往复荷载作用下叠合板受力性能有限元研究  

Finite Element Study on Mechanical Behaviors of Composite Slabs under Reciprocating Loads

作　　者：魏乐毅 郑志远 张悦 程芬 Wei Leyi;Zheng Zhiyuan;Cheng Fen;Zhang Yue(School of Urban Construction,Hubei Business College,Wuhan 430070,China)

机构地区：[1]湖北商贸学院城市建设学院,武汉430070

出　　处：《特种结构》2024年第6期18-25,共8页Special Structures

基　　金：湖北省教育厅科学技术研究项目(B2023392);湖北省教育厅科学技术研究计划指导性项目(B2021381)。

摘　　要：为研究往复荷载作用下叠合板的受力性能,建立了不同叠合面粗糙度试件下的简支叠合板非线性有限元模型,通过考察对比板的滞回曲线、骨架曲线、刚度退化、耗能系数、延性系数等特性,研究叠合面粗糙度、预制层与后浇层厚度比、桁架钢筋配筋率、抗剪钢筋形式等参数对叠合板受力性能的影响。结果表明:配有桁架钢筋叠合板的滞回曲线较现浇板滞回曲线出现了一定的“捏缩”现象,叠合面拉毛处理后增大了叠合板的刚度与耗能性能,叠合板位移延性低于现浇板。不同预制/后浇板厚度比对试件承载性能和耗能能力产生显著影响。桁架钢筋配筋率越大,叠合板的承载能力和耗能性能越强,延性反而越差。配有传统抗剪钢筋的叠合板有较好的承载能力和刚度,配有新型抗剪钢筋的叠合板有较好的耗能能力和延性。In order to study the mechanical behaviors of composite slabs under reciprocating loads,nonlinear finite element models of simply supported composite slabs with different roughness of composite surfaces were established.By examining the hysteretic curve,skeleton curve,stffness degradation,energy dissipation coefficient,ductility coefficient and other characteristics of the contrast slabs,the influences of the composite surface roughness,the thickness ratio of the precast layer to the cast layer,the reinforcement ratio of the truss reinforcement,the shear reinforcement form and other parameters on the mechanical behaviors of the composite slabs were studied.The results showed that the hysteretic curves of the composite slabs with trusses and steel bars had a certain"pinch"phenomenon compared with the hysteretic curves of the cast slabs.The stiffness and energy dissipation properties of the composite slabs increased after the drawing of the composite surface,and the displacement ductility of the composite slabs was lower than that of the cast slabs.The thickness ratio of precast slab to post cast slab had significant influence on the bearing performance and energy dissipation capacity of components.The larger the reinforcement ratio of the truss,the stronger the bearing capacity and energy dissipation performance of the composite slab,but the worse the ductility.The composite slab equipped with traditional shear reinforcement had better bearing capacity and stiffness,while the composite slab equipped with new shear reinforcement had better energy dissipation capacity and ductility.

关 键 词：桁架钢筋叠合板 有限元法 叠合面 低周往复荷载 滞回性能 

分 类 号：TU398[建筑科学—结构工程]