后张拉预应力装配剪力墙抗震性能有限元分析

Finite Element Analysis of Aseismic Behaviors of Assembly Shear Wall under Post-tensioned Pre-stress

以既有试验研究成果为参考,通过有限元分析方法,研究了预应力大小对采用预应力连接的一层、二层预制装配剪力墙单元受力性能的影响,并通过与现浇剪力墙的比较分析了预应力预制装配式剪力墙的承载能力、刚度退化、变形能力及耗能能力.利用Abaqus有限元分析软件:其中混凝土采用三维实体单元模拟,普通钢筋和钢绞线采用空间二节点直线桁架单元模拟.通过模拟分析低周反复荷载下墙体的受力性能,得出预应力预制装配剪力墙有较强的刚度和承载能力,虽耗能能力和变形能力有所下降,但同等条件下与现浇剪力墙差别不大.

Based on the results of the existing experimental research, the effect of effective pre-stress on the mechanical properties of one-layer and two-layer precast shear wall models with pre-stress connection was studied by means of finite element analysis. The bearing capacity, stiffness degeneration, deformability and energy-dissipation capacity of pre-stressed precast assembled shear wall were analyzed by comparing with the cast-in-place shear wall. The Abaqus finite element analysis software was used with the simulation of the concrete by three-dimensional solid element, the ordinary steel and steel strand by two-node linear truss unit in space. By simulating and analyzing the mechanical behavior of the wall under the low cycle load, it is concluded that the pre-stressed precast assembly shear wall has strong stiffness and bearing capacity.Although the energy-dissipation capacity and the deformability slightly decrease, they are not very different from the cast-inplace shear wall under the same condition.