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In order to optimize the design of the girder bridge, based on the CSWs PC box girders bridge design parameter, the mechanical behavior of single-room girder boxes from the single cell to five cells under four different load combinations were analyzed by using the FEA. The mid-span displacement in the bottom flange, Von-mises shear stress in both corrugated web sides, normal warping stress and dead weight of the box girder were obtained. Calculation results have shown that multiplying cell numbers could increase the efficiency of prestressing and decrease the Von-mises shear stress in both corrugated web sides in some cases. However, with the cell numbers increasing, the normal warping stress under eccentric load and the dead weight of the girder increase dramatically. Finally, by utilizing the Simple Formula Method and Principal Component Analysis Method, the proper cell number for the box girder of the specified size is suggested.

Mechanical behavior evaluation of corrugated steel webs (CSWs) multi-cell PC box girders