Research On Finite Element Simulation Method Of Anisotropic Curved Beam Ridge Anisotropice

With the finite element method and the interface is ceaseless and perfect, the civil engineering field of CAD (computer aided design program) of dependency is increasing, and the model of the lack of unified guidance, often based on the engineers themselves on the finite element and the norms of approximate simulation model, therefore the subjectivity is stronger, the actual structure simulation degree of approximation also join Cibuqi, coupled with the curved beam bridge design lacks the corresponding guiding standard, thus caused the author of the bridge design concerns. Currently for curved beam bridge design mainly through the finite element software, according to the beam Gefa theory modeling, by considering the load lateral distribution of curved beam bridge, to simulate the stress performance of the web. Beam Gefa model with single beam is more complex, boundary conditions and section characteristics simulation accuracy will directly affect the beam Gefa calculation results, and the industry is not a unified beam Gefa analog standard, at the same time as the beam Gefa on shear lag, cross section distortion effects cannot be fully considered, so how to correctly use the beam Gefa, accurate the establishment of model and get the accurate calculation results, is designed to focus on a problem. The author will be solid unit as reference, through comparing the different parameters of the bridge bridge stress influence, put forward the correct beam Gefa modeling method, designers can directly refer to the rule to test the accuracy of the model, in addition, for all of the radius of the curved girder bridge using beam Gefa modeling is necessary, is also this paper studies content.This paper first introduces the current research progress of curved bridge, provides an overview of the curved bridge on the corresponding design theory and calculation basis, elaborated the single beam and beam grid model in the structural analysis of the deficiencies and shortcomings, designers are suggested based on the results of two calculation methods.Then, summed up based on various theoretical basis for curved bridge research method and curved bridge stress exhibited significantly different from the straight bridge features:bending and torsional coupling beam body, and uniform stress, shear lag and distortion of the beam body effect, in the design should be fully aware of these factors on the torsional stability the effect of.Finally, this paper uses Midas FEA, Civil analysis of curved beam bridge force, stress, respectively using the single beam, beam grid unit, solid element model to simulate the different radius of the curved bridge, through the comparison of different simulation of curved bridge under the action of load supporting force and stress and, introduced in detail based on finite element simulation of curved bridge accurate method, and summarized on the basis of the curved bridge force and the control sections of the stress and parameters of bridge, for the designer to bridge the accuracy of the model reference.