Mechanical Property Analyses of Two Types of Steel–Concrete Composite Track Beams

Abstract

Two types of steel–concrete composite track beams with a girder width of 1250 mm are proposed for new straddle-type monorail system in this paper. One is the steel–concrete composite track beam with a flat steel web and the other is the steel–concrete composite track beam with a corrugated steel web. The mechanical properties of the proposed track beams were numerical analyzed via validated simulated method. There were five parameters, including strength grade of concrete, strength grade of steel, steel box girder upper flange thickness, steel box girder web thickness,and steel box girder bottom flange thickness considered in the analyses. The results shown that the bending capacity of the corrugated steel web steel-composite track beams was found to be greatly affected by the concrete with a strength greater than C50, and the thickness of the bottom plate of the steel box girder was an important parameter affecting the ultimate bearing capacity of the steel-composite track beams.