Thin-Walled Steel I-Girders Subjected To Eccentric Patch Loading

Because of the highly concentrated loading and eccentric loading, it is difficult to predict the failure mode and the ultimate bearing capacity when the thin-walled steel I-girders are subjected to eccentric patch loading. Based on the latest experimental study abroad, the ultimate bearing capacity of the thin-walled steel I-girders subjected to eccentric patch loading has been analyzed in this text.According to the latest test results abroad, the software ANSYS8.0 is applied to carry out the finite element nonlinear analysis. The most numerical calculating results agree well with the test data. The parameters affecting the ultimate bearing capacity of the thin-walled steel I-girders subjected to eccentric patch loading are researched through a series of numerical test specimens. The parameters, which have played an important role in the ultimate bearing capacity, are the web thickness, the yielding strength, the eccentric value of the loading and the applied length of the loading. Based on the semi-experienced predicting equation of the ultimate bearing capacity of the thin-walled steel I-girders under the centric patch loading and the results of the numerical tests, a new predicting expression is proposed to determine the ultimate bearing capacity of the thin-walled steel I-girders subjected to eccentric patch loading in this text. But this new predicting expression is only applied to the situation when the eccentric value of the loading is between Omm and 15mm. The comparison of the calculating results abstained from the new predicting expression with the test results and the numerical calculating results shows that the new proposed expression is reasonable and conservative.