分级屈服耗能支撑框架结构滞回性能分析  

Hysteretic Behavior Analysis of Frame Structures with Graded Yielding Energy Dissipation Braces

作　　者：丁予铭 赵宝成[1] DING Yuming;ZHAO Baocheng(Jiangsu Key Laboratory of Structure Engineering,Suzhou University of Science and Technology,Suzhou 215011,China)

机构地区：[1]苏州科技大学江苏省结构工程重点实验室,江苏苏州215011

出　　处：《常熟理工学院学报》2023年第5期84-92,共9页Journal of Changshu Institute of Technology

基　　金：国家自然科学基金项目“新型板件耗能支撑受力机理及设计方法研究”(51875432)。

摘　　要：环形钢分级屈服耗能支撑由工字形传力支撑和端部金属阻尼器通过焊接连接组成.金属阻尼器由环形钢及内填弯曲板和剪切板构成,通过剪切板、弯曲板与环形钢先后屈服进入塑性耗能.本文将其放入框架结构中,利用ABAQUS有限元分析软件,分析耗能支撑框架结构在不同设计参数下的承载能力和滞回性能,明晰了其最优构造形式和工作机理.研究结果表明:环形钢剪切板分级屈服耗能支撑框架结构滞回曲线呈梭形,具备优秀的承载能力和耗能能力,能够实现分级屈服耗能目标.耗能剪切板的厚度、数量及弯曲板的厚度是影响支撑和框架各项性能的主要因素.剪切板和弯曲板越厚,结构的承载能力和变形能力越好.随着循环位移的加大,支撑在整体结构中的耗能占比逐步减小,但整体框架始终主要由支撑耗能.The ring steel graded yield energy dissipation support is composed of I-shaped load transfer support and end metal damper through welding connection.The metal damper is composed of ring steel,filled with bending plate and shear plate,which yield into plastic energy dissipation through shear plate,bending plate and ring steel successively.This research puts it into the frame structure and uses ABAQUS finite element analysis software to analyze the bearing capacity and hysteresis performance of the energy dissipation support frame structure under different design parameters,clarifying its optimal construction form and working mechanism.The research results indicate that the hysteresis curve of the circular steel shear plate graded yield energy dissipation support frame structure is shuttle shaped,and it has excellent bearing capacity and energy dissipation capacity,which can achieve the graded yield energy dissipation goal.The thickness and quantity of energy dissipation shear plates,as well as the thickness of bent plates,are the main factors affecting the performance of supports and frames:the thicker the shear and bending plates are,the better the load-bearing capacity and deformation capacity of the structure become.As the cyclic displacement increases,the proportion of energy consumption of the support in the overall structure gradually decreases,but the overall framework is always mainly consumed by the support.

关 键 词：分级屈服 钢框架 耗能支撑 耗能比 滞回性能 

分 类 号：TU391[建筑科学—结构工程]