建筑结构学报2025，Vol.46Issue(9)：44-57,14.DOI:10.14006/j.jzjgxb.2024.0493
复合加固震损装配式型钢混凝土框架抗震性能试验研究及损伤评估
Experimental study on seismic performance and damage assessment of earthquake-damaged prefabricated steel reinforced concrete frame with composite reinforcement
摘要
Abstract
To investigate the seismic performance and damage process of the earthquake-damaged prefabricated steel-reinforced concrete frame after reinforcement and repair,the beam ends of two earthquake-damaged prefabricated steel-reinforced concrete frames were reinforced with high-strength steel wire mesh,and the column bases were strengthened with inclined braces or steel-encased composite reinforcement.Low-cycle reversed cyclic tests were then conducted on these frames.The failure modes of the specimens were observed,and the seismic performance such as load-displacement hysteresis curve,skeleton curve,stiffness degradation,energy dissipation,strength degradation and inter-story displacement angle of each specimen before and after reinforcement were compared and analyzed.Finally,a cumulative energy dissipation damage assessment model suitable for prefabricated steel reinforced concrete frames was established.The results show that the failure modes of strengthened specimens are mainly characterized by crushing and spalling of high-strength grouting material,buckling of inclined support and outer steel.The hysteresis curve is full fusiform;the peak loads of frames with two reinforcement forms of inclined support and outer steel increased by 28.3％and 30.1％,respectively.Both specimens showed significant improvements in stiffness and energy dissipation capacity,with maximum increases of 45.8％and 41.8％,respectively.The strength degradation of both specimens showed a trend of increasing first and then decreasing.The ultimate inter-story displacement angles of the specimens are between 3/98 and 3/97,indicating strong collapse resistance.The cumulative energy dissipation-based damage assessment model for prefabricated steel reinforced concrete frames was proposed,and the calculation results were in good agreement with the experimental results.关键词
震损装配式型钢混凝土框架/高强钢丝布加固/斜支撑加固/外包钢加固/拟静力试验/抗震性能/损伤模型Key words
earthquake-damaged prefabricated steel reinforced concrete frame/high-strength steel wire mesh reinforcement/inclined support reinforcement/wrapped steel reinforcement/quasi-static test/seismic performance/damage model分类
建筑与水利引用本文复制引用
陈宇良,王双翼,朱真,叶培欢,陈宗平..复合加固震损装配式型钢混凝土框架抗震性能试验研究及损伤评估[J].建筑结构学报,2025,46(9):44-57,14.基金项目
国家自然科学基金项目(52368013,51908141),广西重点研发计划项目(桂科AB23075196),中国博士后科学基金(2021M693854). （52368013,51908141）
