板钢筋应力状态对框架梁受力影响的数值模拟分析

Numerical Simulation Analysis on Influence of Stress States of Slab Reinforcing Bars on RC Frame Beams

现浇楼板中的钢筋在地震未发生时主要承担竖向荷载,板内上下层钢筋具有不同的应力状态。研究水平地震作用下不同应力状态的板钢筋参与框架梁端负弯矩承载力的程度和方式,采用有限元软件ABAQUS建立板钢筋应力状态不同的3个带楼板翼缘框架梁模型并进行对比分析,得出竖向荷载引起的板钢筋应力状态对框架梁受力的影响规律,并提出合理调整梁端钢筋配置的建议。

Slab reinforcing bars is in different states of stress before earthquake comes because of vertical loads.In order to find out the degree and pattern that slab reinforcing bars contribute to the bearing capacity of main beams in RC frame,a finite element program ABAQUS is used to quest this problem.The three models show that slab reinforcing bars in different states of stress affect the mechanical behavior of main beams.In addition,a suggestion about the arrangement of reinforcing bars of slabs and beams is given in this article.