建筑结构学报2024，Vol.45Issue(2)：63-73,11.DOI:10.14006/j.jzjgxb.2022.0937
受火后套筒灌浆连接装配式混凝土剪力墙抗震性能试验研究
Experimental study on seismic performance of prefabricated concrete shear walls connected with sleeve grouting post fire
摘要
Abstract
In order to study the seismic performance of prefabricated concrete shear walls with sleeve grouting connection after exposure to fire,low-cycle reversed loading tests were conducted on four prefabricated concrete shear walls with sleeve grouting connection after fire,one cast-in-place shear wall contrast specimen after fire and one prefabricated shear wall contrast specimen with sleeve grouting connection at room temperature.The effects of fire durations,concealed column setting and sleeve grouting connection form on the failure mode,bearing capacity,stiffness,ductility,and energy dissipation of sleeve grouting connected concrete shear walls were studied.The test results show that compared with the shear wall connected with sleeve grouting under room temperature,the phenomenon of concrete collapse occurs during the low cycle reciprocating quasi-static loading process of shear walls connected by sleeve grouting after exposure to fire.For the shear walls connected with sleeve grouting exposed to fire for 60 min and 113 min,the bearing capacity decreases by 4.68％and 13.15％,respectively.The displacement ductility coefficient decreases by 2.56％and 7.73％,respectively,and the initial stiffness decreases by 9.92％and 27.73％,respectively.Under the same fire exposure time,the presence of concealed columns has almost no effect on the bearing capacity of sleeve grouting connected concrete shear walls after exposure to fire,but can increase stiffness,ductility,and energy dissipation capacity.Compared with the cast-in-place shear wall,the bearing capacity of the sleeve grouting connected shear wall after exposure to fire for 113 min is reduced by 20.72％,the initial stiffness is reduced by 9.33％,and the displacement ductility coefficient is increased by 4.68％.The energy dissipation capacity is better than that of the cast-in-place shear wall before yielding,and is worse than that of the cast-in-place shear wall after yielding.关键词
装配式混凝土剪力墙/套筒灌浆连接/火灾后/拟静力试验/抗震性能Key words
prefabricated concrete shear wall/sleeve grouting connection/after exposure to fire/pseudo-static test/seismic performance分类
建筑与水利引用本文复制引用
郑家豪,李俊华,陈佳威,张振文..受火后套筒灌浆连接装配式混凝土剪力墙抗震性能试验研究[J].建筑结构学报,2024,45(2):63-73,11.基金项目
浙江省自然科学基金重点项目(LZ22E080002),宁波市自然科学基金重点项目(2022J068),福建省自然科学基金项目(2021J01541). （LZ22E080002）
