Numerical analysis of the behavior of beam-column precast connections without continuity reinforcement
Abstract In this paper, the behavior of four beam-column connections in precast structures, without continuity reinforcement, subjected to negative bending moment was analyzed through numerical simulation using the ABAQUS®, which is based on the Finite Element Method. Nonlinear analysis was performe...
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Veröffentlicht in: | Revista IBRACON de estruturas e materiais 2021, Vol.14 (5) |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | Abstract In this paper, the behavior of four beam-column connections in precast structures, without continuity reinforcement, subjected to negative bending moment was analyzed through numerical simulation using the ABAQUS®, which is based on the Finite Element Method. Nonlinear analysis was performed initially with calibration using an experimental model found in the literature. The analysis showed that the filling of the beam-pillar interfaces with rigid material allows for greater stiffness and bond strength, exhibiting a secant rotational flexural stiffness at the beginning of the yield of the anchor at least 5.5 times greater than in models without filling. There are benefits in considering the rotational stiffness of this type of connection in precast single-storey or small height structures in relation to their stress distribution that provide greater competitiveness to precast structures.
Resumo Nesta pesquisa foi analisado o comportamento de quatro modelos de ligações viga-pilar em estruturas pré-moldadas, sem armadura de continuidade, submetidas a momento fletor negativo por meio de simulação numérica com a utilização do programa ABAQUS®, o qual é baseado no Método dos Elementos Finitos. A análise mostrou que o preenchimento das interfaces viga-pilar com material rígido proporciona maior rigidez e resistência à ligação, exibindo rigidez rotacional secante ao início do escoamento do chumbador pelo menos 5,5 vezes maior que em modelos sem o preenchimento. Considerar a rigidez desse tipo de ligação em projetos de estruturas pré-moldadas de um pavimento ou de pequena altura permite benefícios na distribuição de esforços das mesmas tornando-as mais competitivas. |
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ISSN: | 1983-4195 1983-4195 |
DOI: | 10.1590/s1983-41952021000500005 |