Fragility evaluation of integral abutment bridge including soil structure interaction effects

IF 1.4 4区工程技术 Q3 ENGINEERING, CIVIL

Earthquakes and Structures Pub Date : 2021-02-01 DOI:10.12989/EAS.2021.20.2.201

J. Sunil, A. Lego, Anjan Dutta

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引用次数: 0

Abstract

Contrast to the conventional jointed bridge design, integral abutment bridges (IABs) offer some marked advantages like reduced maintenance and enhanced service life of the structure due to elimination of joints in the deck and monolithic construction practices. However, the force transfer mechanism during seismic and thermal movements is a topic of interest owing to rigid connection between superstructure and substructure (piers and abutments). This study attempts to model an existing IAB by including the abutment backfill interaction and soil-foundation interaction effects using Winkler foundation assumption to determine its seismic response. Keeping in view the significance of abutment behavior in an IAB, the probability of damage to the abutment is evaluated using fragility function. Incremental Dynamic Analysis (IDA) approach is used in this regard, wherein, nonlinear time history analyses are conducted on the numerical model using a selected suite of ground motions with increasing intensities until damage to abutment. It is concluded from the fragility analysis results that for a MCE level earthquake in the location of integral bridge, the probability of complete damage to the abutment is minimal.

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考虑土-结构相互作用影响的整体桥台脆性评价

与传统的有接缝桥梁设计相比，整体式桥台桥（IABs）具有一些显著的优点，如由于消除了桥面和整体式施工实践中的接缝，减少了维护，提高了结构的使用寿命。然而，由于上部结构和下部结构（桥墩和桥台）之间的刚性连接，地震和热运动期间的力传递机制是一个令人感兴趣的话题。本研究试图通过使用Winkler基础假设来确定现有IAB的地震响应，包括桥台-回填相互作用和土壤-基础相互作用效应，从而对其进行建模。考虑到桥台行为在IAB中的重要性，使用脆性函数评估桥台损坏的概率。在这方面使用了增量动力分析（IDA）方法，其中，使用选定的一组强度不断增加的地面运动对数值模型进行非线性时程分析，直到桥台受损。脆性分析结果表明，对于整体桥位置的MCE级地震，桥台完全损坏的概率最小。

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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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