Collapse Performance of Low-Ductility Chevron Braced Steel Frames in Moderate Seismic Regions
Collapse Performance of Low-Ductility Chevron Braced Steel Frames in Moderate Seismic Regions
复制标题
DOI：
10.62913/engj.v46i3.957
复制
发表时间：
2009-09
期刊：
影响因子：
--
通讯作者：
Eric M. Hines;Mary E. Appel;Peter J. Cheever
中科院分区：
文献类型：
--
作者：
Eric M. Hines;Mary E. Appel;Peter J. Cheever
本文讨论了在马萨诸塞州波士顿为 3、6、9 和 12 层建筑结构设计的低延性 V 形支撑钢框架的分析模型中观察到的非线性动态倒塌行为。对于每种建筑配置，开发了三种单独的设计，假设 R = 2、3 和 4，没有抗震细节，但考虑了重力系统中的一些横向能力。第四种设计是低延展性双系统，其中主支撑框架系统设计用于仅抵抗风，辅助力矩框架储备系统。这些分析表明，中度地震地区的低延性结构需要明确的设计理念。基于低延展性双系统的令人鼓舞的结果，储备系统设计的概念为这一哲学的定义迈出了一步。
This paper discusses non-linear dynamic collapse behavior observed in analytical models of low-ductility chevron braced steel frames designed for 3-, 6-, 9- and 12-story building configurations in Boston, Massachusetts. For each building configuration, three separate designs were developed assuming R = 2, 3, and 4 with no seismic detailing, but accounting for some lateral capacity in the gravity system. A fourth design was developed as a low-ductility dual system, with a primary braced frame system designed to resist wind only, and a secondary moment frame reserve system. These analyses bring to light the need for a clear design philosophy for low-ductility structures in moderate seismic regions. Based on encouraging results for the low-ductility dual system, the concept of reserve system design offers a step toward the definition of this philosophy.