【摘要】 基于抗震性能设计需求,提出一种新型自复位变摩擦耗能支撑,该支撑兼具传统自复位支撑自复位和耗散能量功能的同时,可以根据所受荷载的大小实时地改变自身输出摩擦力的大小;介绍了自复位变摩擦耗能支撑的结构构造和工作原理,给出了支撑全阶段理论力学模型;并基于有限元开源平台OpenSees,开发了支撑材料的本构模型,详细阐述了在软件内完成支撑材料有限元实现的思路和方法;基于开发模型模拟支撑杆件力学滞回性能,对比试验结果,各工况下模拟结果和试验结果都高度吻合,表明新材料模型能够较好地模拟自复位变摩擦耗能支撑的力学性能,满足对支撑以及该类型材料在工程结构应用中的有限元分析。更多还原

【Abstract】 Based on the design requirements of seismic performance,a new self-centering variable friction energy dissipative brace(SCVFB) is proposed.The brace has the functions of traditional brace self-centering and dissipate energy,and can change its output friction force in real time according to the magnitude of the load.The structural construction and working principle of self-centering variable friction energy dissipative brace are introduced,and the theoretical mechanical model of brace is given.Based on OpenSees,a finite element open source platform,this article develops a constitutive model of supporting materials,and elaborates the ideas and methods for implementing finite element implementation of brace materials in software;The mechanical hysteretic behavior of the supporting members was simulated based on the development model,and compared with the experimental results.The simulation results are in good agreement with the experimental results,indicating that the new material model can better simulate the mechanical properties of self-centering variable friction energy dissipative brace and satisfy the finite element analysis of the brace and the material in the engineering structure application.更多还原