Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Analysis of Prestressed Concrete Jointless Bridges with Integral Abutments
It is well known that thermal and time-dependent effects induce volumetric changes in bridge superstructures. Resulting movements have historically been accommodated through the use of expansion joints and bearings. Transportation departments have encountered problems with such systems in long-term service and maintenance. Elevation changes associated with successive paving must be eventually addressed by repositioning of joints. Corrosion of girder ends, bearings, and substructure members, is accelerated by leaking through deck joints of water, which can be laden with deicing chemicals. This leaking is an aesthetic concern as well. Loose materials that find their way into expansion joints from the roadway reduce the ability of the superstructure to expand, and can cause further deterioration of the joint. Joints are susceptible to wear from traffic, especially that of snowplows. With this issue come undesirable driving surface conditions associated with roadway discontinuity at the joint. High costs of expansion bearings are not justified, considering their potential for failure that is brought on by increased friction due to corrosion or loss of lubrication. Moreover, high costs are associated with manufacturing, installation, and repair and maintenance of expansion joints and bearings.
Analysis of Prestressed Concrete Jointless Bridges with Integral Abutments
It is well known that thermal and time-dependent effects induce volumetric changes in bridge superstructures. Resulting movements have historically been accommodated through the use of expansion joints and bearings. Transportation departments have encountered problems with such systems in long-term service and maintenance. Elevation changes associated with successive paving must be eventually addressed by repositioning of joints. Corrosion of girder ends, bearings, and substructure members, is accelerated by leaking through deck joints of water, which can be laden with deicing chemicals. This leaking is an aesthetic concern as well. Loose materials that find their way into expansion joints from the roadway reduce the ability of the superstructure to expand, and can cause further deterioration of the joint. Joints are susceptible to wear from traffic, especially that of snowplows. With this issue come undesirable driving surface conditions associated with roadway discontinuity at the joint. High costs of expansion bearings are not justified, considering their potential for failure that is brought on by increased friction due to corrosion or loss of lubrication. Moreover, high costs are associated with manufacturing, installation, and repair and maintenance of expansion joints and bearings.
Analysis of Prestressed Concrete Jointless Bridges with Integral Abutments
Knickerbocker, David (Autor:in) / Basu, P. K. (Autor:in)
Structures Congress 2004 ; 2004 ; Nashville, Tennessee, United States
Structures 2004 ; 1-10
21.05.2004
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
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