外套整体式加固砌体结构抗震性能试验研究

通过对一栋足尺5层砌体结构住宅模型实施外套整体式加固,梳理、总结该加固方法的工艺流程.为了考察加固结构在纵墙方向的整体抗震性能,对试验模型进行了多轮次拟静力和拟动力试验.依据试验结果对外套加固结构震前、震后纵墙方向的抗震性能进行了评估.试验及评估结果显示:加固后的钢筋混凝土剪力墙-砌体墙混合结构的抗侧刚度明显提升,抗震...

EXPERIMENTAL STUDY OF A MASONRY BUILDING RETROFITTED INTEGRALLY BY PRE-FABRICATED RC PANELS

The technological process was summarized by applying jacket retrofitting technology on a full-scaled substructure model of a five-story masonry residence. In order to evaluate the seismic performance of the retrofitted structure in longitudinal direction, series of lateral loads, whether quasi-statistic or pseudo-dynamic, were applied on the model. The seismic performance of the longitudinal lateral resistant system before and after earthquakes were assessed based on the experimental results. It demonstrates that the lateral stiffness of the strengthened reinforced concrete shear wall & masonry wall composite structure has an obvious improvement, the composite structure behaves more like RC shear wall structure; the failure mode is controlled by masonry structure after a decrease of the integrity of the jacket-retrofitting units; the strengthened composite structure has adequate redundancy when encountering an overfortification level earthquake; the damaged structure can still overcome another extremely rare earthquake without any collapse. It can be proved that the seismic performance of masonry dwellings retrofitted with PC panel jacket units will improve dramatically.