套筒灌浆缺陷连接足尺预制混凝土柱抗震性能试验研究  

EXPERIMENTAL INVESTIGATION ON SEISMIC PERFORMANCE OF FULL-SCALE PRECAST CONCRETE COLUMNS CONNECTED USING SLEEVE WITH GROUTING DEFECTS

作　　者：解琳琳 钟勃健[2,3] 陈曦 苗启松[4,5] 刘谦敏 杨参天[2,3] 王心宇 XIE Lin-lin;ZHONG Bo-jian;CHEN Xi;MIAO Qi-song;LIU Qian-min;YANG Can-tian;WANG Xin-yu(Key Laboratory of Earthquake Engineering and Engineering Vibration,Harbin,Heilongjiang 150080,China;School of Civil and Transportation Engineering,Beijing University of Civil Engineering and Architecture,Beijing 100044,China;Multi-Functional Shaking Tables Laboratory,Beijing University of Civil Engineering and Architecture,Beijing 102616,China;Beijing Institute of Architectural Design,Beijing 100045,China;The Second Inspection Institute of Beijing Construction Engineering Quality Co.,Ltd.,Beijing 100045,China)

机构地区：[1]中国地震局工程力学研究所,黑龙江哈尔滨150080 [2]北京建筑大学土木与交通工程学院,北京100044 [3]北京建筑大学大型多功能振动台阵实验室,北京102616 [4]北京市建筑设计研究院有限公司,北京100045 [5]北京市建设工程质量第二检测所有限公司,北京100045

出　　处：《工程力学》2023年第8期68-76,共9页Engineering Mechanics

基　　金：中国地震局工程力学研究所基本科研业务费专项资助项目(2019D17);国家重点研发计划政府间国际创新合作项目(2019YFE0112800);北京建筑大学英才项目(JDYC20200306)。

摘　　要：灌浆套筒连接是预制混凝土结构最常用连接方式,灌浆不饱满缺陷是影响灌浆套筒连接柱抗震性能的主要因素。为明确不同缺陷率对该类柱抗震性能的影响,该研究考虑无灌浆缺陷、45%缺陷率和60%缺陷率三种情况,设计并制作了3个足尺预制柱进行低周往复拟静力试验,通过与无灌浆缺陷试件对比,分析套筒灌浆缺陷连接对柱构件破坏模式、滞回特征、延性等的影响。结果表明:不同于无缺陷试件的弯曲破坏特征和饱满滞回耗能特征,灌浆缺陷试件呈现出钢筋滑移破坏特征和捏拢滞回特征,延性变形系数为2.8~3.5,小于无缺陷试件的5.8。在发生钢筋滑移前,灌浆缺陷仅一定程度影响屈服荷载和峰值承载力。该研究的相关成果可为灌浆套筒连接预制混凝土结构的抗震性能研究提供参考。Grouted sleeve connection is the most widely used connection method for precast concrete(PC)structures,and the insufficient grouting is considered as the main factor affecting the seismic performance of PC columns using such connection.To investigate the influence of different defect ratios on the seismic performance of such columns,three PC columns with no defect,with defect ratios of 45%and,with defect ratios 60%were designed,manufactured and tested under the low-cyclic load.Through the comparison with the specimen without defect,the influences of defect ratios on the failure mode,on the hysteretic characteristics,and on the ductility were analyzed.The results indicated that the specimens with defects exhibited a bar-slip failure mode and hysteretic curves with pinching phenomenon,which is significant different from the flexural failure mode and ideal energy dissipation capacity of the specimen without defect.The coefficients of ductility range from 2.8 to 3.5 for the specimens with defect,which is much lower than that(i.e.,5.8)of the specimen without defect.Before the bar slip occurred,the insufficient grouting has a certain extent of influence on the yield load and peak load.The research outcome can provide a reference for the investigation on the seismic performance of PC structures using grouted sleeve.

关 键 词：预制柱 灌浆套筒连接 灌浆缺陷率 足尺试验 抗震性能 

分 类 号：TU375.3[建筑科学—结构工程]