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EFFECT OF GIRDER SHRINKAGE AND CREEP ON THE STRESSES IN DECK PAVEMENT OF LONG-SPAN BRIDGES

EFFECT OF GIRDER SHRINKAGE AND CREEP ON THE STRESSES IN DECK PAVEMENT OF LONG-SPAN BRIDGES,LIU XIAO-YAN,WANG GUANG-HUI,WEI CHENG-LONG,OUYANG XIANG-SEN

EFFECT OF GIRDER SHRINKAGE AND CREEP ON THE STRESSES IN DECK PAVEMENT OF LONG-SPAN BRIDGES  
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Damage to bridge deck pavement in China is regarded as a serious problem in highway engineering, which has many economical and social implications. The main objective of this paper is to present a calculation method and to analyse the stresses in pavement under long-term loads. Shrinkage and creep of concrete increase the vertical deflection of bridge girders. The deck pavement has the same displacement as the girder because they are bonded. Thus the shrinkage and creep of the girder concrete of a bridge will cause stresses in the deck pavement. This paper applies a finite element method to analyse the girder deflection by the shrinkage and creep of the concrete. It deduces a formula to analyse the stresses in the deck pavement and uses the Bu-Liu River bridge as a numerical example to investigate the loading characteristics of deck pavement. The computational results show that the tension stress and shear stress, which result from the shrinkage and creep of the girder concrete, should not be ignored.
Published in 2006.
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