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Showing 1 to 20 of 37 for “"box girder"”.
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Three-dimensional thermal analysis of curved concrete box girder bridges
… variations and the corresponding stresses in box girder bridges of arbitrary plan and cross-section geometry for a given geographic location and meteorological conditions. A comparison is made between the results obtained from the analytical solution and temperature measurements obtained by …
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Transverse and Longitudinal Bending of Segmental Concrete Box Girder Bridges
Post-tensioned segmental concrete box girders have been in use in the United States since the early 1970s. This unique bridge system uses post-tensioning to connect many smaller concrete bridge segments into very efficient long span bridges. However, because of the slender components, localized …
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The structural behaviour of horizontally curved prestressed concrete box girder bridges
… Recently the horizontally curved box girder bridge has become more desirable inmodern motorway systems and big cities. Even though numerous amounts of research have beenin progress to analyse and understand the behaviour of all types of box-girder bridges, the resultsfrom these …
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Design of a cable-stayed precast post-tensioned box girder bridge
… the field of cable-stayed post-tensioned precast box girder technology and construction is presented. Likewise, a preliminary design for a 600 foot main span cable-stayed post-tensioned box girder bridge is presented. The analysis considers dead load, and live loadings acting on the girder using …
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Seismic Response and Analytical Fragility Functions for Curved Concrete Box-Girder Bridges
… curvature of bridges, specifically concrete box-girder bridges. This study aims to fill in the gap on the current state-of-the-knowledge in the seismic response and vulnerability of curved concrete box-girder bridges.Since this bridge type is common in California, the modern details adopted …
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Performance and Design of Anchorage Zones for Post-Tensioned Box Girder Bridges
Post-tensioned box girder bridges are very common form of bridge construction. The post-tensioning anchorage zone is the location where very large prestressing forces are applied to the box girder, and then spread into the box section. The spreading of the large compressive forces creates …
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Evaluation of redundancy in trapezoidal box-girder bridges using finite element analysis
… of a bridge. The tension flanges of twin box-girder bridges are thus labeled as fracture-critical. In order to avoid the catastrophic collapse suggested by the AASHTO specifications, fracture-critical bridges, constituting 11% of all steel bridges in the country, are subjected to frequent …
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Seismic Vulnerability Assessment of As-Built and Retrofitted Multi-Frame Box-Girder Bridges
… for old and new multi-frame reinforced concrete box-girder bridges. Since long-term deterioration of existing bridge infrastructure is clearly a growing cause of concern, both the non-deteriorating and deteriorating columns with different levels of reinforcement corrosion was considered to …
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Analysis of time-dependent effects on segmental prestressed concrete curved box-girder bridges
… of segmentally erected curved prestressed box-girder bridges and other structures. The program is capable of predicting the response of such structures throughout their various stages of construction and service load history. The analysis accounts for the effects of concrete creep and …
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Torsional Ground Motion Effects on the Seismic Response of Continuous Box-girder Highway Bridges
… codes. For this purpose, continuous concrete box-girder highway bridges were considered and torsional ground motion effects on these bridges were investigated in two phases. Firstly, the upper and lower bound effects of torsional ground motions (TGMs) on the seismic response of highway bridges …
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Lessons learned in the design and erection of box girder bridges from the West Gate collapse
… The West Gate Bridge is one of a number of box girder bridges built during the mid 20th century, and was one of four to fail in a three year period. An overview of the design and erection issues is presented, particularly those dealing with thin elements in compression. A comparison of …
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The First Moving Load Simulator for Testing Bridges in Canada and its Application on a Full Scale Precast Box Girder
… to test a full scale B900 prestressed concrete box girder. The aim of the experiment was to verify that the MLS can apply cyclic loading in a controlled laboratory environment, under realistic highway scale 'rolling wheel loads', determined through code procedures as well as through finite …
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An investigation into the usefulness of a method of analysis for straight, uniform-section, box-girder bridge decks with side cantilevers
… single-cell, uniform-section concrete box-girder bridge-decks with side cantilevers. This method only requires a calculator for execution and if a computer is used, results for maximum stresses may be obtained almost immediately. The authors state that since their method does not …
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Redundancy Evaluation of Fracture Critical Bridges
… of fracture critical bridges, specifically three girder bridges and twin box-girder bridges. The effect of various loading, analysis and geometric parameters on the post fracture response and the remaining load carrying capacity of the damaged bridge is evaluated through nonlinear finite element …
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Elastomeric bearings in high demand applications : numerical study and experimental validation
… of elastomeric bearings in two steel trapezoidal box girder systems in Central Texas, the use of elastomeric bearings in high-demand application is nevertheless largely impeded by historical and current bearing design provisions at national and state levels that are unduly restrictive for …
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