recommended in design guidelines, to more sophisticated approaches that can account for creep and shrinkage effects in advanced modelling. The last part of the chapter provides a brief overview of multi-physics modelling that could be useful in predicting the concrete time-dependent response for composite construction.</p>
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Libby, James R. "Bridge Construction." In Modern Prestressed Concrete, 620–41. Boston, MA: Springer US, 1990. http://dx.doi.org/10.1007/978-1-4615-3918-6_14.

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Libby, James R. "Construction Considerations." In Modern Prestressed Concrete, 696–733. Boston, MA: Springer US, 1990. http://dx.doi.org/10.1007/978-1-4615-3918-6_17.

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Watts, Andrew. "Masonry cavity walls: Stone and concrete block." In Modern Construction Envelopes, 210–19. Vienna: Springer Vienna, 2011. http://dx.doi.org/10.1007/978-3-7091-0258-9_20.

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Watts, Andrew. "Masonry loadbearing walls: Brick, stone and concrete block." In Modern Construction Envelopes, 190–99. Vienna: Springer Vienna, 2011. http://dx.doi.org/10.1007/978-3-7091-0258-9_18.

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Lu, Yang, Stephen Thomas, and Edward J. Garboczi. "A Real Microstructural Model for Cement Concrete Modeling." In Nanotechnology in Construction, 301–8. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-17088-6_39.

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Glasspool, David W., and John Fox. "Understanding probability words by constructing concrete mental models." In Proceedings of the Twenty First Annual Conference of the Cognitive Science Society, 185–90. New York: Psychology Press, 2020. http://dx.doi.org/10.4324/9781410603494-37.

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Bertagnoli, Gabriele, Mario Alex Biagini, and Giuseppe Mancini. "Orthotropic Model for the Analysis of Beams with Corrugated Steel Webs." In Innovative Materials and Techniques in Concrete Construction, 361–76. Dordrecht: Springer Netherlands, 2011. http://dx.doi.org/10.1007/978-94-007-1997-2_24.

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Conference papers on the topic "Concrete construction Models"

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Haldar, Malay, Gagandeep Singh, Saurabh Prabhakar, Basant Dwivedi, and Antara Ghosh. "Construction of concrete verification models from C++." In the 45th annual conference. New York, New York, USA: ACM Press, 2008. http://dx.doi.org/10.1145/1391469.1391707.

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Apandi, Nazirah Mohd, Chau-Khun Ma, Abdullah Zawawi Awang, and Wahid Omar. "Compressive strength models of repaired concrete structures." In PROCEEDINGS OF THE 3RD INTERNATIONAL CONFERENCE ON CONSTRUCTION AND BUILDING ENGINEERING (ICONBUILD) 2017: Smart Construction Towards Global Challenges. Author(s), 2017. http://dx.doi.org/10.1063/1.5011491.

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Afsari, Kereshmeh, and Charles Eastman. "Consolidated Exchange Models for Implementing Precast Concrete Model View Definition." In 33th International Symposium on Automation and Robotics in Construction. International Association for Automation and Robotics in Construction (IAARC), 2016. http://dx.doi.org/10.22260/isarc2016/0127.

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Contreras-Nieto, Cristian, Phil Lewis, and Yongwei Shan. "Developing Predictive Models of Superstructure Ratings for Steel and Prestressed Concrete Bridges." In Construction Research Congress 2016. Reston, VA: American Society of Civil Engineers, 2016. http://dx.doi.org/10.1061/9780784479827.087.

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Salvatore, Walter, Aurelio Braconi, and Oreste S. Bursi. "Component-Based Models of Dissipative Partial-Strength Beam-to-Column Composite Joints." In Fifth International Conference on Composite Construction in Steel and Concrete. Reston, VA: American Society of Civil Engineers, 2006. http://dx.doi.org/10.1061/40826(186)43.

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Demonceau, J. F., C. Haremza, J. P. Jaspart, A. Santiago, and L. Simões da Silva. "Composite Joints under M-N at Elevated Temperatures: Experimental Investigations and Analytical Models." In International Conference on Composite Construction in Steel and Concrete 2013. Reston, VA: American Society of Civil Engineers, 2016. http://dx.doi.org/10.1061/9780784479735.029.

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Moshiri, F., R. Shrestha, and K. Crews. "Predictive Models for the Stiffness of Vertical Screws as Shear Connection in Timber-Concrete Composite Floors." In International Conference on Composite Construction in Steel and Concrete 2013. Reston, VA: American Society of Civil Engineers, 2016. http://dx.doi.org/10.1061/9780784479735.050.

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Vonco, Okuhle, and Jan Wium. "An approach to reduce concrete rework using Building Information Models." 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.2021.0920.

