Study On Loading Capacity And Reinforcement Measures Of Hollow Slab Beam Bridge Subjected To Fire

After the bridge structure suffered of fire, mechanical properties of the affectedbridge changes, residual stiffness may drop, serious ones may collapse. As to hollowslab beam bridge, after fire, the appraisal of residual stiffness and research ofreinforcement method and its verification are important to the recovery of traffic. To ensurethe proper use of bridge, we have to use some proper methods to solve the disease,which can improve the residual stiffness and ensure safety and money.The researchwas supported by National Natural Science Foundation of China (Grant No.51308056)--stduy on analysis method of bearing capacity and decaying mechanism ofeffective prestress for concrete bridge subjected to fire. The main research work：（1）This paper elaborates the features of residual stiffness of hollow slab beambridge which suffered of fire hazard through the thermo-mechanical coupling analysisbased on the method of numerical simulation.（2）Based on vast of test data and reliable theoretical analysis, check theresponse of hollow slab beam bridge under different load ratio based on the measureddata of loading test. Judge the residual stiffness through the strength and stiffness.（3）Provide a theoretical basis for the reinforcement and strengthening methodsto verify the effect.