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首頁> 外文學(xué)位 >Flexural, shear, and punching shear capacity of three 48-year-old prestressed lightweight concrete double-tee bridge girders.
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Flexural, shear, and punching shear capacity of three 48-year-old prestressed lightweight concrete double-tee bridge girders.

機(jī)譯：三個48歲的預(yù)應(yīng)力輕質(zhì)混凝土雙三通橋梁的彎曲，剪切和沖壓剪切能力。

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摘要

The Icy Springs Bridge in Coalville, Utah carries 2nd South Street over the Weber River west of Interstate 80. The bridge is owned by Coalville City and was originally constructed in 1965 as a single-span 51-foot long bridge using prestressed concrete double-tee girders. In the fall of 2013 the original bridge was replaced with a new 80-foot long single span bridge using prestressed concrete decked bulb-tee girders. The original girders were salvaged and transported to the Systems, Materials, and Structural Health Lab (SMASH Lab) where a series of tests were performed to determine the prestressing losses, the flexural and shear capacities of the girders, and the punching shear capacity of the reinforced concrete deck. The results of these tests were compared to the 2012 American Association of State Highway and Transportation Officials Load and Resistance Factor Design (AASHTO LRFD) Bridge Design Specifications and a finite element model using the computer program ANSYS. For the shear and punching shear test results, the AASHTO LRFD Bridge Design Specifications was conservative and was able to predict the type of failure that occurred. However, the tested flexural results were below the calculated flexural capacities using the AASHTO LRFD Bridge Design Specifications. A finite element model was created and calibrated to the test results for the various loading and support conditions. The actual tested material properties were compared to the material properties used in the finite element analyses to determine the difference between the actual girders and the theoretical models. Funding for this project was provided by the Utah Transportation Center.
機(jī)譯：猶他州卡爾維爾的冰冷泉橋在80號州際公路以西的韋伯河上載有第二南街。該橋歸卡爾維爾市所有，始建于1965年，為單跨51英尺長的橋，采用預(yù)應(yīng)力混凝土雙三通大梁。在2013年秋天，原來的橋被新的80英尺長的單跨橋所取代，該橋使用預(yù)應(yīng)力混凝土甲板球泡三通梁。將原始大梁打撈起來并運(yùn)輸?shù)较到y(tǒng)，材料和結(jié)構(gòu)健康實(shí)驗(yàn)室（SMASH實(shí)驗(yàn)室），在那里進(jìn)行了一系列測試，以確定大梁的預(yù)應(yīng)力損失，彎曲和剪切能力以及沖切能力。鋼筋混凝土甲板。將這些測試的結(jié)果與2012年美國國家公路和運(yùn)輸官員協(xié)會荷載和阻力因子設(shè)計(jì)（AASHTO LRFD）橋梁設(shè)計(jì)規(guī)范以及使用計(jì)算機(jī)程序ANSYS的有限元模型進(jìn)行了比較。對于剪力和沖剪力測試結(jié)果，AASHTO LRFD橋梁設(shè)計(jì)規(guī)范是保守的，能夠預(yù)測發(fā)生的破壞類型。但是，測試的彎曲結(jié)果低于使用AASHTO LRFD橋梁設(shè)計(jì)規(guī)范計(jì)算出的彎曲能力。創(chuàng)建了一個有限元模型，并針對各種載荷和支撐條件對測試結(jié)果進(jìn)行了校準(zhǔn)。將實(shí)際測試的材料特性與有限元分析中使用的材料特性進(jìn)行比較，以確定實(shí)際大梁與理論模型之間的差異。該項(xiàng)目的資金由猶他州交通中心提供。

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  • 作者

    Pettigrew, Christopher S.;

  • 作者單位

    Utah State University.;

  • 授予單位 Utah State University.;
  • 學(xué)科 Engineering Civil.
  • 學(xué)位 M.S.
  • 年度 2014
  • 頁碼 208 p.
  • 總頁數(shù) 208
  • 原文格式 PDF
  • 正文語種 eng
  • 中圖分類
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