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<p>The paper describes a risk-based approach to enable construction teams to predict potential areas of rework. This is achieved by capturing historic construction data of concrete elements using Building Information Models (BIM), augmented by manual capturing by project parameters.</p><p>The approach consists of two parts. In the first part data is captured of relevant project parameters that may impact on rework. This data is stored in a database and relationships are determined between these factors and the occurrence of rework using a machine learning approach. In a second part concrete elements in a BIM is verified against the database to determine the rework risk of the element.</p><p>The approach will enable construction teams to pro-actively manage the construction process to reduce the probability of rework with resulting savings in time and cost.</p>
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Johnson, Roger P. "Models for the Longitudinal Shear Resistance of Composite Slabs, and the Use of Non-Standard Test Data." In Fifth International Conference on Composite Construction in Steel and Concrete. Reston, VA: American Society of Civil Engineers, 2006. http://dx.doi.org/10.1061/40826(186)16.

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Heikkilä, Rauno, Mika Jaakkola, and Pekka Pulkkinen. "Modeling Measurements and Measuring Models – Problems and Solutions of 3-D Geometrical Control in Concrete Bridge Engineering." In 21st International Symposium on Automation and Robotics in Construction. International Association for Automation and Robotics in Construction (IAARC), 2004. http://dx.doi.org/10.22260/isarc2004/0017.

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Reports on the topic "Concrete construction Models"

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Grasty, R. L., and Y. B. Blanchard. The design, construction, and application of concrete models for calibrating borehole gamma-ray spectrometers. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1993. http://dx.doi.org/10.4095/193320.

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DeSantis, John, and Jeffery Roesler. Longitudinal Cracking Investigation on I-72 Experimental Unbonded Concrete Overlay. Illinois Center for Transportation, February 2022. http://dx.doi.org/10.36501/0197-9191/22-002.

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A research study investigated longitudinal cracking developing along an experimental unbonded concrete overlay (UBOL) on I-72 near Riverton, Illinois. The project evaluated existing literature on UBOL (design, construction, and performance), UBOL case studies, and mechanistic-empirical design procedures for defining the mechanisms that are contributing to the observed distresses. Detailed distress surveys and coring were conducted to assess the extent of the longitudinal cracking and faulting along the longitudinal lane-shoulder joint. Coring over the transverse contraction joints in the driving lane showed stripping and erosion of the dense-graded hot-mix asphalt (HMA) interlayer was the primary mechanism initiating the longitudinal cracks. Cores from the lane-shoulder joint confirmed stripping and erosion was also occurring there and leading to the elevation difference between the driving lane and shoulder. Field sections by surrounding state departments of transportation (DOTs), such as Iowa, Michigan, Minnesota, Missouri, and Pennsylvania, with similar UBOL design features to the I-72 section were examined. Site visits were performed in Illinois, Michigan, Minnesota, and Pennsylvania, while other sections were reviewed via state DOT contacts as well as Google Earth and Maps. Evidence from other DOTs suggested that HMA interlayers, whether dense graded or drainable, could experience stripping, erosion, and instability under certain conditions. An existing performance test for interlayers, i.e., Hamburg wheel-tracking device, and current models reviewed were not able to predict the distresses on I-72 eastbound. Adapting a dynamic cylinder test is a next step to screen HMA interlayers (or other stabilized layers) for stripping and erosion potential. To slow down the cracking and faulting on I-72 eastbound, sealing of the longitudinal lane-shoulder joint and driving lane transverse joints is suggested. To maximize UBOL service life, an HMA overlay will minimize water infiltration into the interlayer system and significantly slow down the HMA stripping and erosion mechanism that has led to longitudinal cracking and lane-shoulder faulting.
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Yevtuch, Mykola B., Vasyl M. Fedorets, Oksana V. Klochko, Mariya P. Shyshkina, and Alla V. Dobryden. Development of the health-preserving competence of a physical education teacher on the basis of N. Bernstein's theory of movements construction using virtual reality technologies. CEUR Workshop Proceedings, July 2021. http://dx.doi.org/10.31812/123456789/4634.

