半刚接柱脚自复位装配式钢框架拟动力试验研究  

Pseudo-Dynamic Test for a Self-centering Prefabricated Steel Frame with Semi-rigid Column Base

作　　者：张艳霞 沈森[1] 李杨龙 赵微 ZHANG Yanxia;SHEN Sen;LI Yanglong;ZHAO Wei(School of Civil and Transportation Engineering,Beijing University of Civil Engineering and Architecture,Beijing 100044,China;Beijing Energy Conservation&Sustainable Urban and Rural Development Provincial and Ministry Co-construction Collaboration Innovation Center,Beijing University of Civil Engineering and Architecture,Beijing 100044,China;Beijing Higher Institution Engineering Research Center of Structural Engineering and New Materials,Beijing University of Civil Engineering and Architecture,Beijing 100044,China)

机构地区：[1]北京建筑大学土木与交通工程学院,北京100044 [2]北京建筑大学北京节能减排与城乡可持续发展省部共建协同创新中心,北京100044 [3]北京建筑大学工程结构与新材料北京市高校工程研究中心,北京100044

出　　处：《建筑钢结构进展》2024年第6期22-32,共11页Progress in Steel Building Structures

基　　金：国家自然科学基金(51778036);北京市教委科研计划(KZ201910016018);长江学者和创新团队发展计划(IRT_17R06)。

摘　　要：为解决刚接柱脚自复位装配式钢框架结构在中震或大震下底层柱可能发生较大的塑性变形的问题,设计一种半刚接柱脚自复位装配式钢框架结构。对其子结构进行拟动力试验,对比框架在Taft地震波、LOS000地震波和El-Centro地震波输入及不同等级地震下的节点开口、耗能能力、刚度退化、预应力损失和应变变化。试验结果表明,钢框架在大震作用下具有良好的自复位功能和耗能能力。钢绞线平均预应力损失最多仅为1.58%,说明施加预应力的方法是可靠的。钢框架柱脚能够始终保持弹性状态,因此震后仅需修复钢梁,大大降低了修复成本。In order to solve the problem that large plastic deformation may occur at the bottom column of self-centering prefabricated steel frame structure with rigid column base under precautionary earthquake or rare earthquake,a self-centering prefabricated steel frame structure with semi-rigid column base was designed.The pseudodynamic test was conducted on the substructure of the designed frame to compare the joint openings,energy dissipation capacity,stiffness degradation,prestress loss and strain changes of the frame under different levels of earthquakes with Taft,LOS000,and El-Centro waves.The test results show that the steel frame has good self-centering function and energy dissipation capacity under rare earthquake.The average prestress loss is only 1.58%at most,indicating that the application of prestress method in steel strands is reliable.The column base of the steel frame can remain elastic state,so that only the steel beam needs to be repaired after theearthquake,greatly reducing the repair cost.

关 键 词：半刚接柱脚 钢框架 拟动力试验 自复位功能 预应力损失 

分 类 号：TU391[建筑科学—结构工程]