分形防屈曲支撑核心单元菱形开孔构造设计及性能研究  

Design and performance study of diamond-shaped openings structure of fractal buckling restrained brace core unit

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

机构地区：[1]青海大学土木水利学院,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：《青海大学学报》2024年第5期78-85,共8页Journal of Qinghai University

基　　金：青海省科学技术厅项目(2024-ZJ-975)。

摘　　要：为精确判断防屈曲支撑发生屈服时核心单元的破坏位置,结合Mandelbrot分形函数构造一种新型分形防屈曲支撑核心单元菱形开孔构件,应用ABAQUS软件绘制分形防屈曲支撑菱形开孔和分形防屈曲支撑未开孔构件模型,通过应力云图、位移云图和滞回曲线对比分析各构件的耗能性能,并结合试验选出最优防屈曲支撑构件。结果表明:分形防屈曲支撑核心单元菱形开孔节点连接处应力和位移较小,但随着作用力增加,核心单元开孔部位逐渐发生屈服直至破坏;在受压阶段,滞回曲线类似于受拉阶段,曲线更加饱满,耗能效果更佳。In order to accurately judge the failure position of core unit when the buckling restrained brace occurs, a new fractal buckling restrained brace with diamond-shaped openings of core unit is constructed by combining the Mandelbrot fractal function. The software ABAQUS is used to draw the models of fractal buckling restrained braces with diamond-shaped openings and without openings. The stress nephogram, displacement nephogram and hysteretic curve are compared to analyze the energy consumption performance of each component, and the optimal buckling restrained brace component is selected by experiments. The results are as follows: The stress and displacement at the node of diamond-shaped openings of fractal buckling restrained brace core unit are relatively small, but as the applied force increases, the opening part of core unit gradually yields until it fails. In the compression stage, the hysteretic curve is similar to the tension stage, with a fuller curve and better energy consumption effect.

关 键 词：菱形开孔 分形 防屈曲支撑 耗能 结构加固 

分 类 号：TU323.2[建筑科学—结构工程]