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| 半刚接钢框架抗竖向连续倒塌动力响应分析 |
| Dynamic Analysis of Resisting Vertical Progressive Collapse of Semi-rigid Steel frame Structures |
| 投稿时间：2019-01-18 修订日期：2019-03-27 |
| DOI： |
| 中文关键词: 向量式有限元 半刚性连接 连续倒塌 不同柱失效 节点转动刚度 |
| 英文关键词: VFIFE semi-rigid progressive collapse failure of columns rotational stiffness of nodes |
| 基金项目:国家自然科学基金项目（面上项目，重点项目，重大项目）,国家重点研发计划，中央高校基本科研业务费 |
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| 中文摘要: |
| 基于向量式有限元理论建立半刚接钢框架结构模型，考虑初始变形采用将构件拆除前后的静力分析和动力分析全过程统一的瞬时卸载法。通过对一平面半刚接钢框架结构进行动力非线性分析，研究底层不同柱失效后剩余结构抗竖向连续倒塌动力响应，对比分析不同节点转动刚度对钢框架结构抗倒塌性能的影响，为钢框架结构抗倒塌设计提供依据。分析结果表明，节点转动刚度对钢框架结构抗竖向连续倒塌影响较大，因此在研究钢框架结构抗竖向连续倒塌时有必要考虑梁柱真实连接刚度。 |
| 英文摘要: |
| Based on Vector Form Intrinsic Finite Element (VFIFE), a structure model of semi-rigid steel frame was constructed. The transient unloading method considering initial deformation condition was used to analyze the integration of static and dynamic analysis before and after component removed. Through the dynamic nonlinear analysis of a plane semi-rigid steel frame, the dynamic response of the residual structure against vertical continuous collapse after failure of different columns in the bottom floor was studied, and influence of different node rotational stiffness on collapse resistance of the structure was compared. The results show that the rotational stiffness of nodes has a great influence on the vertical progressive collapse of the steel frame structure. Therefore, it is necessary to consider the true connection stiffness of beams and columns in the study of the vertical progressive collapse of steel frame structures. |
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