高强混凝土框架结构中节点抗震性能  

Seismic behavior of interior joints of high-strength concrete frame structure

作　　者：魏春明[1] 尹景耀 赵星海[2] 赵强[1] 陈建华[1] 

机构地区：[1]东北电力大学建筑工程学院,吉林吉林132012 [2]东北电力大学能源与动力工程学院,吉林吉林132012

出　　处：《哈尔滨工业大学学报》2015年第10期124-128,共5页Journal of Harbin Institute of Technology

基　　金：国家自然科学基金(51478094);吉林省教育厅"十二五"科学技术研究资助(2013109)

摘　　要：为研究高强混凝土框架结构中节点的抗震性能,对10根留有施工缝的高强混凝土框架结构中节点进行了低周反复抗震性能试验.研究了轴压比、节点核心区混凝土的强度等级、柱中混凝土在梁中的延伸长度等对梁柱中节点抗震性能的影响,对构件的破坏特征、承载能力、延性性能、滞回曲线进行了对比分析.研究结果表明:所有试验构件均为梁端受弯破坏;柱中混凝土在梁中的延伸长度对滞回曲线的形态、屈服荷载和最大荷载都没有显著影响,但是对节点的延性性能影响比较大.根据试验结果和分析,并考虑到实际施工因素,取用1.5h为柱中高强混凝土延伸到梁中的最佳延伸长度.To study the seismic behavior of interior joints of high-strength concrete frame structure,10 interior joints with construction joints of high-strength concrete frame structure are carried out based on the low-cycle loadings test. The influences of the axial compression ratio,concrete strength grade of core area of interior joints,and the length of high-strength concrete in columns and joints extends to beams are studied. Failure characteristics,bearing capacity,displacement ductility and hysteretic curves are also analyzed deeply. Test results show that all of the interior joints are damaged at the end of beam by bending. The lengths of high-strength concrete in columns and joints extension to beams have little effect on yield load,peak load and hysteretic curves as well. While the length of high-strength concrete in columns and joints extensions to beams have significant effect on displacement ductility.On the basis of the test results analysis and construction factors,it is shown that 1.5h is the optimal length of highstrength concrete in columns and joints extension to beams.

关 键 词：高强混凝土 中节点 抗震性能 

分 类 号：TU375.4[建筑科学—结构工程]