Shear resistance of embedded connection of composite girder with corrugated steel web

Abstract

Embedded shear connection with reinforced concrete dowels between corrugated steel webs and concrete flanges is emerging as an alternate connection type to conventional headed studs, perfobond, channel, angle shear connectors, owing to its inherent advantages, such as ease of installation, economical, efficient and better fatigue resistance. In present study, experimental investigations are carried out to understand the influence of embedment depth, concrete dowel with or without reinforcement, area of dowel bar reinforcements on shear resistance of composite system with corrugated steel web and concrete flanges using push-out tests. Totally six push-out specimens are cast by varying (i) depth of embedment, (ii) concrete dowel with and without reinforcement and (iii) area of dowel reinforcement. From the experimental investigations, it is observed that the increase in depth of embedment of web increases the load carrying capacity whereas increase in area of the dowel bar reinforcement increases load as well as slip. It is also observed that the embedded shear connection with concrete dowels showed enormous slip before failure and hence could be classified as ductile shear connector according to EN-1994-1-1. The experimental results are used to establish the influence of different parameters on shear resistance and also used to identify different means that contribute to the shear resistance of embedded shear connection. Further, multiple linear regression analysis is carried out on the data of present study and results reported in the literature to arrive at an expression for most reliable estimate of shear resistance of embedded shear connection for composite girder with corrugated steel web.