Shake table testing and numerical simulation of a self‐centering energy dissipative braced frame
Shake table testing and numerical simulation of a self‐centering energy dissipative braced frame
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DOI：
10.1002/eqe.2290
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发表时间：
2013-09
影响因子：
4.5
通讯作者：
J. Erochko;C. Christopoulos;R. Tremblay;Hyung-Joon Kim
中科院分区：
文献类型：
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作者：
J. Erochko;C. Christopoulos;R. Tremblay;Hyung-Joon Kim
自对中耗能支撑（SCED）是一种新型的钢支撑构件，既能为结构提供阻尼，又能提供重新对中的能力。本研究的目的是确认SCED支撑在完整结构系统中的行为，并确认使用最先进的计算机模型以及对实践工程师有用的简化模型对这些系统进行建模的能力。为此，设计并建造了一个三层SCED支撑框架，用于振动台试验。两个并行的计算机模型的整个框架：一个使用opensees非线性动力建模软件，和简化模型使用商业结构分析软件sap2000。框架样本经受了12次显著地震，在测试之间没有任何调整或修改。SCED支架按照设计防止了瓣架中的残留漂移，并且没有显示出由于磨损而导致的任何显著退化。两个数值模型都能很好地预测位移、层间剪力和柱力。峰值层加速度被高估的模型，这种影响被认为是由缺乏过渡刚度变化的滞后模型的支撑。版权所有© 2013约翰威利父子有限公司.
The self‐centering energy dissipative (SCED) brace is a new steel bracing member that provides both damping to the structure and a re‐centering capability. The goal of this study was to confirm the behavior of SCED braces within complete structural systems and to confirm the ability to model these systems with both a state‐of‐the‐art computer model as well as a simplified model that would be useful to practicing engineers. To these ends, a three‐story SCED‐braced frame was designed and constructed for testing on a shake table. Two concurrent computer models of the entire frame were constructed: one using the opensees nonlinear dynamic modeling software, and a simplified model using the commercial structural analysis software sap2000. The frame specimen was subjected to 12 significant earthquakes without any adjustment or modification between the tests. The SCED braces prevented residual drifts in the frame, as designed, and did not show any significant degradation due to wear. Both numerical models were able to predict the drifts, story shears, and column forces well. Peak story accelerations were overestimated in the models; this effect was found to be caused by the absence of transitions at stiffness changes in the hysteretic model of the braces. Copyright © 2013 John Wiley & Sons, Ltd.