| In the recent decades,With the rapid development of highway,curved bridges are established increased progressively with time,and the length of span is increasing.The long-span curved bridges are statically indeterminate structure.To this structure, its alignment and internal force are closely related to its construction. Different constructing methods and construction procedure often leads to different alignment and internal force. In design process,design parameter(such as: curvature radius, concrete elasticity modulus, concrete shrinkage and creep,the loss of prestressing force, construction load, temperature action) usually based on the code or design experience.Then the determination of parameter will be inaccurate and cannot coincide with the actual state.To the middle and small span bridges,the fluence of the deviance is not obvious.But to these long-span curved continuous girder bridges(mostly use cantilevered construction), with the increasing of the cantilever length of the bridge,the alignment will deviate from the designed values distinct during the construction,which will lead to the difficulty of closure. After the closure of the bridge, the inaccurate calculation of the concrete shrinkage and creep & can also lead to the alignment deviate from the designed values,and will cause sub-internal force which would change the internal force. Therefore, bridge monitor is of great importance to these long-span curved continuous girder bridges.This paper contains as follows:(1) The influence of curvature radius to the internal force and alignment of the curved girder bridges.(2) The influence of temperature change to the internal force and alignment of the curved girder bridges.(3) The influence of concrete shrinkage and creep to the internal force and alignment of the curved girder bridges. (4) The influence of prestress parameter, concrete density, concrete modulus of elasticity to the internal force and alignment of the curved girder bridges.
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