简支梁桥下部结构抗地表残余变形数值研究

Mining underground mineral resources will cause surface subsidence and sustained residual deformation within a certain period, which will seriously affect the safe use of ground structures. Therefore, as for bridges to be built in mined-out areas, analysis and evaluation on anti deformation capacity against ground surface residual deformation must be taken. Based on the design of the simple beam bridge in a certain mining subsidence area in Jining, Shandong, this paper provides a numerical analysis of the anti deformation capacity against ground surface residual inclined deformation of its substructure by means of ANSYS. Conclusions are drawn as follows: Residual inclined deformation has significance influence on the substructure of bridge. It mainly influences piles and columns while it has small influence on coping. Under the condition of residual inclined deformation, the increase amplitude of tensile stress of bridge's substructure is lager than that of compressive stress of bridge's substructure. The substructure of the bridge needs structure reformation and strengthening.