采用优化设计的后张预应力PC框架对一层软结构进行抗震改造

IF 1.4 4区工程技术 Q3 ENGINEERING, CIVIL

Earthquakes and Structures Pub Date : 2021-06-01 DOI:10.12989/EAS.2021.20.6.627

Jonathan Assefa Dereje, M. El-din, Jinkook Kim

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引用次数: 1

摘要

在这项研究中，评估了一个带有扩大梁端的自定心后张预制混凝土（PC）框架的抗震性能，用于软性一层结构的改造。通过与实验结果的比较，验证了带有扩大梁端的后张拉梁柱组件的有限元模型，并用于验证所提出系统的分析模型。然后，使用分析模型对一个软的一层结构进行改造，该结构的一层只有柱，上面有填充墙。利用遗传算法对改造系统进行了多目标优化。通过增量动力分析和易损性分析对改造后结构的抗震性能进行了评估。分析结果表明，通过优化程序标定的改造系统能够有效地提高软性一层结构的抗震性能。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Seismic retrofit of a soft first story structure using an optimally designed post – tensioned PC frame

In this study, the seismic performance of a self-centering post-tensioned precast concrete (PC) frame with an enlarged beam end is evaluated for retrofit of a soft first story structure. A finite element model of a post-tensioned beam-column assembly with an enlarged beam end is validated by comparison with experimental results, and is used to validate an analytical model of the proposed system. Then the analytical model is used to retrofit a soft first story structure with only columns in the first story and infill walls above. A multi-objective optimization of the retrofit system is carried out using genetic algorithm. The seismic performance of the retrofitted structure is assessed by incremental dynamic analysis and fragility analysis. The analysis results show that the retrofit system calibrated by the optimization procedure is effective in increasing the seismic performance of the soft first story structure.

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来源期刊

Earthquakes and Structures ENGINEERING, CIVIL-ENGINEERING, GEOLOGICAL

CiteScore

2.90

自引率

20.00%

发文量

审稿时长

>12 weeks

期刊介绍： The Earthquakes and Structures, An International Journal, focuses on the effects of earthquakes on civil engineering structures. The journal will serve as a powerful repository of technical information and will provide a highimpact publication platform for the global community of researchers in the traditional, as well as emerging, subdisciplines of the broader earthquake engineering field. Specifically, some of the major topics covered by the Journal include: .. characterization of strong ground motions, .. quantification of earthquake demand and structural capacity, .. design of earthquake resistant structures and foundations, .. experimental and computational methods, .. seismic regulations and building codes, .. seismic hazard assessment, .. seismic risk mitigation, .. site effects and soil-structure interaction, .. assessment, repair and strengthening of existing structures, including historic structures and monuments, and .. emerging technologies including passive control technologies, structural monitoring systems, and cyberinfrastructure tools for seismic data management, experimental applications, early warning and response