基于核心单元削弱的分形防屈曲支撑不同参数性能研究  

Study on the performance of different parameters of fractal dimension-buckling restrained brace based on core elements weakening

作　　者：任玉博 罗小博 马路超 Ren Yubo;Luo Xiaobo;Ma Luchao(School of Civil Engineering,Qinghai University,Xining 810016,China;Key Laboratory of Energy-saving Building Materials and Engineering Safety of Qinghai,Xining 810016,China)

机构地区：[1]青海大学土木水利学院,青海西宁810016 [2]青海省建筑节能材料与工程安全重点实验室,青海西宁810016

出　　处：《建筑科学》2024年第11期101-112,共12页Building Science

基　　金：青海省科学技术厅项目(2024-ZJ-975)。

摘　　要：防屈曲支撑在轴向荷载作用下具有稳定的滞回性能、良好的耗能能力和低周疲劳性能,在新建或既有钢筋混凝土框架结构加固中应用广泛。目前使用较多的仍是传统防屈曲支撑,但因其自重大、更换困难及维护成本高等缺点,使得众多学者对新型防屈曲支撑的研究逐渐深入,其中结合分形Mandelbrot函数,利用MATLAB研究出的新型分形防屈曲支撑较传统防屈曲支撑性能更为优越。本文基于上述新型分形防屈曲支撑,对其核心单元进行削弱,通过ABAQUS软件进行建模,对不同参数组合的分形防屈曲支撑进行性能对比,设计出性能更优的分形防屈曲支撑。Buckling restrained brace has stable hysteresis,good energy dissipation capacity and low circumferential fatigue performance under axial loads,and it is widely used in the reinforcement of existing reinforced concrete frame structures.At present,the traditional buckling restrained brace is still used more,but its self-importance,replacement difficulties and maintenance costs and other shortcomings,so that many scholars on the new type of buckling restrained brace gradually in-depth research,which combined with the fractal Mandelbrot function,the use of MATLAB to study the new type of fractal dimension-buckling restrained brace is more superior than the traditional buckling restrained brace effect.In this paper,based on the above new fractal dimension-buckling restrained brace,the core elements is weakened,and the modeling analysis is carried out by ABAQUS software,the performance of fractal dimension-buckling restrained brace with different combinations of parameters is compared,so as to design the better performance of the fractal dimension-buckling restrained brace.

关 键 词：结构加固 分形防屈曲支撑 核心单元削弱 不同参数组合 

分 类 号：TU323.2[建筑科学—结构工程]