Experimental study on shear performance of corrugated steel web composite girder lined with ultra-high performance concrete
In order to study the shear performance of corrugated steel webs combination girder lined with ultra-high performance concrete,seven specimens were designed and produced by considering the thickness of the steel plate,corrugation length and thickness of the inner lining concrete.Through shear tests,the damage form of the specimens was observed,the deflections in and out of the face were obtained,and the influence of each parameter on the specimen load-displacement curves was analysed.The results show that the damage form of the specimen is shear damage.The key shear diagonal cracks appear in the inner lining concrete,and the steel plate occurs to different degrees of the bulge,the two jointly bear the shear force.Increasing the thickness of the steel plate can significantly improve the shear performance of the specimen.The specimen shear capacity increases with the increase in the thickness of the inner lining concrete,but continue to increase the thickness of the inner lining concrete,the rate of increase in the bearing capacity instead of slowing down.When the corrugation length is increased from 1 200 mm to 1 600 mm,the shear capacity increases.When it is increased to 2 000 mm,it leads to a decrease in the capacity.This study provides a theoretical basis for the application of corrugated steel web composite structure with ultra-high-performance concrete in large-span bridges.
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