含套筒灌浆缺陷的装配式剪力墙结构抗震性能劣化规律研究

套筒连接灌浆缺陷给装配式建筑带来重大安全隐患。若将含缺陷建筑全部推倒重建，势必造成巨大的经济浪费。然而目前含套筒灌浆缺陷的结构性能劣化规律不明确，导致无法评估是否需要加固处理及如何加固处理。本项目旨在探究含套筒灌浆缺陷的装配式剪力墙结构的抗震性能劣化规律。通过高应力及大变形反复拉压试验，研究地震下含缺陷的灌浆套筒连接接头的破坏机理及性能劣化规律；建立能够评估含缺陷套筒连接接头的力学性能劣化程度及失效概率的理论模型；通过低周反复加载试验及大量数值模拟，探究含套筒灌浆缺陷的装配式剪力墙墙片的破坏机理及抗震性能劣化规律；建立装配式剪力墙在不同的缺陷率及缺陷分布下承载力、刚度、延性、耗能等的劣化评估理论模型；探究含套筒灌浆缺陷的装配式剪力墙结构的地震易损性规律，建立其地震损伤失效概率计算模型；提出含套筒灌浆缺陷的装配式剪力墙结构的地震易损性评估方法。为完善工业化建筑抗震性能评估体系提供理论支撑。

The grouting defects in sleeve splicings pose threats to the safety of assembled buildings. It is costly to demolish and rebuild all the defective buildings . However, the deterioration law of the structural performance with sleeve grouting defects is still unclear, which makes it impossible to evaluate whether the reinforcement treatment is needed or not and how to reinforce it. This project aims to explore the seismic performance deterioration law of the assembled shear wall structures with sleeve grouting defects. The failure mechanisim and performance deterioration law of the grouting sleeve connections with defects under earthquakes will be studied by conducting the repeated tension and pressure tests with high stress and large deformation. A theoretical model will be established to evaluate the deterioration degree and failure probability of the mechanics performance of the sleeve connections with grouting defects. By conducting the low cycle repeated loading tests and a large number of numerical simulation, the failure mechanism and seismic performance deterioration law of the assembled shear walls with sleeve grouting defects will be investigated. A theoretical model for evaluating the deterioration of the carrying capacity, stiffness, ductility and energy dissipation of the assembled shear walls with different defect levels and distribution conditions will be established. The seismic fragility of the assembled shear wall structures with sleeve grouting defects will be explored. The failure probability calculation model of the structural seismic damage will be established. A seismic fragility assessment method for the assembled shear wall structures with sleeve grouting defects will be finally proposed. This research provides theoretical support for the seismic performance evaluation of the industrialized structures.