装配式混凝土剪力墙结构空间模型抗震性能试验

对装配式混凝土剪力墙结构底部四层1/2比例空间模型进行了低周反复荷载试验。根据试验结果及试件原型静力弹塑性分析结果对比分析认为:装配式混凝土剪力墙结构抗震性能满足我国抗震设防要求,同时,由于填充墙效应及局部现浇带的有效约束,结构承载力及刚度得到提高,且有较大安全余度,可应用于实际工程;装配式混凝土剪力墙结构由于采用与剪力墙板整体预制的钢筋混凝土填充墙,设计时应充分考虑填充墙对主体结构强度和刚度的影响;装配式混凝土剪力墙结构弹性强度及刚度较现浇剪力墙结构有明显提高,但同时造成其在弹塑性阶段表现复杂,有必要建立其精细化弹塑性模型进行地震作用下的详细分析。

RESEARCH ON SEISMIC PERFORMANCE OF A SPATIAL MODEL OF A NEW PRECAST CONCRETE SHEAR WALL STRUCTURE

Low-cyclic reversed load testing was carried out on a 1/2-scale four-story spatial model of the bottom of a new precast concrete shear wall structure. The test results are compared with the push-over analysis results of the prototype model to determine the seismic performance of the specimen. The new precast concrete shear wall structure, which meets the requirements of the current Chinese seismic fortification code and possesses excessive bearing capacity due to the effects of non-structural walls and effective confinement of local cast-in-situ regions, can be safely applied to practical engineering. As concrete infill walls prefabricated together with precast shear wall panels were used, it is necessary to pay sufficient attention to the effects of non-structural walls on the strength and stiffness of the main structure when designing according to current Chinese standards. Furthermore, the strength and stiffness of new precast concrete shear wall structure have been enhanced within the elastic phase, which has made its performance in the elastic-plastic phase complicated. Therefore, it is strongly recommended to perform detailed seismic effect analysis on a refined elastic-plastic model for this precast concrete shear wall structure.