Seismic performance of stiffness-based designed buckling-restrained braced frame and special moment-resisting frame dual systems
Seismic performance of stiffness-based designed buckling-restrained braced frame and special moment-resisting frame dual systems
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DOI：
10.1080/15732479.2015.1071854
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发表时间：
2016-08
影响因子：
3.7
通讯作者：
A. Mehdipanah;S. R. Mirghaderi;Seyyed Ali Razavi Tabatabaei
中科院分区：
文献类型：
--
作者：
A. Mehdipanah;S. R. Mirghaderi;Seyyed Ali Razavi Tabatabaei
摘要 地震法规中提出的双系统设计传统程序存在一些局限性，例如没有为二级系统设定所需的最小刚度值。本研究研究了设计屈曲约束支撑框架（BRBF）和特殊抗弯框架（SMRF）双系统时二次系统所需的刚度极限值。对不同高度、不同主次系统相对刚度比的双结构样本进行了非线性静力和时程分析。采用基于刚度的设计方法来确保设计的系统包含预定义的相对刚度比。结果表明，当BRBF和SMRF子系统分别占总刚度的65%和35%时，可以获得合适的刚度组合比。在根据所提出的方法设计的双系统中实施合适的相对刚度比，导致结构高度上的均匀塑性分布。
Abstract Conventional procedure for designing dual systems, proposed in seismic regulations, encompasses some limitations such as not putting a required minimum stiffness value for the secondary system. This research investigates the stiffness limit value required for the secondary system for designing buckling-restrained braced frame (BRBF) and special moment-resisting frame (SMRF) dual systems. Non-linear static and time history analyses were carried out on the sample dual structures with different heights and different relative stiffness ratios of the primary system to the secondary system. A stiffness-based designing approach is employed to ensure that the designed system comprises the predefined relative stiffness ratios. It is demonstrated that the suitable stiffness combination ratio is gained when the BRBF and SMRF subsystems have 65% and 35% of the total stiffness, respectively. Implementation of the suitable relative stiffness ratio in the dual systems designed according to the presented approach, leads to a uniform plasticity profile in the height of structures.