The Stability of Precast Concrete Skeletal Structures

Elliott, Kim S.; Davies, G.; Görgün, Halil

doi:10.15554/pcij.03011998.42.60

Cited by 20 publications

(18 citation statements)

References 3 publications

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“…Welded plate and billet connection: Since 1990, some 24 tests (Elliot et al, 1998) had been conducted to investigate the reliability of welded plate and billet connectors. Figure 4 illustrates the main typical components of a billet connector.…”

Section: Resultsmentioning

confidence: 99%

“…An international survey which was carried out in 1996-97 on behalf of the FIP Commission on Prefabrication had revealed that the amount of intended future development for precast structures was less than 1 out of 30th as compared to researches in structural steelwork (Elliot et al, 1998). Before this millennium, most of the beam-column joints were designed as pinned connections.…”

Section: Beam-column Connectionsmentioning

confidence: 99%

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Performance of IBS Precast Concrete Beam-Column Connections Under Earthquake Effects: A Literature Review

Yee¹

2011

American Journal of Engineering and Applied Sciences

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Problem statement: Despite demonstrating rather much benefits comparing to the conventional cast-in-place construction, the acceptance level of precast concrete building is still reportedly low in Malaysia. The implication imposed by stricter seismic design provisions would only worsen the matter. Approach: The main objective of this study was to identify the most appropriate type of beam-column connections to be introduced to precast concrete industry, particularly for regions of low to moderate seismicity. Hence, this study presented a comprehensive literature overview of the findings from studies conducted to analyze and investigate the behavior of precast concrete systems assembled with typical connections or joints under simulated earthquake loading. Results: The seismic performance of precast concrete structure very much depended on the ductility capacity of the connectors jointing each precast components, especially at critical joints such as the beam-to-column connections. It was learnt from the review that (1) hybrid post-tensioned beam-column connection and (2) Dywidag Ductile Connector® were among the most widely used connectors for precast construction in seismic prone regions. Conclusion: Future refinement and research could be carried out in order to optimize these connections to be used in low seismicity regions. Proposed connection type should be practical and well-accepted to avoid further impediment of the precast system.

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Section: Resultsmentioning

confidence: 99%

Section: Beam-column Connectionsmentioning

confidence: 99%

Performance of IBS Precast Concrete Beam-Column Connections Under Earthquake Effects: A Literature Review

Yee¹

2011

American Journal of Engineering and Applied Sciences

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“…The physical nonlinearity of the connection can be simplified by using the secant stiffness [4]). The theoretical models for the design of semi-rigid connections proposed by these authors were compared with various experimental results of typical connections, which, in some cases, present a higher than 95% correlation between theoretical and experimental values for the moment vs. rotation ratio, as highlighted by Elliot et al [5]. [10], a slight increase in connection stiffness significantly reduces lateral displacements and global second-order effects.…”

Section: Semi-rigid Connectionsmentioning

confidence: 99%

“…It should be noted that after these analyses, the displacement at the top of the frame is checked in order to satisfy the ABNT NBR 9062:2006 standard [2]. For the analysis of the Ultimate Limit State (ULS) situations, the most appropriate normal ultimate combination is expressed by Equation [5], which uses wind as the main variable force. Overloads were admitted for places with high concentrations of people (Ψ 0 =0.7).…”

Section: Figurementioning

confidence: 99%

“…These connections are usually designed as joints or brackets, which is not always the case in real structures. In terms of the semi-rigidity of the connection, the actual behavior of the structure is well represented by the structural model, which distributes the second-order moments of the columns to the beams, and even allows the dimensions of the cross-sectional areas of the elements to be scaled down, thus reducing their loads when compared to the hinge condition (Elliot et al [3]). This paper has as main objective to do the optimization of the structural behavior of precast concrete slabs formed by semi-rigid connections, noting the importance of facilitating the constructive aspects.…”

Section: Introductionmentioning

confidence: 99%

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Optimization of the bending stiffness of beam-to-column and column-to-foundation connections in precast concrete structures

Costa

Lima

Alva

et al. 2017

Rev. IBRACON Estrut. Mater.

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ResumoThis work involved the structural optimization of precast concrete rigid frames with semi-rigid beam-to-column connections. To this end, several frames were simulated numerically using the Finite Element Method. Beams and columns were modeled using bar elements and their connections were modeled using spring elements, with variable bending stiffness. The objective function was based on the search of the least stiff connection able to ensure the global stability of the building. Lastly, a connection model with optimal stiffness was adopted to design the frame. Semi-rigid beam-to-column connections with a constraint factors of 0.33 sufficed to ensure the maximum allowable horizontal displacement and bending moment of the connection, with a global stability parameter of 1.12. This confirms that even connections with low constraints generate significant gains from the structural standpoint, without affecting construction and assembly-related aspects.Keywords: numerical analysis, precast concrete, semi-rigid connections, structural optimization.Este trabalho trata da otimização estrutural de pórticos planos em concreto pré-moldado com ligações semirrígidas entre vigas e pilares. Alguns pórticos foram simulados numericamente através do Método dos Elementos Finitos. Vigas e pilares foram modelados por elementos de barra e suas ligações com elementos de mola deformável à flexão. A função objetivo baseou-se na busca da menor rigidez da ligação capaz de atender a estabilidade global da edificação. Um modelo de ligação com rigidez ótima foi adotado para compor o pórtico. Observou-se que ligações semirrígidas entre viga e pilar com fatores de restrição de 0,33 foram suficientes para atender o deslocamento horizontal máximo permitido e o momento solicitante da ligação, atingindo um parâmetro de estabilidade global de 1,12. Isto comprova que mesmo ligações com baixas restrições geram ganhos significativos do ponto de vista estrutural, sem prejuízos dos aspectos construtivos e de montagem.Palavras-chave: concreto pré-moldado, ligações semirrígidas, otimização estrutural.

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Research and development in precast concrete framed structures

Elliott

2000

Progress Structural Eng Maths

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Research work on precast concrete framed structures carried out over the past 20 years has culminated with the large-scale testing of a fivestorey frame in the USA, a pan-European project on the structural behaviour of frame connections, and the optimization of some highly engineered concrete elements. This paper reviews the most important advances, explaining to designers the relevance of the results of tests carried out on complete sway frames, on floor systems and connections subjected to gravity, horizontal and catenary forces, and on the wide-ranging developments of elements such as prestressed hollow core floor units. The design engineer now has more information, through full-scale experimental testing, realistic numerical studies and 3-dimensional nonlinear computer programs, to enable safer and more efficient design than ever before.Prog. Struct. Engng. Mater. 2000; 2: 405d428

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The Stability of Precast Concrete Skeletal Structures

Cited by 20 publications

References 3 publications

Performance of IBS Precast Concrete Beam-Column Connections Under Earthquake Effects: A Literature Review

Performance of IBS Precast Concrete Beam-Column Connections Under Earthquake Effects: A Literature Review

Optimization of the bending stiffness of beam-to-column and column-to-foundation connections in precast concrete structures

Research and development in precast concrete framed structures

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