Investigations on flexural capacity of steel concrete composite deck with diverse bond patterns

Abstract

The steel-concrete composite deck is as an effective flooring option all over the world since last five decades Recently these systems have started gaining popularity in India as well This research focuses on Evaluation of flexural strength of composite deck system analytically based on International standards and parametric variations Investigations on the flexural strength experimentally with different bond patterns and their comparison by strength prediction procedures The evaluation consists of code based studies on European British and American standards for flexural capacity and limiting geometrical and material parameters Subsequently parametric analysis is performed to further investigate effect of material and geometric parameter variations such as steel grade concrete grade profile sheet thickness and concrete depth on flexural capacity and neutral axes The study proposes guidelines for flexural capacity of composite deck as per Indian scenario It also suggests neutral axis factor to ensure under reinforced section theoretically The guidelines will be useful for users in India in absence of Indian code of practice for a composite deck The investigation comprises of experimental work on three wavelengths and one wavelength composite deck specimen with different bond patterns Five analytical strength prediction methods from no bond to full bond are compared with experimental flexural capacity The research demonstrates that one wavelength test specimen with ductile failure show good agreement with three wavelengths tests Among investigated bond patterns, specimens with bolts head at interface have significantly improved composite interaction One wavelength test specimen is proposed to verify the composite action experimentally The specimen represents the bending behaviour and minimize the cost of experiments Incorporating the bond properties analytical strength prediction models are prescribed to verify the test results newline newline