Research On Transverse Stress State Of Hollow Slab Bridge After Widening And Reconstruction

Despite the fact that China’s highway mileage has increased in recent years,the growth rate has decreased significantly,which also means that the number of new bridges will show a decreasing trend year by year.In contrast,due to the early construction of the bridge disease and lack of traffic capacity,so the bridge reinforcement,the transportation industry is paying more and more attention to widening and maintenance technology,and it has become an important topic for domestic and international scholars.The transverse load distribution of a damaged,widened,and strengthened hollow slab bridge is investigated using the finite element method in this paper.The widening and reconstruction effect of a hollow slab bridge is investigated by comparing the transverse load distribution coefficient of the bridge under different widening methods and different reinforcement methods.First of all,this paper summarizes existing bridge load transverse distribution calculation methods and their applicability,and then selects the appropriate calculation method as the theoretical basis based on the hinge joint stress characteristics of hollow slab bridges.carries on the theoretical calculation and ANSYS finite element simulation for the hollow slab bridge case used in this paper,showing that the ANSYS model can effectively simulate the performance of hollow slab bridge Lateral distribution of load through comparison of calculation results.Secondly,the hinge joint damage model and the hollow slab bridge widening model are based on the original hollow slab bridge.The transverse distribution influence lines of each hollow slab were compared before and after widening,as well as under various widening modes,it is found that the widened new slab can effectively share the load borne by the original hollow slab bridge,and the load borne by each slab after two-way widening is more uniform than that under one-way widening.Finally,the transverse load distribution of a damaged hollow slab bridge is calculated and analyzed using the bonding steel plate reinforcement method and the external prestressing reinforcement method.The findings show that both methods of reinforcement can effectively strengthen damaged hinge joints,improve the integrity of the existing damaged hollow slab bridge,and make each slab more evenly share the load acting on the hollow slab bridge.