Experiment Study And Mechanism Analysis On Concrete Bridge Asphaltum Concrete Overlay Structure

Fiber Bragg Grating strain sensor is a new sensor that is developing rapidly in recent years. Its security has not been very known by people up to the present because it applys in the civil engineering structures in a short time in domestic and overseas. Nowadays many experiments on the performance of Vibrating Wire Sensors contrast to FBG sensors which are placed in a concrete beam are applying in the large civil engineering structures, in order to demonstrate the FBG sensing technology can apply in bridge structure monitoring completely.This paper is based on the reinforcement load experiment,which is FBG sensors's numerical value contrast to strain gauge's numerical value.to approve FBG sensing technology is feasible and secure. Moreover.the effect of CFRP reinforce bridges is evaluated by the numerical value of reinforcement former and after in this paper.Before analyzing a T-Shaped beam bridge of pre-stress concrete about the concrete bridge asphaltum concrete overlay structure, some compute model of the concrete composite deck pavement is introduced in this paper.Then a Finite-element model of real pre-stress concrete bridge is selected to analyze the force of the concrete composite deck pavement.In the Finite-element model of real pre-stress concrete bridge.it is a keypoint and difficulty to simulate the pre-stree steel, and the way of establishing respectively then coupling is selected to simulate the pre-stree steel in this paper.In the precondition of simulating the real pre-stress concrete bridge exactitudely and factually, analyze the force of the concrete bridge asphaltum concrete overlay structure, under the conditions of different sidewards load and different lengthways load.and then point out the worst condition of load.In succession study the force of the asphaltum concrete overlay under the different axis load and different level load, and then point out that the phenomenon of over loading and applying the brake or driving abnormally is a disadvantage to the asphaltum concrete overlay .At last study the force of the asphaltum concrete overlay under the condition of variety parameters of he concrete bridge asphaltum concrete overlay structure.After studying the force of the asphaltum concrete overlay, probe into the design method of composite deck pavement with bridge cover.Establish the theory model of composite deck pavement with bridge cover and corresponding equation.and give the way of compute in the equation.At last check computations the interbedded shearing force and surface shearing force and surface pull force of the asphaltum concrete overlay with bridge cover.