带暗支撑全再生混凝土低矮剪力墙的动力性能

为了解带暗支撑全再生混凝土低矮剪力墙的动力性能,进行了3个不同配筋率、不同配筋形式的低矮剪力墙振动台试验研究,其中1个为普通混凝土低矮剪力墙、1个为全再生混凝土低矮剪力墙、1个为带钢筋暗支撑全再生混凝土低矮剪力墙.在试验研究基础上,分析比较了各剪力墙在不同受力阶段的自振频率、加速度反应、位移反应和破坏特征;进行了有限元非线性时程反应分析,分析结果与试验结果符合较好.研究结果表明:全再生混凝土低矮剪力墙的自振频率比普通混凝土低矮剪力墙略低;通过增设钢筋暗支撑的方式可使全再生混凝土低矮剪力墙的抗震能力达到普通混凝土低矮剪力墙的抗震能力水平.

Dynamic Performance of Low-Rise Recycled Aggregate Concrete Shear Walls With Concealed Bracings

In order to ascertain the dynamic performance of the low-rise recycled aggregate concrete(RAC) shear wall with concealed bracings,the shaking table tests of three RC shear wall models,including a natural aggregate concrete shear wall and two RAC shear walls with or without concealed bracings,were carried out.The natural frequency,dynamic response of acceleration,response of displacement,as well as the failure patterns of three models at different loading stages were measured and compared on the basis of the tests.The finite element nonlinear time-history response analysis was also conducted,and the analysis results agreed well with the experimental results.The results show that the natural frequency of low-rise RAC shear walls is slightly lower than that of the natural aggregate concrete shear wall.The aseismic capacity of RAC shear wall is able to achieve the level as the natural aggregate concrete shear wall by setting up concealed bracings inside the wall.