A case study on the application of passive control and seismic isolation techniques to cable-stayed bridges: A comparative investigation through non-linear dynamic analyses
A case study on the application of passive control and seismic isolation techniques to cable-stayed bridges: A comparative investigation through non-linear dynamic analyses
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DOI：
10.1016/j.engstruct.2015.04.048
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发表时间：
2015-09
影响因子：
5.5
通讯作者：
M. D. Martínez-Rodrigo;A. Filiatrault
中科院分区：
文献类型：
--
作者：
M. D. Martínez-Rodrigo;A. Filiatrault
本文研究了位于高烈度地震区的既有钢斜拉桥的抗震性能。1988年，由于地震活动，该结构的一个锚定板发生故障，需要关闭和结构修复。在这项研究中，改造的可能性与不同的被动附加阻尼和隔震系统的原桥提出和评估，以改善结构的响应在其纵向方向。为此，开发了桥梁的有限元模型，并通过一组不同强度的历史地面运动（包括近场记录）下的非线性动态响应分析来评估结构响应。在模型中引入了强度退化能力，允许所有构件发生脆性破坏。地震性能指标指的是未加固结构的动态响应和推覆分析的结果进行定义，并用于比较所提出的创新解决方案。的桥梁的整体响应的主要改善和结论，最合适的改造方案，为特定的案例研究确定。
This paper investigates the seismic performance of an existing steel cable-stayed bridge located in a high seismic zone. In 1988 the structure experienced the failure of one of its anchorage plates needing closure and structural repair as a consequence of seismic activity. In this study, the possibility of retrofitting the original bridge with different passive supplemental damping and seismic isolation systems is proposed and assessed, in order to improve the response of the structure in its longitudinal direction. To this end a Finite Element model of the bridge is developed and the structural response is evaluated through non-linear dynamic response analyses under a set of historical ground motions of different intensities, including a near field record. Strength degradation capabilities are introduced in the model, allowing the occurrence of brittle failure in all the members. Seismic performance indices referred to the dynamic response of the unretrofitted structure and to the results of a pushover analysis are defined and used to compare the proposed innovative solutions. The major improvement on the overall response of the bridge is shown and conclusions regarding the most appropriate retrofit alternative for the particular case study are determined.