Effects of brace stiffness on performance of structures with supplemental Maxwell model‐based brace–damper systems
Effects of brace stiffness on performance of structures with supplemental Maxwell model‐based brace–damper systems
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DOI：
10.1002/eqe.1023
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发表时间：
2011-01
影响因子：
4.5
通讯作者：
Yung-Tsang Chen;Y. Chai
中科院分区：
文献类型：
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作者：
Yung-Tsang Chen;Y. Chai
本文研究了具有基于麦克斯韦模型的支撑 - 阻尼器系统的剪切型建筑，主要强调支撑刚度的影响。首先研究了在人字形支撑顶部安装粘性阻尼器的单层建筑。针对这种简单结构推导出了封闭形式的解，将支撑刚度和阻尼系数与响应位移或加速度的目标降低量相关联。对于给定的支撑刚度，对解进行最小化以得到一组公式，从而能够确定最优阻尼系数，确保达到期望的性能。随后将该模型扩展到在人字形支撑顶部安装粘性阻尼器的多层建筑。对于层间位移均方、楼层加速度或基底剪力的目标降低量，通过迭代过程获得最小支撑刚度和最优阻尼系数。与通常不考虑支撑刚度而单独优化阻尼系数的传统方法不同，响应降低（意味着性能提高）是通过支撑刚度和粘性阻尼系数的组合来实现的。使用2层和10层建筑研究了多自由度系统的特性，从而可以量化支撑刚度对建筑整体性能的影响。版权所有© 2010约翰威立父子有限公司
Shear‐type buildings with Maxwell model‐based brace–damper systems are studied in this paper with a primary emphasis on the effects of brace stiffness. A single‐story building with a viscous damper installed on top of a Chevron‐brace is first investigated. Closed‐form solutions are derived for the simple structure, relating the brace stiffness and damper coefficient to the targeted reduction in response displacement or acceleration. For a given brace stiffness, the solution is minimized to give a set of formulae that will allow the optimal damper coefficient to be determined, assuring the desired performance. The model is subsequently extended to multistory buildings with viscous dampers installed on top of Chevron‐braces. For a targeted reduction in the mean square of the interstory drift, floor acceleration or base shear force, the minimum brace stiffness and optimal damper coefficients are obtained through an iterative procedure. The response reduction, which signifies the improved performance, is achieved by a combination of brace stiffness and viscous damper coefficients, unlike conventional approaches where damper coefficients are typically optimized independent of brace stiffnesses. Characteristics of multi‐degree‐of‐freedom systems are studied using a 2‐story and a 10‐story buildings where the effects of brace stiffness on the overall performance of the building can be quantified. Copyright © 2010 John Wiley & Sons, Ltd.