Mixed Prestressed Reinforcement Theory Research And The Flexural Behavior Finite Element Simulation About Reinforced Concrete T Beam

Active bridge reinforcement is a realistic subject, first of all in dueling economic new Bridges can save investment, avoid the waste of money, second, general reinforcement project time limit for a project is the shorter of the new construction, it can obtain good social benefit in the short run. A lot of current active flexural strengthening technology of prestressed concrete bridge components, due to the restriction of material performance, general need reinforcement effect is realized by using the permeability of high performance high strength mortar, and result in strengthening cost is higher. About mixed flexural concrete members prestressed reinforcement theory, this paper using the method of pre and after zhang method applied to be reinforcement structures at the same time, make the Bridges have corresponding prestressing in active service and meet the design requirements, at the same time, generally the infiltration of high performance cement mortar will be made by ordinary cement mortar to replace. First, it can reduce the cost of reinforcement project; secondly, to get the site protection mortar reinforced materials created the convenience, the mixture of prestressed reinforcement theory offers a new way for prestressed reinforcement bridge area in active service.For validation mixed prestressed reinforcement theory, sorting and analyzing a large amount of literature, solve the problem of old and new concrete surface bonding, using the existing old and new, in combination with surface treatment method, can realize the joint surface in the bridge between the old and the new service period good collaborative force. According to the mechanics calculation of various load and stress stage structures control section edge edge in tension and compression stress conditions change, the mixture of prestressed reinforcement theory is proved to be correct. Using the finite element analysis software Midas theoretical calculation model for the numerical analysis, compare the theoretical calculation and numerical analysis results, showing the validity of hybrid prestressed reinforcement theory. Combined with an engineering example for the hybrid Midas finite element numerical simulation of prestressed reinforcement theory, through the finite element analysis of the Germany city big bay town LianJiang Bridge before and after reinforcement is obtained about the state of ultimate bearing capacity and serviceability limit state of bearing performance of Bridges as a result, the be mixed of prestressed reinforcement theory of active bridge bearing capacity increase to a certain extent, the ability to reduce the deflection of bridge reinforcement and crack width.