不锈钢耗能板双层方钢防屈曲支撑滞回性能研究

任炜晨; 赵宝成; 徐伟栋; 路冰

doi:10.3724/j.gyjzG24052601

不锈钢耗能板双层方钢防屈曲支撑滞回性能研究

doi: 10.3724/j.gyjzG24052601

苏州科技大学土木工程学院, 江苏苏州 215011

基金项目:

国家自然科学基金项目（51878432）；江苏省研究生实践创新计划项目（SJCX23_1738）。

详细信息

作者简介:
任炜晨，硕士研究生，1476742961@qq.com。

通讯作者:
赵宝成，博士，教授，主要从事土木工程教学和科研工作，zhaobc@mail.usts.edu.cn。

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出版历程
- 收稿日期: 2024-05-26
- 网络出版日期: 2026-07-06

Research on the Hysteretic Behavior of Double-Square-Steel Tubular Buckling-Restrained Braces with Stainless Steel Energy Dissipation Plates

School of Civil Engineering, Suzhou University of Science and Technology, Suzhou 215011, China

摘要

摘要: 双层方钢防屈曲支撑是由耗能板和内外方钢焊接组成的新型耗能支撑，可有效避免防屈曲支撑端部薄弱破坏。为探究耗能板采用不锈钢的防屈曲支撑的滞回性能，采用低周往复加载试验结合有限元分析，研究了内置不锈钢耗能板的双层方钢防屈曲支撑的耗能性能。试验结果表明，此类支撑滞回曲线饱满，耗能能力强，变形能力好。轴向荷载作用下，支撑主要通过耗能板进入塑性耗能，加载过程中内外方钢整体始终保持弹性。对比同尺寸内置碳素钢Q235B耗能板的防屈曲支撑，内置不锈钢耗能板的防屈曲支撑的承载能力更高。为此，设计了四种不同耗能板布置方式的此类支撑算例，采用ABAQUS分析了耗能板布置方式对双层方钢防屈曲支撑滞回性能的影响，得到了此类支撑耗能板的最佳布置方式。在此最佳方式下开展了有限元参数分析，分析了耗能板耗能段中间和两端宽度、耗能板厚度对其滞回性能的影响。有限元分析表明：改变耗能板耗能段中间宽度对支撑承载能力、刚度和耗能能力的影响较大，改变耗能板耗能段两端宽度和耗能板厚度对支撑的影响较小。
- 双层方钢 /
- 防屈曲支撑 /
- 耗能板 /
- 不锈钢 /
- 滞回性能 /
- 有限元分析
Abstract: The double-square-steel tubular buckling-restrained brace is a novel type of buckling-restrained brace composed of welded energy dissipation plates，inner tubes， and outer tubes，which can effectively avoid weak damage at the ends of buckling-restrained braces. In order to explore the hysteretic behavior of buckling-restrained braces with stainless steel energy dissipation plates，the energy-dissipating behavior of the braces was studied through quasi-static loading tests and finite element analysis.The test results showed that this type of brace exhibited significant hysteretic behavior. Under axial loading，the brace mainly depended on the plates’ entering the plasticity stage to dissipate energy. During loading， the tubes remained elastic，but local buckling occurred on the surfaces of the outer tubes.Compared with braces of the same size made of carbon steel Q235B plates，this brace exhibited better strength. Four algorithms of different plate arrangements were designed in order to study the effect of plate arrangement on the hysteretic behavior of this type of brace using ABAQUS.The optimal plate arrangement was determined based on the study. A finite element parametric analysis was carried on the brace with the optimal plate arrangement，analyzing the effects of the middle and terminal widths of the dissipation section on the plates， as well as the plate thickness， on the hysteretic behavior of the brace.The FEM results showed that changing the middle width of the energy dissipation section on the plates had a greater effect on the strength， stiffness， and energy dissipation capacity of the braces， while changing the terminal width of the dissipation section and the plate thickness had a lesser effect on the braces.
- double-square-steel tube /
- buckling-restrained brace /
- energy dissipation plates /
- stainless steel /
- hysteretic behavior /
- finite element analysis

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