水平拼缝预制钢筋混凝土剪力墙抗震性能分析

Seismic analysis of precast concrete shear wall with horizontal seam

为了进一步了解装配式混凝土剪力墙结构的抗震性能和水平拼缝对墙体受力性能的影响,在已有试验基础上,采用非线性有限元软件Msc.Marc对1个现浇剪力墙试件和1个带水平拼缝的预制装配式试件进行了单调水平荷载作用下的拟静力分析。在验证了有限元模型准确性的基础上,分析了不同轴压比、插筋强度、直径和根数以及连接筋长度对预制墙体承载能力、刚度和变形能力的影响。计算结果表明,有限元分析所得荷载-位移曲线与试验结果吻合良好,说明所建有限元模型可以较好地模拟实际情况;轴压比增大,承载能力和刚度变大;改变拼缝处连接筋的配置情况,试件的变形能力有所改变,承载能力没有明显影响。在水平拼缝处有可靠连接构造的情况下,预制装配式剪力墙结构具有良好的抗震性能。

In order to further understand the seismic performance of precast concrete shear wall and the effect of horizontal seam,on the basis of existing experimental results,nonlinear finite element analysis was conducted for a cast-in-situ concrete shear wall and a precast concrete shear wall with horizontal seam under monotonic loading.Based on the correctness of the finite element model,analyzing the effect of axial compression ratio,steel strength,diameter or number and length on carrying capacity,stiffness or deformation capacity.The results show that the finite element analysis of the load-displacement curve is in good agreement with the test results,and the finite element model can well simulate the actual situation.when the axial compression ratio increases,the load capacity and stiffness increase.Different connecting configurations will affect the deformation capacity and the carrying capacity.Precast concrete shear wall has high seismic performance,if there is structural reliability at the horizontal seam.