碳纤维布加固震损装配整体式混凝土框架节点抗震性能试验研究  

EXPERIMENTAL STUDY ON ASEISMIC PROPERTIES OF EARTHQUAKE-DAMAGED JOINTS FOR ASSEMBLED MONOLITHIC CONCRETE FRAMES STRENGTHENED WITH CARBON FIBER SHEETS

作　　者：杨曌[1] 凌之涵 叶蛟龙 刘锟 杨泉 周新 YANG Zhao;LING Zhihan;YE Jiaolong;LIU Kun;YANG Quan;ZHOU Xin(School of Urban Construction,Wuhan University of Science and Technology,Wuhan 430065,China;China Construction Yipin Investment&Development Co.,Ltd.,Wuhan 430058,China)

机构地区：[1]武汉科技大学城市建设学院,武汉430065 [2]中建壹品投资发展有限公司,武汉430058

出　　处：《工业建筑》2021年第7期185-193,共9页Industrial Construction

摘　　要：通过拟静力试验,研究碳纤维布加固震损装配整体式框架节点的抗震性能,分析了节点破坏形态、滞回曲线、骨架曲线、位移、延性、刚度和承载力退化等抗震性能指标,比较节点损伤程度对碳纤维布加固效果的影响,然后通过数值模拟对加固的影响因素进行分析,在此基础上建立了加固节点核心区抗剪承载力计算式。研究表明:碳纤维布加固节点试件极限承载力最大提高27.1%;极限位移最大提高23.8%;节点试件的耗能、延性增强,刚度退化、承载力退化减慢;轻度损伤节点加固后抗震性能得到有效提高;中度损伤节点加固后抗震性能可完全恢复;理论式计算结果与试验和模拟中的核心区抗剪承载力进行对比分析,误差在10%以内。Based on the quasi-static test,the aseismic properties of earthquake-damaged joints for assembled monolithic concrete frames strengthened with carbon fiber sheets were studied.The effects of failure modes,hysteretic curves,skeleton curves,displacement,ductility,degradation of stiffness and bearing capacity,and damage degrees on the aseismic performances of specimens reinforced by carbon fiber sheets were analyzed.On the basis of finite element simulations,the influence of different parameters on the strengthening effect,the formula for shear capacity of the core areas for reinforced joints was constructed.The results showed that the ultimate bearing capacity of joints strengthened with CFRP sheets could increase by 27.1%at most,the ultimate displacement could increase by at most 23.8%,the energy dissipation and ductility were enhanced,and the degradation of stiffness and bearing capacity for specimens were slowed down.The aseismic performances of the slightly damaged joints strengthened by CFRP sheets had been effectively improved,the moderately damaged joints of being strengthing had not been improved,but it could still be restored to the undamaged state.The shear capacity of the core area calcuatied by the theoretical formula were compared with that in tests and simulations,the errors were less than 10%.

关 键 词：装配整体式框架节点 碳纤维布加固 预损伤 抗震性能 

分 类 号：TU37[建筑科学—结构工程] TU352.11