自复位预应力剪力墙抗震性能实体和平面单元有限元分析

发布时间：2018-05-30 06:20

本文选题：自复位剪力墙 + 无黏结预应力　；参考：《建筑结构学报》2014年05期

【摘要】：自复位剪力墙结构是墙体底部与基础间无竖向钢筋贯通,而采用无黏结预应力筋将墙体与基础相连接的结构形式,也是可恢复建筑功能结构体系中的重要组成部分。剪力墙在承受侧向荷载时墙体底端角部抬升,并依靠重力荷载和无黏结预应力筋提供恢复力。采用ABAQUS软件对一个自复位剪力墙的伪静力试验进行实体单元、平面应力单元及薄壳单元的有限元模拟并与试验结果对比,同时对三种单元的计算效率和精度进行对比。结果表明:有限元模拟方法能较好地反映自复位预应力剪力墙的滞回性能、无黏结预应力筋的应力和混凝土的应变等各项指标。验证了在动力显式分析中采用壳单元进行结构模拟的可行性和合理性。
[Abstract]:Self-reposition shear wall structure is a kind of structure with no vertical reinforcement between the base and the bottom of the wall, and it is an important part of the functional structure system of the building that the wall is connected with the foundation by using the unbonded prestressed tendons. When the shear wall is subjected to lateral load, the bottom corner of the wall is raised, and the restoring force is provided by gravity load and unbonded prestressed tendons. The finite element simulation of a pseudostatic test of a self-reset shear wall is carried out by using ABAQUS software. The finite element simulation of the plane stress element and the thin shell element is carried out and compared with the experimental results. At the same time, the computational efficiency and accuracy of the three elements are compared. The results show that the finite element simulation method can well reflect the hysteretic behavior of self-reset prestressed shear wall, the stress of unbonded prestressed tendons and the strain of concrete, and so on. The feasibility and rationality of structural simulation with shell element in dynamic explicit analysis are verified.
【作者单位】：同济大学土木工程防灾国家重点实验室;
【基金】：国家自然科学基金重大国际合作项目(51261120377)
【分类号】：TU398.2;TU311.3

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