考虑板筋参与梁端承载力贡献的设计方法及抗震性能研究  

Study on Design Method and Seismic Performance in Consideration of the Contribution of Rebar in Slabs to the Bearing Capacity of Beams

作　　者：杨小卫[1] 王亚勇[1] 

机构地区：[1]中国建筑科学研究院,北京100013

出　　处：《建筑科学》2011年第7期11-16,共6页Building Science

摘　　要：通过考虑一定有效翼缘宽度范围的楼板内钢筋对梁端负弯矩承载力贡献并进行梁端配筋设计,研究楼板与梁的共同工作性能。应用对梁、柱采用考虑钢筋和混凝土的纤维梁模型,楼板采用考虑钢筋和混凝土的复合材料分层壳单元模型,建立可考虑楼板对梁刚度及承载力贡献的整体弹塑性有限元分析模型,对影响RC框架结构的屈服机制的主要因素进行了研究。不同算例的分析结果表明,楼板对梁端的承载力贡献及梁柱等效相对线刚度比对其屈服机制和结构的抗倒塌能力具有较显著的影响。By considering the contribution of rebar in the slab to the negative moment capacity of the beam within the scope of effective flange width to design the longitudinal reinforcement,the cooperation performance between slabs and beams was studied.Elastic-plastic finite element model was set up by considering the contribution of the slab to the stiffness and bearing capacity of the beam.In this model,fiber beam model was used to simulate the beam and column,and multi-layer shell was used to simulate the slab.The main factors which affect the yield mechanism of the RC frame structure were studied too.Different examples of the analysis show that the slab has a significant impact on the bearing capacity of the beam and the equivalent relative linear stiffness ratio of beam to column has a significant impact on both the yield mechanism and the ability of anti-collapse.

关 键 词：纤维梁 分层壳 有效翼缘宽度 梁柱等效相对线刚度比 

分 类 号：TU375.4[建筑科学—结构工程] TU312