Finite Element Analysis Of Ultimate Bearing Capacity Of RC Beam In Bridge With ANSYS

With the development of highway bridge of our country, heavy traffic aggravated day by day reduced the traffic capacity of the existing bridge, reduced load carrying capacity and did a lot of damage to the structural component. How to evaluate bridge structural performance is already aroused more and more attention of domestic and international scholars.Combines several questions of the bridge test at present, according to the existing research results, evaluate the method of simulation calculate to estimate the ultimate bearing capacity of structure of the bridge.Based on finite element theory of reinforce concrete, using the finite element analysis software ANSYS, establish finite element model of RC beam with self-defining stress-strain relation, through non-linear static analysis and modal analysis get loads-displacement curve and loads-frequency curve of every model beam, and use the result get the load value of ultimate bearing capacity. Contrasts static analysis and modal analysis result, the value is accordant. Modal analysis replaced static analysis to evaluate the ultimate bearing capacity of structure of the bridge is feasible.In order to prove analysis result of the ultimate bearing capacity of structure of the bridge with ANSYS, have carried on the damaged tested of RC beam. Through static and modal damaged tested get loads-displacement curve and loads-frequency curve of every beam, and the result has the same regular with ANSYS calculation result. With the contrast of test result and ANSYS calculation result, ANSYS calculation result is right, and using the finite element analysis software ANSYS through simulation calculate to estimate the ultimate bearing capacity of structure of the bridge is feasible.