Affiliation:
1. Department of Bridge Engineering, Tongji University, Shanghai 200092, China
Abstract
Serious cracks were found in the pylon of a cable-stayed bridge without backstays. Based on forensic damage investigation, this paper uses the finite element (FE) method incorporating Building Information Modeling (BIM) to analyze the causes of cracking. The BIM model is established based on the survey of design, construction, and service information of the bridge. Then, FE analysis is conducted using BIM information. Finally, the causes of cracking in different regions of the pylon are explained in detail. The results show that the FE simulation agrees well with the inspected distribution of cracks, and the causes of cracks are closely related to the pylon construction process. The main cause of the cracks is the shrinkage difference between concrete segments of different ages. The anchorage effect of stayed cables also causes inclined cracks perpendicular to the cable direction. The combination of temperature load and concrete shrinkage results in cracks at the root of the pylon, and the reduction in cable forces exacerbates the cracking.
Funder
Department of Science and Technology of Guangdong Province
Fundamental Research Funds for the Central Universities
Guangdong Transportation Group Science and Technology Project
Reference34 articles.
1. Recent Evolution of Cable-stayed Bridges;Virlogeux;Eng. Struct.,1999
2. Pollalis, S.N. (1999). What Is a Bridge? The Making of Calatrava’s Bridge in Seville, The MIT Press.
3. Gimsing, N.J., and Georgakis, C.T. (2011). Cable Supported Bridges: Concept and Design, John Wiley & Sons.
4. The Marian Bridge, Czech Republic;Kominek;Struct. Eng. Int.,1998
5. Design and Experimental Study of a Harp Shaped Single Span Cable-stayed Bridge;Shao;J. Bridge Eng.,2005