论文部分内容阅读
楼板的空间组合作用对组合框架结构体系的抗侧力行为具有重要影响。极限承载能力和刚度是设计中最为关心的两项基本性能,该文重点研究楼板空间组合作用对极限承载能力的影响。首先建立边节点弹塑性精细有限元局部模型,研究极限状态下影响梁端楼板贡献的关键因素。在此基础上,通过大量数值计算和参数分析,提出用于计算组合框架梁端极限正负弯矩的楼板有效宽度简化计算公式,并和精细有限元计算结果进行充分对比,具有良好的精度。该文提出的简化公式对于边节点和中节点均适用。最后,采用该文建议的有效宽度计算公式计算梁端极限弯矩,并和精细有限元计算结果进行对比,计算精度较高。
The combination of floor space has an important influence on the lateral resistance behavior of the composite frame system. The ultimate bearing capacity and stiffness are two basic properties that are most concerned about in design. This paper focuses on the influence of floor space combination on the ultimate bearing capacity. At first, a local elastic-plastic finite element model of the edge joints is established to study the key factors that affect the contribution of the beam-side slab in the limit state. On this basis, the simplified calculation formula of floor effective width for calculating the positive and negative moment limit of the composite frame beam ends is put forward through a large number of numerical calculation and parameter analysis. The calculated results are in good contrast with the results of the finite element analysis and have good accuracy. The simplified formula proposed in this paper is suitable for both edge nodes and mid-nodes. Finally, using the effective width calculation formula proposed in this paper, the ultimate bending moment at the beam end is calculated and compared with the results of the fine finite element method, the calculation precision is high.