Effects Analysis of Web Cracks on Long-Term Deformation of Large Span Pre-Stressed Concrete Continuous Box Girder Bridge

Abstract:

Excessive deflection and its long-term sustainable development has become a common disease of large span pre-stressed concrete continuous box girder bridge, but the causes of it is difficult to reach consensus. A three-spans continuous pre-stressed concrete box girder bridge is studied in this paper. The web inclined cracks near L/4 of the continuous girder bridge is simulated by FEM (finite element method), in order to explore the influences of web inclined cracks near L/4 on the overall deflection of the bridge and the effect differences of the crack width, length and numbers. The results show that when the web inclined cracks reach a certain level, it will cause a long-term sustainable development of the deflection of the bridge. Therefore, web inclined crack is the main factor that causes the sustainable development of long-term deflection of large span pre-stressed concrete continuous box girder bridges.

• Periodical: Advanced Materials Research (Volumes 163-167)
• Pages: 1207-1212
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.163-167.1207
• Online since: December 2010
• Authors: Fei Shao, Da Rong Pan, Feng Li, Ya Wen Liu
• Keywords: Continuous Box-Girder Bridge, Finite Element Model (FEM), Long-Term Deformation, Prestressed Concrete, Web Crack

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DOI: 10.4028/www.scientific.net/amr.163-167.1207

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