The Effect Of Automobile Load Study On Structure Of Self-anchored Cable-stayed Suspension Combined System Bridge

The self-anchored cable-stayed susupension system-combined bridge is a new kind cable supported bridge. Supported by project of real bridge, the model test of full load condition and offset load is carried on. At the same time, the calculation model to the model bridge is set up by the general finite element computational software, based on the geometric nonlinear spece finite element models of theory. This paper adopts the medoth that model test combines with numerical simulation to annlyses the components of self-anchored cable-stayed susupension system-combined bridge's force situation under vehicle load function. The mian research contents are as follows:1) this paper considers the four primary geometric nonlinearity factors of the cable sagging effect, the large deflection effect clue to changes in geometry, the influence of initial strains and axial forces'composite effect in rigidty matrix, and put forward the corresponding treatment method in the finite element.2) Based on the gemotric nonlinear spece finite element models of theory, the paper sets up the the finite element calculating model of full load test and offset load test by using the general finite element computational software MIDAS/Civil to simulate four condition of main span full load, full-bridge full load, main span offset load and full-bridge offset load, and carry on structural analysis.3) based on vehicle loading model testing, the paper compares measured results of model test and calculation results to trsearch the mechanical behavior, deformation conditions and satety condition of the bridge strucyure.