主钢件腹板开孔对部分包覆钢-混凝土组合梁性能的影响  

Effect of web holes of main steel component on the behavior of partially-encased composite steel and concrete beams

作　　者：邹传仁 柯明中 周华标 俞晨达 周海敬 ZOU Chuanren;KE Mingzhong;ZHOU Huabiao;YU Chenda;ZHOU Haijing(Zhejiang Construction Investment Group Co.,Ltd.,Hangzhou 310030,China;Zhejiang Construction Engineering Group Co.,Ltd.,Hangzhou 310063,China;Zhejiang University of Technology Engineering Design Group Co.,Ltd.,Hangzhou 310014,China;Civil engineering,Zhejiang University of Technology,Hangzhou 310014,China)

机构地区：[1]浙江省建设投资集团股份有限公司,杭州310030 [2]浙江省建工集团有限责任公司,杭州310063 [3]浙江工业大学工程设计集团有限公司,杭州310014 [4]浙江工业大学土木工程学院,杭州310014

出　　处：《建筑结构》2023年第S01期1842-1847,共6页Building Structure

基　　金：浙江省建设科研项目(2022K149);杭州市科技发展计划项目(202203B42)

摘　　要：部分包覆钢-混凝土组合梁(简称PEC梁)中主钢件腹板开孔时,构件厂浇筑混凝土可一次成形,且钢腹板两侧混凝土整体性好,但钢腹板开孔也带来应力集中等问题。本文研究了主钢件腹板开孔对PEC受弯性能、抗震性能的影响。结果表明:对比钢腹板未开孔的PEC梁,钢腹板开六边形孔、圆孔的PEC梁的抗弯承载力分别降低了15%、7%,延性也有所降低,但钢腹板开圆孔时PEC梁的延性仅略有降低;钢腹板开孔导致PEC梁的弯矩-转角滞回曲线由轻微的捏拢现象,但滞回曲线总体上依然饱满,表现出良好抗震性能;此外,在往复荷载作用下,钢腹板开孔将导致孔洞附近混凝土出现“X”状斜裂缝、以及主钢件最大削弱截面处翼缘拉断。When the main steel web of partially encased steel-concrete composite beam(PEC beam)is perforated,the concrete pouring in the component factory can be formed at one time,and the concrete on both sides of the steel web has good integrity,but the opening of the steel web also brings problems such as stress concentration.In this paper,the influence of the main steel web opening on the bending performance and seismic performance of PEC is studied.The results show that compared with the PEC beams without openings in the steel web,the flexural capacity of the PEC beams with hexagonal holes and circular holes in the steel web is reduced by 15%and 7%respectively,and the ductility is also reduced,but the ductility of the PEC beams with circular holes in the steel web is only slightly reduced.The opening of the steel web causes the moment-rotation hysteresis curve of the PEC beam to be slightly pinched,but the hysteresis curve is still full on the whole,showing good seismic performance.In addition,under the action of reciprocating load,the opening of the steel web will lead to the occurrence of“X”-shaped diagonal cracks in the concrete near the hole,and the flange fracture at the maximum weakened section of the main steel member.

关 键 词：部分包覆蜂窝钢-混凝土组合梁 抗震性能 静力性能 延性 主钢件腹板开孔 

分 类 号：TU398[建筑科学—结构工程]