A new methodology for energy-based seismic design of steel moment frames

详细信息    查看全文

• 作者：Mebrahtom Gebrekirstos Mezgebo ; Eric M. Lui
• 关键词：energy ; based seismic design ; hysteretic energy distribution ; MDOF systems ; steel moment frames ; story ; wise optimization design
• 刊名：Earthquake Engineering and Engineering Vibration
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：16
• 期：1
• 页码：131-152
• 全文大小：
• 刊物类别：Engineering
• 刊物主题：Geotechnical Engineering & Applied Earth Sciences; Civil Engineering; Vibration, Dynamical Systems, Control;
• 出版者：Institute of Engineering Mechanics, China Earthquake Administration
• ISSN：1993-503X
• 卷排序：16

文摘

A procedure is proposed whereby input and hysteretic energy spectra developed for single-degree-of-freedom (SDOF) systems are applied to multi-degree-of-freedom (MDOF) steel moment resisting frames. The proposed procedure is verified using four frames, viz., frame with three-, five-, seven- and nine-stories, each of which is subjected to the fault-normal and fault-parallel components of three actual earthquakes. A very good estimate for the three- and five-story frames, and a reasonably acceptable estimate for the seven-, and nine-story frames, have been obtained. A method for distributing the hysteretic energy over the frame height is also proposed. This distribution scheme allows for the determination of the energy demand component of a proposed energy-based seismic design (EBSD) procedure for each story. To address the capacity component of EBSD, a story-wise optimization design procedure is developed by utilizing the energy dissipating capacity from plastic hinge formation/rotation for these moment frames. The proposed EBSD procedure is demonstrated in the design of a three-story one-bay steel moment frame.