Mechanical performance analysis of corrugated steel webs(CSWs) PC box girder with different cell numbers
（1. College of Water Resources & Civil Engineering, China Agricultural University, Beijing 100083, China; 2. School of Civil Engineering, Harbin Institute of Technology, Harbin, Heilongjiang 150090, China)
Abstract：To optimize the design of girder bridge, the proper cell number of the twolane CSWs PC box girder was investigated. Based on the twolane CSWs PC box girder bridge design parameter, the mechanical behaviors of singleroom girder box with single cell to five cells were analyzed under four different load conditions by finite element analysis (FEA).The midspan displacement in the bottom flange, the vonMises shear stress in both corrugated web sides, the normal warping stress and the natural frequency of the box girders were obtained. The results show that multiplying cell numbers can increase the prestressing efficiency and decrease the vonMises shear stress in both corrugated web sides in some cases. However, with the cell number increasing, the normal warping stress under eccentric load and the dead weight of the girder are increased dramatically. By simple formula method and principal component analysis method, the proper cell number for the twolane CSWs PC box girder is suggested.
