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A stress-based fatigue life evaluation of two steel bridges along I-95 in Delaware.

机译:特拉华州I-95沿两座钢桥的基于应力的疲劳寿命评估。

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摘要

This study presents a fatigue life evaluation of two steel-girder bridges along I-95 in Delaware. Both bridges are three-span simply-supported with composite deck construction. The evaluation methods used are based on NCHRP Report 299. Truck traffic is estimated from 2004 traffic summary data recorded by officials at the Delaware Department of Transportation. The standard 54-kip effective fatigue truck is used to represent the truck weight spectrum experienced by the bridges over their lives. Effective stress ranges are computed using basic methods of structural analysis including: influence line method, AASHTO lateral distribution factors, and average bending stress computation.; Both bridges, Br. 708 and Br. 746, were determined to have infinite fatigue life at their midspan locations. Also, Br. 746 possesses sufficient fatigue life at the termination locations of its bottom cover plate. However, Br. 708 does not have sufficient remaining fatigue life at the termination locations of its bottom cover plate.
机译:这项研究提出了沿特拉华州I-95的两座钢梁桥的疲劳寿命评估。两座桥均为三跨,由复合甲板结构简单支撑。所使用的评估方法基于NCHRP报告299。卡车交通是根据特拉华州交通运输部官员记录的2004年交通摘要数据估算的。标准的54公斤有效疲劳卡车被用来代表桥梁在使用过程中所经历的卡车重量谱。有效应力范围使用结构分析的基本方法计算,包括:影响线方法,AASHTO横向分布因子和平均弯曲应力计算。两座桥,Br。 708和Br。 746,被确定在其中跨位置具有无限的疲劳寿命。还有,Br。 746在其底部盖板的终端位置具有足够的疲劳寿命。但是,Br。 708在其底部盖板的终端位置没有足够的剩余疲劳寿命。

著录项

  • 作者

    Fink, Elliot G.;

  • 作者单位

    University of Delaware.;

  • 授予单位 University of Delaware.;
  • 学科 Engineering Civil.
  • 学位 M.C.E.
  • 年度 2006
  • 页码 64 p.
  • 总页数 64
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 建筑科学;
  • 关键词

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