|
In this paper, a span of 20 meters of precast hollow simply supported girder bridge as the basis , the use of finite element software, theoretical calculation and the real bridge load test a combination of methods , carried out Charpy precast hollow slab bridge modeling technique . The main research work and achievements are as follows: an overview of precast hollow slab bridge and development , and its main characteristics are reviewed to introduce domestic precast slab bridge superstructure finite element studies and the present situation of the problems and the the main thesis work . 2 , the use of grillage established precast hollow space simply supported beam bridge finite element model . 3 , carried out lateral connections, number of beams , pavement , bearing , fence and other parameters of the sensitivity analysis, the impact of precast slab bridge superstructure calculated sensitivities . The results show that : connections between the main beam and the support of these two factors influenced transverse load distribution , railings , followed Pavement less affected ; For the span of 20m precast slab bridge , as long as beams spaced not more than 2m, the calculation results can be neglected . 4, the real bridge static load test and comparative analysis of theoretical calculations showed that: In accordance with the arrangement of field test loads , whether it is positive or upload partial load, are laterally rigid model for the calculation results with the experimental data closer , and flexibility the results support the general support than the slightly better results , indicating lateral connections to rigid and flexible support for the finite element model more in line with the actual type of bridge force status .
|