Study on force calculation method of continuous deck segment considering the constraints of deflection and rotation
The use of continuous deck structures instead of expansion joints is an effective approach to reduce the maintenance cost of simply supported girder bridges and achieve lifetime maintenance-free joints.However,the existing calculation method overestimates the bearing force of the continuous deck segment,resulting in a significant increase in the reinforcement of the design.This not only increases the construction cost,but also increases the restraining effect of the continuous deck segment on the girder and changes the force state of the continuous deck structure,making it difficult to meet the rational design requirement.To solve this problem,a calculation method for the bearing force of the continuous deck segment was proposed by considering the deformation harmony of the deck and the girder under the constraints of deflection and rotation,and then the calculated forces by the proposed method were compared with the experimental values and the results obtained from the existing calculation methods.The results show that the forces obtained by all the calculation methods are greater than the experimental values,with the results of the proposed method being the smallest and showing the greatest agreement with the test values,and the error range of the reinforcement stress is from 17.66％to 30.27％,which validates the effectiveness of the proposed method.Finally,the practical method for determining the bearing force of the continuous deck segment was presented by taking the continuous deck concrete simply supported T-girder bridge as an example.The proposed method has a clear physical interpretation,a simple calculation process,and a higher prediction accuracy.
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维普
