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| Analysis of Shrinkage and Creep Effects on New Steel-concrete Composite Deck System for Suspension Bridge |
| WANG Da, LIU Yang, CHEN Hai-feng |
| School of Civil Engineering and Architecture, Changsha University of Science & Technology, Changsha Hunan 410114, China |
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Abstract To study the shrinkage and creep of the new steel-concrete composite deck system of a suspension bridge, an equivalent calculation method based on the existing calculation theory of shrinkage and creep with changing temperatures and creep guidelines was proposed. Two different validation analysis models were established for the same structure using two large popular finite element programs. The validity and accuracy of the equivalent results were verified, and the equivalent method was found to be practical, feasible, and highly accurate. A fine segment model for the steel-concrete composite bridge deck system of a suspension bridge was created with the use of ANSYS finite element program. Further research was conducted on the effect of shrinkage and creep on a composite structure using the proposed equivalent calculation method. Research results for the new class of steel-concrete composite bridge deck indicate that the concrete shrinkage effect is dominant, but the creep effect is relatively insignificant. These results may be related to the concrete loading age. The effect of shrinkage and creep on the stress state of the bridge deck and the longitudinal steel truss are significant. However, the effect on the steel truss is not significant.
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Received: 25 August 2014
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| Fund:Supported by the National Basic Research Program of China (973 Program) (No.2015CB057701);the National Natural Science Foundation of China (No.51308071, No.51378081);the Natural Science Foundation of Hunan Province (No.13JJ4057);the Open Foundation of Innovation Platform in Hunan Provincial Universities (No.12KB76) |
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2015, Vol. 9 
