有限元模拟高延性混凝土加固砖墙抗震性能研究

Study on Seismic Performance of High-ductility Concrete Reinforced Masonry Structure with Finite Element Simulation

通过高延性混凝土加固和普通砂浆加固砌体试件的平面外低周往复荷载试验研究发现,高延性混凝土加固形式可以显著提升砖墙平面外抗弯承载力和变形能力。利用ABAQUS有限软件整体模型,选用合适参数对高延性混凝土面层加固试件的抗震性能进行数值分析,与试验结果进行对比。并在此有限元模型基础上,深入分析不同厚度的高延性混凝土加固层试件抗震性能。研究表明:本文建立的有限元模型分析结果与试验相似。随着砖墙的高延性混凝土加固层增厚,墙体平面外的承载能力和刚度随之增加,耗能性能也得到提高。

Through the off-plane low-cycle reciprocating load test of high-ductility concrete reinforcement and ordinary mortar-reinforced masonry specimens,it is found that the high-ductility concrete reinforcement form can significantly improve the out-of-plane bending bearing capacity and deformation capacity of brick wall.Using the overall model of ABAQUS limited software,the seismic performance of the high-ductility concrete surface reinforcement specimen was numerically analyzed by selecting appropriate parameters,and was compared with the test results.Based on this finite element model,the seismic performance of specimens with high-ductility concrete reinforcement layers of different thicknesses is analyzed.The results show that:analysis results of the finite element model established in this paper are similar to the experiments.With the thickening of the high-ductility concrete reinforcement layer of the brick wall,the bearing capacity and stiffness outside the plane of the wall increase,and the energy dissipation performance is also improved.