S. Swaminathan ¹, A. Siva ², R. Senthil ², Kinson Prabu ³

Affiliations
1 Department of Civil Engineering, Affiliated to Anna University, Chennai - 600025, Tamil Nadu, IN
2 Division of Structural Engineering, Department of Civil Engineering, College of Engineering Guindy, Anna University, Chennai - 600025, Tamil Nadu, IN
3 Department of Civil Engineering, Purdue University, West Lafayette, IN 47907, US

Abstract

Background/Objectives: The steel-concrete composite construction has become an effective construction practice in the recent years. The cold form profiled sheet acts a platform for during the construction phase and acts as an external reinforcement after the construction. In steel-concrete composite construction, the shear connectors transfer the longitudinal shear force across the steel flange/concrete interface. The ability to transfer longitudinal shear force by shear connectors mainly depends on the strength of concrete against longitudinal cracking and mechanical properties of the shear connectors. This research investigates shear connector's capacity; the experimental investigation is involved using push-out test for two sets with different shear connectors framing to the profile steel sheet. Methods/Statistical Analysis: Set-W consists of three composite slab specimens with welded stud shear connectors, while set-B consists of three composite slab specimens with bolted shear connectors. Trapezoidal profile steel sheet of thickness 1 mm with rectangular embossments is used. Several key parameters of the composite slab are examined and measured, including slippage capacity, load carrying capacity, composite slab ductility and failure mechanism. Findings: the welded shear connectors provided a better performance in resisting slippage and providing a welded set higher load carrying capacity, however, the bolted shear connector specimens set showed more ductile behavior as compared to of specimens.

Keywords

Bolted Shear Connectors, Composite Slab, Slippage Capacity, Welded Shear Connectors.

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P. Sundaram ¹, R. Senthil ¹

Affiliations
1 Department of Mechanical Engineering, SRM University, Kattankulathur, Chennai - 603203, Tamil Nadu, IN

Abstract

Objectives: The effect of selective coatings on the solar absorber of a Parabolic Dish Collector (PDC) is presented in this work. Methods/Statistical Analysis: Outdoor experiments performed on sunny days at a 16 square meter. PDC with selective absorber of 0.4 m diameter. The Mild Steel (MS) absorber plates coated with nickel and chromium for their low emissivity and high absorptivity using the electroplating process with thicknesses of 30 μm. Findings: Instantaneous efficiency, radiative and convective heat losses evaluated for the absorber. The efficiency of collector system is highest when the mild steel absorber plate coated with nickel. Application/Improvements: The solar selective coatings are more beneficial in the energy transfer and economical to the consumers. The consistent higher absorption rate at the outdoor climate has to attain with a long life coating.

Keywords

Parabolic Dish Collector, Selective Coating, Solar Absorber,Solar Concentrator.

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