高层剪力墙结构中不同连梁模拟单元对比分析

Comparative analysis of different coupling beam simulation elements in high-rise shear wall structure

在高层住宅建筑中多采用剪力墙结构,门、窗等位置通过连梁将两侧剪力墙墙肢连接形成整体抗侧力体系,连梁承担楼板传递的竖向荷载,且在罕遇地震作用下作为重要的耗能构件。目前结构有限元分析软件针对连梁有多种建模方式,构件层面的计算结果差异较大。本文结合某高层住宅工程实例,分析了剪力墙开洞连梁、普通梁连梁、壳元梁连梁等不同建模方式下的自振周期、位移角等参数的计算结果,并比较了不同建模方式中连梁的弯矩、剪力、配筋等结果的异同。结果表明,当连梁跨高比小于5时,壳元梁单元可较好地反应连梁的作用机理,建模方便且结果更合理。

Shear wall structures are mostly used in high-rise buildings.Coupling beams are used connect the shear wall limbs into an anti-lateral force system in the door and window position.The coupling beams bear the vertical load transmitted from the floor slab,and is the important energy-consuming components when encountering a rare earthquake.The current structural finite element analysis software has a variety of modeling methods for coupling beams,and the calculation results vary greatly at the component level.In this paper,based on an example of a high-rise residential project,the differences in parameters such as natural vibration period,displacement angle and other parameters in different modeling methods such as shear wall opening beam,ordinary beam coupling beam and shell element beam coupling beam are calculated and analyzed.Similarities and differences in the results of the bending moment,shear force,and reinforcement of the coupling beam been compared in the different modeling method.The results show that the shell element beam element can better reflect the action mechanism of the coupling beam when the span-depth ratio is less than 5,the modeling is convenient and the result is relatively more reasonable.