梁柱节点弯剪型可更换耗能件抗震性能数值分析  

Numerical analysis on seismic performance of flexural-shear replaceable energy dissipators at the beam-column joint

作　　者：梁刚[1,2] 陈江 李淑敏 卢俊龙 LIANG Gang;CHEN Jiang;LI Shumin;LU Junlong(State Key Laboratory of Water Engineering Ecology and Environment in Arid Area,Xi’an University of Technology,Xi’an 710048,China;School of Civil Engineering and Architecture,Xi’an University of Technology,Xi’an 710048,China)

机构地区：[1]西安理工大学旱区水工程生态环境全国重点实验室,陕西西安710048 [2]西安理工大学土木建筑工程学院,陕西西安710048

出　　处：《地震工程与工程振动》2025年第2期173-182,共10页Earthquake Engineering and Engineering Dynamics

基　　金：国家自然科学基金项目(52379133);中国博士后科学基金项目(2022M712562);陕西省自然科学基础研究计划项目(2020JQ-628,2023-JC-YB-309);陕西省教育厅项目(21JK0795)。

摘　　要：带可更换耗能件的梁柱节点具有震后修复方便、经济等优势,针对一种构造简单、施工方便,耗能能力稳定和拉压力学性能一致的弯剪型可更换耗能件,建立了该类耗能件的精细化有限元模型,分析了其破坏模式、滞回曲线、骨架曲线以及应力分布状态,考虑可更换耗能件肢柱高宽比、宽厚比以及耗能区整体长细比等参数影响,系统探讨了其对耗能件骨架曲线、刚度以及等效黏滞阻尼系数等的影响规律。结果表明:当耗能件肢柱高宽比大于4.0时,肢柱易产生屈曲行为,建议肢柱高宽比阈值为1.3~4.0;随着耗能肢柱宽厚比的增加,试件的初始刚度和承载力均呈现降低趋势,建议肢柱宽厚比不宜大于2.5;当耗能区长细比较大时,其面外稳定性降低,耗能能力减弱,建议削弱区长细比不超过48;当肢柱高宽比小于1.0、大于2.5时,弯剪型耗能件屈服强度理论预测值与有限元计算值误差较大,后者分别比前者高约35%和32%,需对理论强度预测模型进一步研究,以提高其预测精度。研究成果可为该类弯剪型耗能件抗震设计提供参考。The beam-column joint with replaceable energy dissipators has the advantages of convenient and economical repair after an earthquake.For a bending shear replaceable component with simple structure,easy construction,stable energy consumption capacity,and consistent tensile and compressive mechanical properties,a refined finite element model of flexural-shear replaceable energy dissipators was established.Then,the failure mode,hysteresis curve,skeleton curve and stress distribution state of the component were analyzed.The influence of parameters such as height-width ratio,width-thickness ratio of limb columns for replaceable energy dissipators,and overall slenderness ratio of energy dissipation zone was considered,and the effects on skeleton curves,stiffness and equivalent viscous damping coefficient of energy dissipators were systematically discussed.The analysis results showed that when the height-width ratio of limb columns in energy dissipators was greater than 4.0,the limb columns were prone to buckling behavior,and the recommended threshold value of the height-width ratio is 1.3~4.0.Increasing the width-thickness ratio of the energy dissipators decreases the initial stiffness and bearing capacity of the specimen,and it was recommended that the width-thickness ratio of limb columns should be no more than 2.5.When the slenderness ratio of the energy dissipation zone was large,its out-of-plane stability and energy dissipation capacity would be weakened,it is suggested the slenderness ratio of the energy dissipation zone not exceed 48.When height-width ratio of limb columns were less than 1.0 and greater than 2.5,the error between the theoretical prediction and the finite element calculation of the yield strength for flexural-shear replaceable energy dissipators was large,the latter was about 35%and 32%higher than the former respectively,so further research on the theoretical strength prediction model is needed to improve its prediction accuracy.The research results can provide reference for the seismic design of

关 键 词：带缝钢板阻尼器 有限元分析 滞回行为 高宽比 宽厚比 

分 类 号：TU352[建筑科学—结构工程]