Flexure and shear load rating evaluation of composite bridge superstructure under effect of different trucks load types

Abstract

The purposes of this study were to provide a methodology for comparing between structural members of composite bridge due to flexure and shear load rating. Also it was used to evaluate and determine the load capacity of composite bridge structural members by adopting load rating analysis method through using different types of international trucks. CSI bridge Ver. 20 was used in the analysis process. The results of flexure and shear, load rating shown that the left and right girders carried the higher values of flexure and shear load rating for all types of trucks load. The structural member of bridge which was subjected to higher values of flexure and shear load rating had sufficient live load carrying capacity, more elasticity and stiffness, indicating that the values of static structural parameters such as bending moment, vertical shear force, vertical displacement and axial force were lower than structural member had minimum values of flexure load rating. The results of factored bending moment, vertical shear force, and axial force shown that truck type LM3-3600/240 had the higher values of factored bending moment, vertical shear force, and axial force within exterior girders which were appeared minimum flexure load rating. The minor values of factored bending moment, vertical shear force, and axial force were happened under effect of truck type AML and Hsn-44L because of these trucks had higher flexure and shear load rating. The maximum value of vertical displacement was 29 mm under truck type LM3-3600/240 which had lower flexure load rating.