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首页> 外文期刊>International journal of steel structures >Seismic Collapse Margin of Steel Frame Structures with Symmetrically Placed Concentric Braces
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Seismic Collapse Margin of Steel Frame Structures with Symmetrically Placed Concentric Braces

机译:对称放置同心支撑的钢框架结构的地震倒塌裕度

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This paper focuses on the seismic collapse assessment conducted on the steel frame structures with symmetrically placed concentric braces using collapse margin ratio (CMR). The main issue with concentrically braced frames (CBFs) is the existence of a vast number of possible combinations in their topology. Therefore, selecting the most efficient group of retrofit schemes (RS), regarding the overall performance index (PI) of the structure requires a simple and quick method of brace manipulation, specifically, removal and/or addition, and a series of basic symmetrical principles in the retrofitting process. However, identifying the optimal RS for new or existent structures requires an evaluation of the optimal CMR value and the retrofitting cost as well. The influence of both cross-section and configuration type of the bracing system provides new insights into the collapse margin. Finally, this paper points out new parameters that should not be neglected in the retrofit design of bracing systems for steel frame structures.
机译:本文重点研究了使用倒塌裕度比(CMR)对对称放置同心支撑的钢框架结构进行的地震倒塌评估。同心支撑框架(CBF)的主要问题是在其拓扑结构中存在大量可能的组合。因此,就结构的整体性能指标(PI)而言,选择最有效的改装方案(RS)组需要一种简单快捷的支撑操作方法,特别是移除和/或添加,以及一系列基本对称原理在改造过程中。然而,为新的或现有的结构识别最佳的RS需要评估最佳的CMR值和改造成本。支撑系统的横截面和配置类型的影响为塌陷裕度提供了新的见解。最后,本文指出了钢框架结构支撑系统改造设计中不应忽略的新参数。

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