Abstract

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Title:: Crack Resistance Analysis on Prefabricated RC Slab Bridge Under Heavy Traffic

Author(s):: ZHAO Shi-liang; HAN Wan-shui; LU Yong-fei; LIU Xiang-ru; YAN Li; WANG Xiang-rong; Management Office of Shijiazhuang 3rd Ring Road

Keywords:: bridge engineering; prefabricated RC slab bridge; heavy traffic; crack resistance analysis; crack width

Abstract:: In order to study the crack resistance of RC slab bridge under heavy traffic, 883 extraheavy truck cases were extracted from the Xuanda highway Weighinmotion (WIM) data, which was used for coal transportation. The sagging moment effect of RC slab bridge under the extraheavy truck cases was calculated by selfdeveloped threedimensional analysis software BDANS. Furthermore, the crack widths of midspan section of RC slab bridge were achieved according to the realizing method which was listed in current bridge standard. The results show that the crack width of midspan section of RC slab bridge caused by extraheavy truck is within the scope of 0.10.2 mm and it does not exceed the maximum crack width of the relevant provisions. While the existing of these cracks will provide an ideal circumstance for the carbonation of concrete and electrochemical corrosion of the rebar. In order to ensure the serviceability and extend the service period of structures, some preliminary repairs for the cracks and study on vehicle load limitation of highway bridges should be done.