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| ANALYSIS ON DEFECTS OF BRIDGE STRUCTURE IN ENGINEERING PRACTICES |
| LU Lan-ping, ZHANG You-zhi |
| Engineering General Corporation, Lanzhou Railway Administration |
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Abstract The inner wall of bridge abutment creates partial defects during drilling holes. It is a macroscopic crack problem having clear geometric boundary. Based on the analyses of stress, strain and displacement along the whole boundary and at the front of cracks, the extension of cracks and the safety of structure are forecasted. During analyses, the internal defects distributed in materials are evolved and developed into macroscopic cracks having determinate geometric dimensions, and the statics properties under different applied loads before and after drilling holes in bridge abutment are researched. By using finite clement method, the elasticity analysis has been put forward on plane stress for abutment wall after drilling holes. The partial defects along the boundary of holes are analyzed also according to the scattered crack model. Through the discussions on the developed length and width of the cracks, the safety of bridge abutment after technical reform may be determined.
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Received: 20 July 2001
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2001, Vol. 18 
