In view of the continuous rigid frame bridge which has to adopt the main piers with large height difference due to the constraint of the construction conditions,the box-double thin-walled composite pier is used as the main pier structure,and the corresponding main pier stiffness matching design method is proposed.The stiffness calculation process is deduced,and the calculation formula of the anti-pushing integrated stiffness of the composite pier top in the bridge direction is obtained.The results of the proposed main pier design and the traditional design are compared with the actual bridge calculation example.The results show that the stiffness matching design method of box-double thin-walled composite main pier proposed in this paper can effectively avoid the problem of uneven internal force distribution caused by the height difference of the main pier,so as to improve the mechanical performance of continuous rigid frame bridges with high and low main piers under horizontal loads such as temperature and braking force,and improve the seismic performance of the structure.
continuous rigid frame bridgebox-double thin-walled composite main pierstiffness matching
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