MRPC加固震损异形柱节点抗震性能研究  

Study on the seismic behavior of the frame joints of seismic damaged special-shaped columns reinforced by MRPC

作　　者：王欣[1] 周扬帆 王旗 张振 郑光明 WANG Xin;ZHOU Yangfan;WANG Qi;ZHANG Zhen;ZHENG Guangming(School of Civil Engineering, Shandong Jianzhu University. Jinan 250101,China;Tongyuan Design Group Co., Ltd.,Jinan 250101,China;Jinan Engineering Quality and Safety Center, Jinan 250101, China)

机构地区：[1]山东建筑大学土木工程学院,山东济南250101 [2]同圆设计集团有限公司,山东济南250101 [3]济南市工程质量与安全中心,山东济南250101

出　　处：《山东建筑大学学报》2021年第1期23-31,共9页Journal of Shandong Jianzhu University

摘　　要：改性活性粉末混凝土(MRPC)具有与混凝土粘结性好、高强度、高延性等特点,其加固后异形柱框架节点的抗震性能的研究,可为实际工程的加固改造提供参考。文章针对不同形式震损后的混凝土异形柱框架节点,设计了震损后装配式节点和震损后现浇节点试件,以MRPC替换原构件震损混凝土部分,采用足尺模型研究了对震损加固后异形柱框架节点在低周反复循环荷载作用下的抗震性能,并对比分析了震损前异形柱框架节点。结果表明:MRPC加固后与加固前的震损异形柱节点相比,其极限承载力、极限位移、刚度退化均有大幅度提升;MRPC材料能够极大地提高异形柱框架节点的耗能能力,且经其加固后的现浇和装配节点最终总耗能量分别为原试件的210%和188%。The modified active powder concrete(MRPC)has the characteristics of good bonding with concrete,high strength and high ductility,etc.The seismic behavior of the special-shaped column frame joints after MRPC reinforcement is studied,which can provide reference for the reinforcement and modification of practical projects in the future.According to different forms after earthquake damage of concrete special-shaped column frame joints,a group of prefabricated node specimen after earthquake damage and another group cast-in-situ node specimen after earthquake damage was designed.Seismic damage of concrete reinforcement ways to remove the original component parts change in MRPC,the full scale model of seismic damage of reinforced special-shaped columns frame under low reversed cyclic cycle load node to study the seismic behavior,and with earthquake damage of special-shaped column frame before node were analyzed.The results show that the ultimate bearing capacity,ultimate displacement and stiffness degradation greatly increase after MRPC reinforcement compared with those before the reinforcement.MRPC material can greatly improve the energy consumption capacity of the special-shaped column frame joints,and the final total energy consumption of the cast-in-place and assembly joints strengthened by MRPC material is 210%and 188%of that of the original specimens.

关 键 词：异形柱节点 震损加固 改性活性粉末混凝土 低周反复循环 抗震性能 

分 类 号：TU375[建筑科学—结构工程] TU528.572[建筑科学—建筑技术科学]