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首页> 外文期刊>Engineering Structures >An optimum retrofit strategy for moment resisting frames with nonlinear viscous dampers for seismic applications
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An optimum retrofit strategy for moment resisting frames with nonlinear viscous dampers for seismic applications

机译：具有非线性粘性阻尼器的抗力矩框架的抗震框架的最佳改装策略

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摘要

The dynamic response of a multi-story steel moment resisting frame (MRF) equipped with fluid viscous (VS) dampers and subjected to seismic loads is investigated numerically. The structure is retrofitted with two fluid VS dampers per story in its middle bay. Its dynamic response is analyzed when retrofitted with linear and nonlinear VS dampers. Two performance indices are developed in order to evaluate by means of a simple procedure the adequacy of each retrofitting option. The different options are evaluated and an optimum design is selected. The main objective of this numerical research is to build a simple methodology leading to an optimum retrofitting option with nonlinear fluid VS dampers. A secondary objective of the study is to compare the structure response retrofitted with linear and nonlinear VS dampers and finding an optimum retrofit strategy attending to two performance indices that are developed. The seismic behavior of a six-story steel structure is analyzed and it is found that the maximum force experienced by the dampers in the nonlinear case may be reduced in more than a 35% in comparison with the linear retrofitting case with a similar structural seismic performance.
机译：数值研究了装有流体粘性（VS）阻尼器并承受地震荷载的多层钢抗弯框架（MRF）的动力响应。该结构在其中间隔间中每个楼层都加装了两个流体VS阻尼器。当对线性和非线性VS阻尼器进行改装时，将分析其动态响应。开发了两个性能指标，以便通过一个简单的程序来评估每个改装方案的充分性。评估不同的选项并选择最佳设计。这项数值研究的主要目的是建立一种简单的方法，从而为非线性流体VS阻尼器提供最佳的改装方案。研究的第二个目的是比较用线性和非线性VS阻尼器改装的结构响应，并找到符合两个已开发性能指标的最佳改装策略。分析了六层钢结构的抗震性能，发现与类似结构抗震性能的线性改型相比，在非线性情况下减振器承受的最大力可降低35％以上。 。

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