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本文对预制剪力墙竖向接缝抗剪性能进行有限元分析。首先,将有限元模型计算结果与相关试验进行对比,从承载力、钢筋应变以及变形三个方面来验证有限元模型的可靠性。在此基础上,对竖向接缝处钢筋的抗剪性能进行分析,考虑到的变量为钢筋直径、混凝土有效厚度、混凝土强度和钢筋锚固长度。分析表明,在一定范围内,钢筋直径的增加有利于接缝处抗剪承载力的增加;在一定程度上,混凝土有效厚度的增加有利于钢筋抗剪承载力的发挥;混凝土强度的增加可以在一定程度上增加接缝处钢筋的抗剪承载力;竖向接缝处连接钢筋只需要一个基本的锚固长度,使得钢筋承受复杂的外力即可,过多地增加锚固长度并不能提高试件承载力。
In this paper, finite element analysis of the shear resistance of vertical joints in precast shear walls is carried out. First, the finite element model is compared with the related test results to verify the reliability of the finite element model from three aspects: bearing capacity, steel strain and deformation. On this basis, the shear performance of reinforced bar at vertical joint is analyzed. The variables considered are steel bar diameter, concrete effective thickness, concrete strength and steel bar anchorage length. The analysis shows that within a certain range, the increase of rebar diameter is beneficial to the increase of shear strength of joints; to some extent, the increase of effective thickness of concrete is beneficial to the bearing capacity of rebar; the increase of concrete strength can be found in To a certain extent, increase the shear strength of the rebar at the seams; only one basic anchor length is required to connect the rebar at the vertical seams so that the rebar can withstand complicated external forces. Too long an anchor length can not increase the bearing capacity of the specimen force.