现浇楼板钢筋对梁端抗弯能力影响的数值分析

Analysis of Influence of Monolithic Slab Reinforcement on Flexural Behavior of Beams

为了研究实际钢筋混凝土(RC)框架结构中现浇楼板钢筋对梁端抗负弯矩能力的影响,采用有限元ABAQUS对一三层RC空间框架进行了数值仿真模拟,分析了结构在侧向荷载作用下的裂缝开展情况以及与梁肋平行的板筋沿着楼板宽度方向的应力分布情况。分析结果表明:现浇楼板在梁端抗弯能力中的参与作用对结构的屈服机制具有较大影响,现浇楼板的存在对框架梁端抗弯承载力有着显著的提高,在结构设计过程中应予以考虑。

In order to study the influence of monolithic slab in the actual flexural capacity of beam end in RC frame structures, a 3D, three-story RC frame structure subject to lateral load is simulated by the finite element software ABAQUS. The crack development and the distribution of slab reinforcement stress along slab width direction is investigated. The analysis results show that the failure mechanism of the frame structure is significantly effected by the participation degree of monolithic slab. The resistance to bending moment capacity on the beam ends is improved significantly by the monolithic slab. So the effect of the monolithic slab on the actual flexural capacity of beam end should be considered in frame structure design.