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Design of bridges utilizing a novel earthquake resistant abutment with high capacity wing walls

机译：利用新型抗震基台和大翼墙设计桥梁

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摘要

Abutments are not considered to participate strongly in the earthquake resisting system (ERS) of Euro-code-based designed bridges. However, previous studies showed that seat-type abutments can reduce effectively the seismic actions of bridges, especially when the openings at the expansion joints accommodate only the serviceability movements of the deck. Alongside, a wide field of study is open to new abutment configurations and innovation, as no unified procedure is available for their design and construction. In this framework, a new earthquake resistant abutment with high capacity wing walls is proposed and analytically investigated. The proposed abutment decouples the in-service response of the bridge from the backfill soil by small clearances at the expansion joints, which separate the deck from the abutment. During an earthquake the bridge movements are restrained by the high capacity wing walls and the backfill soil. The seismic performance of the new earthquake resistant abutment is evaluated by utilizing a benchmark bridge, whose design was based on Eurocodes, which has a relatively expensive isolation system with lead rubber bearings and dampers. Two alternative design schemes that utilized the seismic restraining effect of the proposed earthquake resistant abutment were re-designed and compared to the benchmark on the basis of seismic resistance and cost-effectiveness. The comparative results showed that the seismic participation of the proposed abutment with the backfill soil reduces effectively the seismic demand of the re-designed bridge schemes. Accordingly, the initial and the final bridge costs are effectively decreased, showing that the proposed unconventional design is a reliable scheme for future designs of bridges in earthquake-prone areas.
机译：基台不被认为是基于欧洲规范设计桥梁的抗震系统（ERS）的重要参与。但是，以前的研究表明，座式支座可以有效地减少桥梁的地震作用，尤其是在伸缩缝处的开口仅容纳甲板的可使用性运动时。同时，由于没有统一的程序可用于其设计和建造，因此对新的基台配置和创新也将进行广泛的研究。在此框架下，提出了一种新的抗震基台，该基台具有高容量的机翼墙并进行了分析研究。拟议的桥台通过伸缩缝处的小间隙将桥与在填土之间的缝隙分开，从而使桥梁的服务响应与回填土分离。在地震期间，桥梁的运动受到高容量的机翼墙和回填土的限制。新型抗震基台的抗震性能通过使用基准桥进行评估，该桥的设计基于Eurocodes，该桥具有相对昂贵的隔离系统，并带有铅橡胶轴承和减震器。根据抗震性和成本效益，重新设计了两种利用拟议抗震基台的减震效果的替代设计方案，并将其与基准进行了比较。比较结果表明，所提议的桥台与回填土的地震参与有效地降低了重新设计的桥梁方案的地震需求。因此，有效降低了桥梁的初始和最终成本，这表明所提出的非常规设计是地震多发地区桥梁未来设计的可靠方案。

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  • 来源
    《Engineering Structures》 |2014年第5期|35-44|共10页
  • 作者

    S.A.Mitoulis; M.D. Titirla; L.A. Tegos;

  • 作者单位

    Department of Civil and Environmental Engineering, University of Surrey, UK;

    Laboratory of Reinforced Concrete and Masonry Structures, Department of Civil Engineering, School of Engineering, Aristotle University of Thessaloniki, Greece;

    Laboratory of Reinforced Concrete and Masonry Structures, Department of Civil Engineering, School of Engineering, Aristotle University of Thessaloniki, Greece;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Bridge; Abutment; High capacity; Wing walls; Unconventional; Earthquake-resistant; Cost-effectiveness;

    机译：桥;邻接;大容量;翼墙;非传统的;抗震成本效益;

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