Seismic Response and Evaluation of SDOF Self-Centering Friction Damping Braces Subjected to Several Earthquake Ground Motions
Seismic Response and Evaluation of SDOF Self-Centering Friction Damping Braces Subjected to Several Earthquake Ground Motions
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DOI：
10.1155/2015/397273
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发表时间：
2015-10
影响因子：
--
通讯作者：
J. Hu;Myung-Hyun Noh
中科院分区：
文献类型：
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作者：
J. Hu;Myung-Hyun Noh
本文主要研究了自定心摩擦阻尼支撑在几种最大或设计水平地震动作用下的地震反应和性能。自定心摩擦阻尼支撑构件由超弹性形状记忆合金丝制成的芯向中心部件和通过剪切摩擦机制实现的耗能装置组成。与传统的钢筋同心支撑框架结构中的支撑构件相比，这些自定心摩擦阻尼支撑构件最大限度地利用了其代表性特性，使残余变形最小化，无需更换构件即可承受地震荷载。本文首先描述了自定心摩擦阻尼支撑系统的结构和响应机理，然后对单自由度弹簧数值模型进行了非线性时程分析，进行了参数化研究。在观察分析结果后，拟提出适当的设计方法，根据其比较参数最优地考虑重入能力和能量耗散，以同时利用能量容量和最小化残余变形。
This paper mainly deals with seismic response and performance for self-centering friction damping braces (SFDBs) subjected to several maximum- or design-leveled earthquake ground motions. The self-centering friction damping brace members consist of core recentering components fabricated with superelastic shape memory alloy wires and energy dissipation devices achieved through shear friction mechanism. As compared to the conventional brace members for use in the steel concentrically braced frame structure, these self-centering friction damping brace members make the best use of their representative characteristics to minimize residual deformations and to withstand earthquake loads without member replacement. The configuration and response mechanism of self-centering friction damping brace systems are firstly described in this study, and then parametric investigations are conducted through nonlinear time-history analyses performed on numerical single degree-of-freedom spring models. After observing analysis results, adequate design methodologies that optimally account for recentering capability and energy dissipation according to their comparative parameters are intended to be suggested in order to take advantage of energy capacity and to minimize residual deformation simultaneously.