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Shear and flexural capacity of high strength prestressed concrete bridge girders.

机译：高强度预应力混凝土桥梁的抗剪和抗弯承载力。

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摘要

The section of highway over the 400 South roadway in Orem, Utah is made up of two separate three span bridges. The bridges were originally constructed in 1960 and were expanded in 2004 to accommodate for one extra lane per bridge. During the fall of 2012 both bridges were scheduled for demolition and four girders were salvaged from the southernmost span of the 2004 expansion. These girders were transported to the Structural Materials And Systems Health Lab (SMASH Lab) where a series of tests were performed to determine the prestressing losses, flexural, shear, and shear-flexure capacity of the girders. The results of these tests were compared to the American Association of State Highway and Transportation Officials Load Resistance Factored Design (AASHTO LRFD) Bridge Design Specifications and an ANSYS Finite Element model. For all test results the AASHTO Bridge Design was conservative for each test setup and was able to predict the type of failure that occurred. The finite element model was developed for the four test conditions and calibrated so as to accurately represent test data. The calibrations were compared to actual tested material properties to determine the difference between the theoretical model and the girders.
机译：犹他州奥勒姆市400 South公路上的高速公路部分由两座独立的三跨桥组成。桥梁最初建于1960年，并于2004年进行了扩建，以容纳每条桥梁一条额外的车道。 2012年秋季，两座桥梁均计划拆除，并且从2004年扩建工程的最南端抢救了四个大梁。这些大梁被运送到结构材料与系统健康实验室（SMASH Lab），在其中进行了一系列测试以确定大梁的预应力损失，挠曲，剪切和剪切挠曲能力。将这些测试的结果与美国国家公路和运输官员协会的抗荷载因素设计（AASHTO LRFD）桥梁设计规范和ANSYS有限元模型进行了比较。对于所有测试结果，AASHTO桥设计对于每个测试设置都是保守的，并且能够预测发生的故障类型。针对四种测试条件开发了有限元模型，并对其进行了校准，以准确表示测试数据。将校准结果与实际测试的材料特性进行比较，以确定理论模型与大梁之间的差异。

著录项

  • 作者

    Higgs, Arek.;

  • 作者单位

    Utah State University.;

  • 授予单位 Utah State University.;
  • 学科 Engineering Civil.;Transportation.
  • 学位 M.S.
  • 年度 2013
  • 页码 121 p.
  • 总页数 121
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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