Analysis And Research On Force Bearing Properties Of Bridge Deck Pavement Of Long-span Concrete Continuous Rigid Frame Bridge

With the increasing of the traffic and heavy vehicle, the damage to the bridge deck pavement, which influences traffic seriously, has caused a severe economical loss and a bad influence on society. The issue of bridge deck pavement has become a widespread concern because of its influence upon the use of expressway. It is necessary for us to pay much attention to the bridge deck pavement as early as possible, to explore its stress characteristic clearly.This dissertation analyses the main destruction type of the concrete bridge deck pavement of asphalt concrete and summarizes the research situation of the bridge deck pavement of asphalt concrete at home and aboard. Considering the contact stress between the tire and bridge deck pavement is nonlinear obviously, this dissertation gives up the approximate model of circle or rectangle uniform load within traditional analysis. This dissertation carries on the earth test upon the auto tire. According to the experiment result, it does the emulation analysis to the contact stress using finite element method and then puts forward the non-linear wheel load model of single and double wheel. Using the computation schema of the contact surface which is deduced in this dissertation, it analyzes stress characteristic of the deck pavement of long-span concrete continuous rigid frame bridge. This dissertation analyzes stress of the bridge deck pavement under these circumstances: shrinkage and creep of girder concrete, variation in bulk temperature, variation in local temperature under wheel load, different position of wheel load and etc. and uses superposition principle and differential coefficient relation of deformation and internal force to calculate the maximum stress which may appear in the pavement and inter-layer between pavement and deck slab. The first department stress of the pavement, the second one and the third one can be got by separating the maximum stress. From the computational results it can be concluded the main reasons of the pavement destruction. While doing the fine partial analysis, this dissertation analyzes different boundary condition of the partial model and gets some beneficial conclusions which provide the reference for structural computation.