Department of Civil Engineering

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    Investigation on circular and octagonal concrete-filled double skinned steel tubular short columns under axial compression
    (Techno-Press, 2022-07) Kumar, Manoj
    This paper describes the experimental and numerical investigation on circular and octagonal CFDST short columns under concentric loading to study their responses to various internal circular steel tube sizes by the constant cross-sectional dimensions of the external circular and octagonal steel tube. The non-linear finite element analysis of circular and octagonal CFDST columns was executed using the ABAQUS to forecast and compare the axial behavior influenced by the various sizes of internal circular steel tubes. The study shows that the axial compressive strength and ductility of circular and octagonal CFDST columns were significantly influenced by inner steel tubes with the strengths of constituent materials.
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    Performance of FRP Bridge Deck Under Flexural Loading
    (Springer, 2022-07) Singh, Shamsher Bahadur
    Fibre-reinforced polymers or FRPs are durable materials that are highly resistant to corrosive activity, have a high stiffness-to-weight ratio and are ideally suited for the construction of assembly lines into compact modules which can be easily installed. FRP production costs are therefore considerably higher than conventional concrete and steel materials. Hence overall cost savings is either due to decreased weight, faster building speed or lower maintenance and improved life span. In this study, the optimum cross-section of the stiffeners of the deck slab is determined from different shapes and sizes of stiffener, which offers high stiffness and strength. Along with, effect of different longitudinal and transverse modulus of stiffeners on the flexural capacity of deck is determined. It is observed that by keeping longitudinal modulus (E1) constant while varying the E1/E2 ratio, the trapezoidal shape stiffener provides the highest strength and stiffness. On the other hand, keeping E2 constant and varying the E1/G12 ratio trapezoidal stiffener shape shows the best result.