Seismic Analysis and Design of Steel Frames with Partially Restrained Connections

部分约束连接钢框架的抗震分析与设计

• 批准号: 9526809
• 负责人: Achintya Haldar
• 金额: $ 17.95万
• 依托单位: University of Arizona
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-10-01 至 2000-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9526809&HistoricalAwards=false
• 关键词: Seismic; Analysis; Design; Steel; Frames

9526809 Haldar A comprehensive study will be conducted on the inelastic seismic response behavior of steel frames with partially restrained (PR) connections considering all major sources of energy dissipation. The procedure considers as realistically as possible the geometric nonlinearity including the P-delta effect due to drift in the presence of PR connections, material nonlinearity, loading and reloading behavior at the PR connections, and damping. Uncertainty in the parameters will be considered using a nonlinear stochastic finite element algorithm. Reliability analysis will be conducted to generalize the observations made during the experiments and deterministic analyses, and for codification of design. Serviceability requirements consistent with the strength requirements will then be formulated. Several definitions of local, interstory and global ductility will be investigated, particularly for the multiple degree of freedom structures, and the most appropriate definition will be identified. Commonly used steel frames including moment- residing frames, braced frames, dual systems with concentric and eccentric braces will be investigated. Design factors will be re-evaluated and introduced for the seismic design of steel frames with PR connections. The study will complement SAC's Phase II study on seismic analysis of steel framed structures which is funded by FEMA. The project will involve industry trade and associations such as the American Institute of Steel Construction (AISC) and the American Iron and Steel Institute (AISI). ***

9526809 Haldar将对部分约束（PR）连接的钢框架的非弹性地震反应行为进行全面研究，考虑所有主要的能量耗散源。 该程序考虑尽可能现实的几何非线性，包括P-三角洲效应，由于在PR连接，材料非线性，加载和再加载行为的PR连接，和阻尼的存在下漂移。 将使用非线性随机有限元算法考虑参数的不确定性。 将进行可靠性分析，以概括实验和确定性分析期间的观察结果，并对设计进行编码。 然后将制定与强度要求一致的适用性要求。 将研究局部、层间和整体延性的几种定义，特别是对于多自由度结构，并确定最合适的定义。 本文将研究常用的钢框架结构，包括框架结构、支撑结构、偏心支撑和同心支撑双重体系。 将重新评估设计因素，并将其引入PR连接钢框架的抗震设计。 该研究将补充SAC关于钢框架结构地震分析的第二阶段研究，该研究由FEMA资助。 该项目将涉及行业贸易和协会，如美国钢结构协会（AISC）和美国钢铁协会（AISI）。 ***