Study On The Reinforcement Of Prestressed Concrete Of Hollow Board Bridge

The reinforced concrete simple beam bridge has been the leading bridge type in our countrg for a long time. because of it's simple designing, simple and convenient constructing, it is a form that often adopts of the economic developing period of our country. Follow the change of design and operation, reason maintained and design standard, rapid increase of volume of traffic in addition, large-scale load vehicle and factor of the over laden vehicle. Propping up the armored concrete bridge to present defect and damage in various degree simply in services, So measure and bear the weight of the evaluation of strength to the structure in the services bridge and improve extremely urgently.This article has carried on the system examination, the computation and the fundamental research analysis to there enforcement spatial core index of correlation as well as thestructural theory bearing capacity, and has not destroyed the load experimental study through the reinforcement prestressed concrete spatial core, the ground-to-air core carries on the destruction mechanism and the limit bearing capacity evaluates. Take this as the foundation, separately uses the compression zone to enlarge cross section and pulled the area to glue the carbon fiber cloth to the prestressed concrete spatial core the reinforcement, and after the reinforcement prestressed concrete spatial coredestraction load experimental experiments, the discussion different structure makes up the strong measure to the old bridge prestressed concrete hollow board limit supporting capacity, the destruction mechanism , the influence, it is proposed the reasonable and feasible measures on old bridge prestressed concrete spatial core reinforcement makes up the strong plan and the correlation suggestion. The union finite element thought, separately uses computational procedure of the MIDAS and the ANSYS carries on the endogenic force computation analysis to the structure, tallies quite unanimously with the test result, two kind of reinforcement makes up the strong measure all to have the varying degree to the structure supporting capacity the enhancement, further has proven regarding at present in the small span-bridge, the stress situation uses these two kind of reinforcement method reinforcement based on "the veneer stress" the usability and the reliability, has provided the basis and the rationale for the old bridge reinforcement construction.