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The article studies the results of the research aimed at the improvement of the methodology of develop- ment of the health-preserving competence of a Physical Education teacher in conditions of post-graduate education on the basis of Nikolai Bernstein’s theory of movement construction using virtual reality technologies. Based on the use of AR/VR technologies a software application “Virtual Model Illustrating Nikolai Bernstein’s Theory of Movement Construction” was developed. The stated model is one of the tools of the “Methodology of development of the health preserving competence of a Physical Educa- tion teacher on the basis of Nikolai Bernstein’s theory of the levels of movement construction”. The experimental study determines that the application of the virtual model within the stated methodology is an effective tool for the development of the health preserving competence of a Physical Education teacher. The application of the virtual model allows the actualization of the health preserving, conceptual, gnoseological, biomechanical, inclusive, corrective potentials of Nikolai Bernstein’s theory of movement construction. The use of the virtual model presents the ways of targeted and meaningful use of Nikolai Bernstein’s theory of the levels of movement construction by a Physical Education teacher and the improvement of physical and recreational technologies and concrete physical exercises and movement modes. Due to the application of virtual reality tools, health-preserving, preventative, corrective and developmental strategies are being formed among which the significant ones are: “Application of syner- gistic movements to adaptation to movement activity, and recreation”, “Application of spatial movements for actualization of the orientation and search activities and development of spatial thinking”, “Use of movements with a complicated algorithm for intellect development”.
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He, Rui, Na (Luna) Lu, and Jan Olek. Development of In-Situ Sensing Method for the Monitoring of Water-Cement (w/c) Values and the Effectiveness of Curing Concrete. Purdue University, 2022. http://dx.doi.org/10.5703/1288284317377.

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As the most widely used construction material, concrete is very durable and can provide long service life without extensive maintenance. The strength and durability of concrete are primarily influenced by the initial water-cement ratio value (w/c), and the curing condition during the hardening process also influences its performance. The w/c value is defined as the total mass of free water that can be consumed by hydration divided by the total mass of cement and any additional pozzolanic material such as fly ash, slag, silica fume. Once placed, field concrete pavements are routinely cured with liquid membrane-forming compounds. For laboratory study, concrete samples are usually cured in saturated lime water or a curing room with a relative humidity (RH) value higher than 95%. Thus, the effectiveness of curing compounds for field concrete needs to be studied. In this study, the dielectric constant value of plastic concrete was measured by ground penetrating radar (GPR). The w/c value of the plastic concrete was calculated by a mathematical model from the measured dielectric constant value. The calculated w/c value was compared with the microwave oven drying measurement determined result in AASHTO T318. A modified coarse aggregate correction factor was proposed and applied in microwave oven drying measurement to determine the w/c value of plastic concrete in AASHTO T318. The effectiveness of curing compound was evaluated by field concrete slabs by GPR measurement. It was found that GPR can be a promising NDT method for In this study, the dielectric constant value of plastic concrete was measured by ground penetrating radar (GPR). The w/c value of the plastic concrete was calculated by a mathematical model from the measured dielectric constant value. The calculated w/c value was compared with the microwave oven drying measurement determined result in AASHTO T318. A modified coarse aggregate correction factor was proposed and applied in microwave oven drying measurement to determine the w/c value of plastic concrete in AASHTO T318. The effectiveness of curing compound was evaluated by field concrete slabs by GPR measurement. It was found that GPR can be a promising NDT method for w/c determination of plastic concrete and curing effectiveness evaluation method for hardened concrete.
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FINITE ELEMENT SIMULATION FOR ULTRA-HIGH-PERFORMANCE CONCRETE-FILLED DOUBLE-SKIN TUBES EXPOSED TO FIRE. The Hong Kong Institute of Steel Construction, August 2022. http://dx.doi.org/10.18057/icass2020.p.263.

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Ultra-high-performance concrete (UHPC) or ultra-high-strength concrete (UHSC) are alternatively used to reduce construction materials, thereby achieving more sustainable constructions. Moreover, engaging the advantages of concrete cores and outer steel tubes in concrete-filled steel tubes (CFST) or ductile concrete-filled double-skin tubes (CFDST) is of great interest for the better performance of such members under fire. Nevertheless, current design provisions do not provide design models for UHPC-filled double-skin tubes under fire, and existing finite-element (FE) methodologies available in the literature may not accurately simulate the behaviour of CFDST exposed to fire. Therefore, this paper develops a comprehensive FE protocol implementing the scripting technique to model CFDST members for heat transfer and coupled (simultaneously or sequentially) thermal-stress analyses. Various modelling parameters incorporated in the proposed FE routine include the cross-sectional geometry (circular, elliptical, hexagonal, octagonal, and rectangular), the size (width, diameter, and wall thickness), interactions, meshing, thermal- and mechanical-material properties, and boundary conditions. The detailed algorithm for heat transfer analysis is presented and elaborated via a flow chart. Validations, verifications, and robustness of the developed FE models are established based on extensive comparison studies with existing fire tests available in the literature. As a result, and to recognize the value of the current FE methodology, an extensive parametric study is conducted for different affecting parameters (e.g., nominal steel ratio, hollowness ratio, concrete cylindrical strength, yield strength of metal tubes, and width-to-thickness ratio). Extensive FE results are used for optimizing the fire design of such members. Consequently, a simplified and accurate analytical model that can provide the axial load capacity of CFDST columns under different fire ratings is presented
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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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