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《Sichuan Building Science》 2011-01
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Calculation and study on deck's local stress in orthotropic steel box girder of highway bridge under standard loads at home and abroad

WU Zhenwang,ZHENG Kaifeng,GOU Chao,LIU Peng(School of Civil Engineering,Southwest Jiaotong University,Chengdu 610031,China)  
Concerning vehicle,wheel and vehicle axle loads suitable for deck's local stress analysis in orthotropic steel box girder of highway bridge,the differences on codes of China,America,Canada,Japan,U.K.and Europe were studied.After selecting 8 standard loads,according to wheel contact area and diffusion effect of 50mm pavement layer,pressure areas were determined.Based on the typical structure of steel box girder selected,deck's local stress was calculated under action of these loads respectively.For the load case of applying these loads at midpoint of slings,transverse stress at top and bottom of the deck and longitudinal stress at bottom of rib here was studied.For the load case of applying these loads at supporting point of slings,longitudinal stress at top and bottom of the deck here was studied.Furthermore,without pavement diffusion effect,the above stress was researched under actions of the 8 loads selected.The results show that calculated stress of deck is relatively lower under action of the grade I highway vehicle load of China,and the effects from the shape and size of pressure area are more significant.
【CateGory Index】: U441
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