柱脚耗能摇摆钢支撑结构滞回性能分析  

Hysteretic behavior analysis of energy dissipation swing steel braced structure with column base

作　　者：张鹏端 赵宝成[1] ZHANG Pengduan;ZHAO Baocheng(School of Civil Engineering,SUST,Suzhou 215011,China)

机构地区：[1]苏州科技大学土木工程学院,江苏苏州215011

出　　处：《苏州科技大学学报（工程技术版）》2024年第1期1-8,共8页Journal of Suzhou University of Science and Technology（Engineering and Technology Edition）

基　　金：国家自然科学基金项目(51878432)。

摘　　要：柱脚耗能摇摆钢支撑结构是一种具有可恢复功能的结构形式,具有良好的耗能能力,柱脚破坏后易于替换修复。采用ABAQUS有限元分析软件建立柱脚耗能摇摆钢支撑结构模型,耗能柱脚采用两种不同的构造形式,分析了结构在低周往复荷载作用下的滞回性能。分析结果表明:柱脚耗能摇摆钢支撑结构滞回曲线饱满,耗能能力强,变形能力好。耗能柱脚依靠耗能剪切板孔间短柱进入塑性耗能,剪切板孔间短柱端部为薄弱部位,加载过程中最先发生断裂;耗能柱脚耗能板孔间短柱宽度越大,耗能柱脚剪切板宽度越小、结构的跨度越大,构件的耗能能力越好,分析了柱脚耗能摇摆钢支撑结构的典型屈服机制,基于小变形假定,推导了屈服承载力计算公式,与有限元分析结果比较吻合较好,能较好地为实际工程提供依据。Energy-dissipating steel supported frame structure with column feet is a kind of recoverable structure with good energy dissipation capacity,and easy to replace and repair after column feet are damaged.In this paper,the finite element analysis software ABAQUS was used to establish the model of the steel support structure with energy-dissipating column feet.Two different structural forms of energy-dissipating column feet were used to analyze the hysteretic performance of the support structure under the action of low cyclic cyclic loads.The analysis results show that the steel frame supported by energy dissipation dissipation at column feet has full hysteresis curve,strong energy dissipation capacity and good deformation capacity.The foot of the energy dissipation column relies on the plate between the holes of the energy dissipation shear plate to enter the plastic energy dissipation.The end of the plate between the holes of the shear plate is the weak part,and the fracture occurs first in the loading process.The larger the width of the plates between the holes of the energy-dissipating column feet is,the smaller the width of the shear plate of the energy-dissipating column feet will be;the larger the span of the supporting frame is,the better the energy-dissipating capacity of the components will be.The typical yield mechanism of the energy-dissipating swing steel supporting structure was analyzed.Based on the assumption of small deformation,the calculation formula of the yield bearing capacity was derived,which is in good agreement with the finite element analysis results,and can provide a good basis for practical engineering.

关 键 词：耗能柱脚 剪切板 滞回性能 摇摆钢支撑 

分 类 号：TU391[建筑科学—结构工程]