论文部分内容阅读
根据10个梁高不等钢筋混凝土框架中节点试件在低周反复荷载作用下的试验结果,重点分析了该类框架节点的破坏过程和破坏特点。在试验研究的基础上,建立了框架中节点等效核心区在剪、压复合作用下的计算模型,应用软化拉-压杆模型方法(简称SSTM)对等效核心区进行了受力分析。研究表明:软化拉-压杆模型理论计算值与试验结果接近,与现行规范建议方法计算结果相当,但软化拉-压杆模型方法有明确的力学计算模型,能较为合理地反映框架节点的受力机理。
According to the test results of 10 specimens with different heights in RC frames under cyclic loading, the failure process and failure characteristics of such joints are analyzed emphatically. Based on the experimental study, the calculation model of the equivalent core zone in the frame under the combined effect of shear and pressure is established. The stress analysis of the equivalent core zone is carried out by using the softened pull-pressure rod model (SSTM). The results show that the calculated value of softening pull-strut model is close to the experimental one, which is equivalent to the calculated result of the current standard method. However, the softening pull-strut model has a clear mechanical calculation model, which can reasonably reflect the influence of the frame node Force mechanism.