自复位装配式预应力钢框架体系理论分析与试验验证  

THEORETICAL ANALYSIS AND EXPERIMENTAL VERIFICATION OF SELF-CENTERING FABRICATED PRESTRESSED STEEL FRAME SYSTEM

作　　者：张艳霞 程啸天[1] 李杨龙 杨峥 李振兴 ZHANG Yan-xia;CHENG Xiao-tian;LI Yang-long;YANG Zheng;LI Zhen-xing(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)

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

出　　处：《工程力学》2023年第12期175-184,共10页Engineering Mechanics

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

摘　　要：该文对一种新型自复位装配式预应力钢框架体系进行理论分析,主要从钢绞线索力、自复位节点受力变化过程的各个状态进行分析阐述,推导出初始转动中心位置、钢绞线变化长度、钢绞线索力及不同状态下外荷载的理论计算公式;通过分析自复位节点理论滞回曲线及自复位框架荷载-位移曲线,进一步推导出自复位节点耗能系数与节点开口前后框架刚度比值的理论计算公式,并对荷载-位移曲线中每段过程进行分析说明;将自复位框架试验中的节点开口荷载、耗能系数、自复位节点开口前后框架刚度比值与理论计算值进行对比,结果表明试验值与理论值基本相等,故理论分析是合理的,能够很好地预测和解释试验现象及结果,且理论公式具有较高的精确性,可为后续工程应用提供理论基础。Focused is on the theoretical analysis of a new type of self-resetting prestressed steel frame system,upon analyzing and expounding the various states of the change process of the wire force of the steel strand and the force of the self-centering joint,to deduce the theoretical calculation formula of the initial rotation center position,of the changing length of the steel strand,of the wire force of the steel strand and,of the external load under different states.By analyzing the theoretical hysteresis curve of the self-centering joint and the loaddisplacement curve of the self-centering frame,it is further deduced for the theoretical calculation formula of the ratio of the energy dissipation coefficient of the self-centering joint to the stiffness of the frame before and after the opening of the joint,and each process in the load-displacement curve is analyzed and explained.The opening load,energy dissipation coefficient,and stiffness ratio of frame before and after opening of self-centering joints in the self-centering frame test were compared with the theoretical calculation value.The results show that:the experimental value is basically equal to the theoretical value,thusly the theoretical analysis is reasonable,which can predict and explain the experimental phenomena and results well,and the theoretical formula has high accuracy,providing a theoretical basis for subsequent engineering applications.

关 键 词：钢框架 自复位节点 理论分析 摩擦耗能 试验验证 

分 类 号：TU311.4[建筑科学—结构工程]