Analysis of Structural Static Response of Continuous Rigid Frame Bridges Under Parameter Errors
During the construction of continuous rigid frame bridges,both subjective and objective factors can affect the construction quality and safety of the bridge structure.This paper used the finite element model established in an actual engineering project to analyze the structural response under the influence of dead load,tendon tension of steel cable,and closure temperature during the maximum cantilever construction phase and the bridge completion stage.The results show that segmental dead load affects the structural deformation under maximum cantilever conditions.However,the tendon tension of bottom steel cable has no significant impact on the main girder deformation,while top slab tension affects the main girder deformation within a±15%range.The closure temperature largely affects the mid-span deformation of the main span,with minimal impact on the edge span and negligible effect on the stress of the main girder during bridge completion.
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