基于有限元模型的钢管混凝土抗扭机理及梁桥地震扭转反应
Mechanism of Concrete Filled Steel Tube Subjected to Torsion and Multi-Scale Finite Element Model
摘要: 为了进一步研究钢管混凝土柱在压–弯–扭复杂受力状态下的抗扭机理，基于大型通用有限元程序ABAQUS中建立的“壳–实体”精细有限元模型，对分析结果进行了深入的分析和探讨，包括钢管混凝土柱在纯扭、压扭、弯扭等荷载作用下的钢管和内填混凝土中主应力、主应变的分布和变化情况，揭示了钢管混凝土柱在抗扭时的工作机理。运用桥梁结构的多尺度建模方法，建立了曲线钢–混凝土组合梁桥的多尺度有限元模型进行弹塑性时程分析，并与纤维梁杆系模型的计算结果进行了对比，结果表明采用多尺度有限元模型进行桥梁结构整体的变形计算时能够有效预测结构的整体扭转效应。
Abstract: In order to make further study on the torsion mechanism of concrete filled steel tube columns, based on the “shell-solid” finite element model in the general finite element program ABAQUS, the analytical results were comprehensively discussed, including the distribution and development trend of the principal stress, principal strain of the steel tube and in-filled concrete of concrete filled steel tube columns subjected to compression-bending-torsion combined load. Using the multi-scale finite element modeling method, the multi-scale model of curved steel-concrete composite girder bridge was built, and the elasto-plastic time-history analysis was made, compared with the fiber beam-column model. The results showed that the global torsion behavior of curved girder bridge could be predicted effectively by the multi-scale finite element model.
文章引用：彭媛媛. 基于有限元模型的钢管混凝土抗扭机理及梁桥地震扭转反应[J]. 土木工程, 2018, 7(1): 56-61. https://doi.org/10.12677/HJCE.2018.71008

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