地震工程学报2025，Vol.47Issue(3)：512-521,565,11.DOI:10.20000/j.1000-0844.20231114003
钢构套加固震损CFSST框架边节点地震损伤评估
Seismic damage assessment of damaged CFSST frame exterior joints strengthened by enveloped steel
摘要
Abstract
To evaluate the seismic damage of damaged concrete-filled steel square tubular(CFSST)frame exterior joints strengthened by enveloped steel,a numerical model was developed using finite element software ABAQUS based on prior experimental studies.Seismic damage was simulated using a material property reduction method,and an appropriate seismic damage model was employed to investigate the damage evolution mechanism of the joints.The study systemati-cally examined the effects of enveloped steel's strength,thickness,and non-core zone reinforce-ment height on the seismic bearing capacity of CFSST frame exterior joints.Results indicate the following:(1)The material property reduction method accurately replicates the effects of seismic damage.(2)Strengthening lightly and moderately damaged specimens with enveloped steel restores or even surpasses their original seismic performance.(3)Increasing the enveloped steel material strength from Q235 to Q345,Q390,and Q420 increases the joint's ultimate load capacity by 6.27％,10.57％,and 13.70％,respectively.Increasing the thickness of enveloped steel from 4 mm to 6 mm and 8 mm improved the ultimate load capacity by 4.02％and 9.68％,respectively.Extending the non-core zone reinforcement height of enveloped steel has a minimal effect on seis-mic capacity.Increasing the height from 200 mm to 400 mm improved the yield load and ultimate load by 0.86％and 4.56％,respectively.关键词
方钢管混凝土框架边节点/外包钢套加固/地震损伤评估/损伤模型/有限元分析Key words
concrete-filled steel square tubular frame exterior joints/steel-enveloped streng-thening/seismic damage assessment/damage model/finite element analysis分类
土木建筑引用本文复制引用
许成祥,廖泽瀚..钢构套加固震损CFSST框架边节点地震损伤评估[J].地震工程学报,2025,47(3):512-521,565,11.基金项目
国家自然科学基金项目(51178057) （51178057）
湖北省高等学校优秀中青年科技创新团队计划项目(T201303) （T201303）
