Comparative Analysis of Grillage Theory and Single Beam Modeling for Continuous Wide Box Girder 

Zhonghua Chen, Qiang Zhang

Department of Civil Engineering, Chongqing JiaotongUniversity, Chongqing, 400074, China

Abstract: Based on the grillage theory, this paper use Midas Civil to complete a comparative analysis of con-tinuous beam bridge by adopting two kinds of modeling method which are single beam model and grillage model. The conclusion is that the continuous girder bridge wide using grillage model, the calculation result is more accurate. However, as for the narrow bridge, The results between two method were no difference.

Keywords: Grillage method; Continuousbeam; Single beam model; Width span ratio