提升抗连续倒塌能力的钢框架梁柱刚性节点设计理念与方法

发布时间：2018-05-26 09:11

本文选题：钢框架 + 刚性节点　；参考：《建筑结构学报》2016年06期

【摘要】：以方钢管柱隔板贯通式节点为研究对象,为提高其抗连续倒塌性能,提出了采用改进型全螺栓连接和加固型栓焊连接的钢框架梁柱刚性节点设计方法。通过试验及有限元模拟分析,考察不同连接构造的节点在中柱失效工况下的性能。结果表明:改进型全螺栓连接构造能够延缓下翼缘断裂,使节点子结构在更大的变形下保持传力截面的完整性,弯曲机制和悬索机制提供的抗力能同时发展至较大的值;加固型栓焊连接构造保证下翼缘连接板件在焊接连接失效后继续有效传力,且使螺栓孔壁局部承压塑性破坏优先发生,传力截面在更大的变形下能保持其完整性,梁端轴力可达到全截面轴拉屈服承载力,悬索机制提供的抗力可充分发展。因此,改进型全螺栓连接构造与加固型栓焊连接构造可提高结构的抗连续倒塌能力,验证了设计方法的可行性。
[Abstract]:In order to improve the resistance to continuous collapse, a new design method of steel frame Liang Zhu rigid joints with improved bolted connections and reinforced bolted joints is proposed in this paper. The performance of joints with different connections under the condition of mid-column failure was investigated by means of test and finite element simulation. The results show that the improved full-bolt connection structure can delay the fracture of the lower flange, keep the integrity of the force transfer section under the larger deformation, and the resistance provided by the bending mechanism and the suspension mechanism can develop to a larger value at the same time. The reinforced bolt welding connection structure ensures that the lower flange joint plate continues to transmit force effectively after the welding failure, and makes the local compression plastic failure of the bolt hole wall take place first, and the force transfer section can maintain its integrity under greater deformation. The axial force at the end of the beam can reach the axial tensile yield bearing capacity of the full section, and the resistance provided by the suspension mechanism can be fully developed. Therefore, the improved all-bolt connection structure and the reinforced bolted welding connection structure can improve the continuous collapse resistance of the structure, and verify the feasibility of the design method.
【作者单位】：同济大学土木工程防灾国家重点实验室;同济大学建筑工程系;中国航空规划设计研究总院有限公司;
【基金】：国家自然科学基金项目(51008220,51378380) 曙光计划(15SG19)
【分类号】：TU391

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