装配式剪力墙竖向分布钢筋连接程度研究进展

State of the Art in Connection of Vertically Distributed Reinforcements for Precast Shear Wall

装配式剪力墙结构是我国高层住宅常用的结构形式之一,其可靠的竖向连接是保证结构安全的关键.按照竖向分布钢筋在楼层处连接数量(连接程度)不同,装配式剪力墙竖向连接可分为全部连接、部分连接和不连接3种.基于国内外相关的研究成果,系统总结了3种连接程度装配式剪力墙的竖向分布钢筋连接形式、构造特点与受力性能,并深入分析了竖向分布钢筋连接程度对剪力墙抗震性能影响,全面梳理了其研究存在的不足.在此基础上,提出基于剪力墙截面受压、受剪承载力等效原则的一种竖向分布钢筋不连接边缘构件现浇装配式剪力墙结构,并给出相关设计计算方法.最后对装配式剪力墙新型连接技术与无损检测技术等方面做出了展望,并指出竖向分布钢筋不连接装配式剪力墙结构是未来更具前景发展方向之一.

Precast concrete shear wall structure is one of the most common structures for China’s high-rise residential buildings.Reliable vertical connection is critical for the structure to ensure safety.According to the number of vertically distribution reinforcement connections or lap joints(connection degree)on the floor,the vertical connection for precast shear wall can be divided into three forms:full connection,partial connection and no connection.Based on relevant research,for three kinds of connection degrees of precast shear wall,the connection form of vertically distributed reinforcements,structural characteristics and mechanical properties are systematically summarized.Then the influence of the vertically distributed reinforcement connection on the seismic performance of the shear wall and the deficiencies of the current research are analyzed.Further,based on the principle of equivalent bending and shear resistance,a new shear wall structure with non-connected vertical distribution reinforcement is proposed,and its design calculation method is presented.Finally,the new connection technology and nondestructive testing technology for precast shear wall are predicted,and it is pointed out that the precast shear wall structure with non-connected vertically distributed reinforcements is more promising in the future.