负弯矩作用下含角钢连接件的叠合板组合梁力学性能研究  

Study on mechanical properties of composite beams with laminated slabs containing angle steel connectors under negative bending moments

作　　者：丁克伟 张星辰 刘运林 贾高宗 房尚京 DING Kewei;ZHANG Xingchen;LIU Yunlin;JIA Gaozong;FANG Shangjing(School of Civil Engineering,Anhui Jianzhu University,Hefei 230601,China)

机构地区：[1]安徽建筑大学土木工程学院,安徽合肥230601

出　　处：《合肥工业大学学报（自然科学版）》2022年第12期1643-1648,1704,共7页Journal of Hefei University of Technology：Natural Science

基　　金：国家自然科学基金资助项目(11472005);安徽省高校协同创新资助项目(GXXT-2019-005)。

摘　　要：文章研究叠合板预埋角钢连接件与伸出“胡子筋”2种构造措施的组合梁在受力性能上的差异,分别对2根叠合板组合梁进行单点静力试验,并通过ABAQUS软件对不同剪力连接度情况下含角钢连接件的叠合板组合梁进行有限元模拟.结果表明:相对于出筋构造措施,预埋角钢连接件会增大混凝土板横向开裂风险,减小纵向开裂风险;2个试件的极限承载力几乎一致,含角钢连接件的叠合板组合梁弹性抗弯刚度更大;与增加栓钉数量相比,预埋一定数量的角钢对抗弯刚度的提升效果更加显著;预埋角钢连接件将导致真实栓钉剪力连接度大于相关规范计算值.In this paper,the differences in mechanical properties between composite beams with embedded angle steel connectors and those with beard reinforcement are studied.The single point static tests of two composite beams with composite slabs are carried out,and the finite element simulation of composite beams with laminated slabs containing angle steel connectors under different shear connection degrees is carried out by ABAQUS software.The results show that the embedded angle steel connectors increase the transverse cracking risk and reduce the longitudinal cracking risk of concrete slabs compared with the reinforcement construction measures.The ultimate bearing capacity of the two specimens is almost the same,and the elastic bending stiffness of composite beams with laminated slabs containing angle steel connectors is greater.The effect of embedding a certain number of angle steels on bending stiffness is more significant than that of increasing the number of bolts.It is proved that the embedded angle steel connectors will cause the real shear connection degree of the bolt to be greater than the calculated value of the relevant code.

关 键 词：角钢连接件 叠合板组合梁 单点静力试验 剪力连接度 抗弯刚度 

分 类 号：TU398.9[建筑科学—结构工程]