梁端开双孔钢筋混凝土框架梁抗震性能试验研究  

EXPERIMENTAL RESEARCH ON SEISMIC BEHAVIOR OF RC FRAME BEAM WITH DOUBLE OPENINGS AT ENDS

作　　者：苗生龙[1] 李庆涛 何旭 MIAO Shenglong;LI Qingtao;HE Xu(Xuhai College,China University of Mining and Technology,Xuzhou 221008,China;School of Mechanics and Civil Engineering,China University of Mining and Technology,Xuzhou 221116,China)

机构地区：[1]中国矿业大学徐海学院,江苏徐州221008 [2]中国矿业大学力学与土木工程学院,江苏徐州221116

出　　处：《工业建筑》2018年第8期68-72,共5页Industrial Construction

基　　金：国家自然科学基金项目(51208504);江苏省高等学校自然科学研究项目资助(17KJB560014)

摘　　要：为研究梁端开双孔情况下钢筋混凝土框架梁的抗震性能,考虑孔洞大小、位置和间距等因素,分别对梁端不开孔、开单孔和开双孔共计5个钢筋混凝土框架梁进行拟静力试验,对其破坏特征、极限承载力及滞回性能、耗能能力和延性性能等抗震性能进行了研究,分析了孔洞数量、孔洞间距等对开双孔框架梁的影响。研究结果表明：开双孔梁的极限承载力和抗震性能较未开孔梁和开单孔梁有明显下降,但当孔洞间距不大于3倍孔径时,孔2对梁的极限承载力和抗震性能的影响可忽略不计。建议在地震区梁端开双孔时,孔洞间距宜大于3倍孔径。In order to study the seismic behavior of reinforced concrete frame beams with double openings at ends,five RC frame beams（without openings,with single opening and with double openings at ends） were subjected to quasistatic loading considering the factors such as opening size,location and spacing. The damage characteristics,ultimate bearing capacity,hysteretic behavior,energy dissipation capacity and ductility of the frame beams were studied. And the effects of the number of openings and the spacing of openings on the frame beams with double openings were analyzed. The results showed that the ultimate bearing capacity and seismic behavior of beams with double openings at ends were obviously lower than those of beams without openings and with single opening. When the space between openings was not larger than 3 times than diameter of the opening,the effect of the second opening on the ultimate bearing capacity and seismic behavior of the beams could be neglected. It was suggested that the spacing of openings should be greater than 3 times diameter of the opening when double openings were opened at ends.

关 键 词：钢筋混凝土 双孔 拟静力试验 抗震性能 

分 类 号：TU352.11[建筑科学—结构工程] TU375.4