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首页> 外文期刊>The structural design of tall buildings >Seismic behavior of highly irregular structures with multiple passive energy dissipation system: Case study of a singlecolumn elevated station
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Seismic behavior of highly irregular structures with multiple passive energy dissipation system: Case study of a singlecolumn elevated station

机译：具有多个被动消能系统的高度不规则结构的抗震性能：以单柱高架车站为例

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This paper presents a case study of the layout strategy for a multiple passive energy dissipation (MPED) system and its influence on the seismic behavior of highly irregular structures. The investigated structure is a single-column elevated station in a cantilevered structure form, which is unique and characterized by uneven mass and stiffness distributions in both elevation and plane. To improve seismic resistances of the focused structure, the MPED system composed of multiple types of passive energy dissipation (PED) devices targeting different vulnerabilities is devised. In addition, a high-fidelity and efficient numerical model is developed to assess the structural seismic performance, by leveraging the secondary development based on proprietary finite-element analysis package MARC.MSC. The fiber beam-column elements are employed to simulate the composite members under complex loading conditions, and spring elements incorporated with cyclic hardening property are developed to simulate the PED devices. Nonlinear static and time history analysis are conducted for the key substructures and whole structure. The results demonstrate that the MPED system can effectively improve the stiffness, strength, and ductility of the structure and significantly reduce its global responses. A comprehensive evaluation indicates that the MPED system is beneficial for the members directly equipped with PED devices, but the benefits are limited for unprotected members that require special attentions in design to avoid secondary damage. Through this study, valid analysis tools and suggestions are provided for the design of high-irregular structures with MPED system.
机译：本文以多被动能量耗散（MPED）系统的布局策略及其对高度不规则结构的地震行为的影响为例。所研究的结构是悬臂结构形式的单柱高架车站，其独特之处在于其在高程和平面上的质量和刚度分布不均匀。为了提高聚焦结构的抗震性能，设计了由多种针对不同漏洞的被动耗能（PED）设备组成的MPED系统。此外，通过利用基于专有有限元分析软件包MARC.MSC的二次开发，开发了一种高保真，高效的数值模型来评估结构的抗震性能。纤维梁柱单元被用来模拟复杂载荷条件下的复合构件，而具有循环硬化特性的弹簧单元被用来模拟PED装置。对关键子结构和整个结构进行了非线性静态和时程分析。结果表明，MPED系统可以有效提高结构的刚度，强度和延展性，并显着降低其整体响应。全面的评估表明，MPED系统对于直接配备PED设备的成员是有好处的，但对于不受保护的成员（在设计时需要特别注意以避免二次损坏）的好处是有限的。通过这项研究，为使用MPED系统设计高不规则结构提供了有效的分析工具和建议。

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