Consistent Criteria for Seismic Design of Weak Column StrongBeam Steel Frames

本课题研究弱柱强梁的使用 （WCSB）抗震设计的力矩框架。 最近的一 对这种钢框架的分析研究表明， 框架可能会大大增加延性需求， 可用的延展性超过在相当强的 柱-弱梁结构 这就提出了一个问题 这些变化是否保守。 在这项研究中， 将开发WCSB配置。 非弹性 不同高度钢框架结构抗震性能 和几何形状受到不同的抗震设计标准， 将分析加速记录。 分析将 考虑并比较WCSB帧的响应， 可比较的SCWB框架，以及具有弱柱的框架 孤立的故事或单列行。 延展性需求 将计算并比较各种条件， 比较将分离出一些条件， 实验评价 结果将提供更好的 理解弱柱框架的行为和形式 改进设计程序的基础。 这项研究建议得到了 加州结构工程师协会 地震委员会在1988年6月18日通过的一项决议中， 这一支持得到了SEAOC国家委员会的正式批准， 董事会正在等待。 它还得到了美国钢铁公司的支持， 和钢铁协会（AISI）抗震建筑规范委员会， 该委员会将设立一个咨询小组， 进行研究。 几个专业工程协会和规范 包括结构工程师协会在内的委员会， 加州（SEAOC）批准了这项研究，因为 主题的重要性。

This project investigates the use of weak column-strong beam (WCSB) moment frames for seismic resistant design. A recent analytical study of such a steel frame indicates that WCSB frames may have greatly increased ductility demand and reduced available ductility over that obtained in comparable strong column-weak beam (SCWB) structures. This raises a question as to whether these recent changes are conservative. In this study rational guidelines for the design of frames with the WCSB configuration will be developed. The inelastic seismic behavior of steel building frames of different heights and geometry subjected to different seismic design criteria and acceleration records will be analyzed. The analyses will consider and compare the response for WCSB frames, comparable SCWB frames, and frames with weak columns at isolated stories or single column lines. The ductility demand will be computed and compared for the various conditions, and the comparison will isolate a few conditions for further experimental evaluation. The results will provide a better understanding of the behavior of weak column frames and form a basis for improved design procedures. This research proposal has received the support of the Structural Engineers Association of California (SEAOC) Seismology Committee in a resolution passed June 18, 1988, and formal approval of this support by the SEAOC State Board of Directors is pending. It is also supported by the American Iron and Steel Institute (AISI) Seismic Building Codes Committee, and this committee will establish an Advisory Panel for the conduct of the research. Several professional engineering associations and code committees including the Structural Engineers Association of California (SEAOC) endorsed this study due to the practical significance of the subject.