建筑结构学报2024，Vol.45Issue(2)：217-225,9.DOI:10.14006/j.jzjgxb.2022.0587
装配式活性粉末混凝土叠合梁-高强混凝土柱节点抗震性能试验研究
Experimental study on seismic performance of prefabricated reactive powder concrete composite beam-high strength concrete column joints
摘要
Abstract
To improve the seismic performance of precast concrete beam-column joints,assembled integral reactive powder concrete(RPC)-high strength concrete(HSC)beam-column joints with additional steel bars in the joint core area and local post-pouring RPC at the beam end were proposed to achieve the plastic hinge relocation.Six full-size fabricated RPC composite beam-high strength concrete column exterior joints and an integral cast-in-place beam-column exterior joint were designed and fabricated for quasi-static tests,and the variables of specimens include the length of the additional reinforcement and the length of the local post-casting RPC at the beam end.The bearing properties,ductility,hysteretic properties,stiffness,energy dissipation capacity and failure modes of joints were studied.The test results show that the two kinds of plastic hinge relocation schemes realize the beam hinge energy dissipation mechanism.Compared with the integral cast-in-place exterior joint,the displacement ductility index and peak load of the exterior joint with additional bars are increased by 1.7％-10.3％and 11.64％-56.71％,respectively.The displacement ductility index of the local post-cast RPC specimens is increased by 7.8％-11.4％,and the peak load is increased by 9％-14％.When the method of local post-pouring RPC is used for plastic hinge transfer at the beam end,it is recommended that the length of the post-cast RPC at the beam end be 0.5 times the beam height.关键词
装配式梁柱节点/活性粉末混凝土叠合梁/高强混凝土柱/塑性铰外移/附加钢筋/后浇筑RPC/抗震性能Key words
fabricated beam-column joint/reactive powder concrete composite beam/high strength concrete column/relocation plastic hinge/additional steel bar/post-cast RPC/seismic performance分类
建筑与水利引用本文复制引用
王德弘,赵健,鞠彦忠,曾聪..装配式活性粉末混凝土叠合梁-高强混凝土柱节点抗震性能试验研究[J].建筑结构学报,2024,45(2):217-225,9.基金项目
国家自然科学基金项目(51878128),吉林省发展改革委员会项目(2021C038-5). （51878128）
