Jan '24
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The IUP Journal of Structural Engineering
ISSN: 0974-6528
A 'peer reviewed' journal distributed by EBSCO and Proquest Database
Structural engineering is usually considered as a specialty discipline within civil engineering, but can also be studied in its own right. It is the science and art of designing and making buildings, bridges, frameworks and other similar structures. It has taken a completely different path since the middle of the 20th century. It involves understanding the load-resisting properties of components such as beams, columns, walls, slabs, plates, arches, shells, catenaries, etc., and selecting, proportioning, and connecting different components of a structure to resist the forces and displacements without affecting the safety of the structure. Structural Engineers are responsible for using funds, structural elements and materials creatively and efficiently. In recognition of the growing importance of this branch of engineering, IUP has come up with a quarterly journal, The IUP Journal of Structural Engineering.
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Finite Element Analysis of Reinforced Concrete Deep Beams Strengthened with Different Shapes of Reinforcement and CFRP Sheets
Shear failure is a crucial criterion in reinforced concrete (RC) deep beams. The paper studies the behavior of five deep beams reinforced with varied shapes of reinforcement and CFRP sheets. Two samples were analyzed using the conventional type shear reinforcement; the third sample had truss-shaped shear reinforcement, combos of strut and tie; the fourth had a Rolled I section to better understand how deep beams behave compositely; and the fifth was conventional type beam wrapped with 1.8 mm thickness CFRP sheet, tested for shear. Several variables were investigated using Abaqus software, including S-Tresca stress, percentage of shear reinforcement, load versus deflection, shear stress and equivalent plastic strain.
Flexural Behavior of Castellated Beams: An Experimental Study
From a structural aspect, the behavior of a castellated beam is not as reliable as that of a solid beam. Hence, the focus should be on improving the behavior of castellated beams. An attempt has been made in this study to experimentally use external prestressing to enhance the behavior of castellated beams. Four beams are fabricated and tested. It is found that the use of pesters over a castellated beam significantly enhances its behavior in all aspects.
Development and Characterization of Air and Nitrile Rubber-Based Prototype Passive Damping Devices
Passive damping devices are a workable technology for structural response control of a variety of structures to seismic excitations. The paper develops a low-cost passive damping device using air and/or nitrile rubber flecks (NRF), a waste material from industries available locally. A prototype damping device comprising cylinder made from PVC pipe housing a piston with a rod with covered ends is fabricated. Entrapped air-cum-friction damper (EAFD) device has air entrapped in the cylinder subjected to sustained triangular, and ATC-24 displacement loading protocol offers force due to air compression and dissipates energy due to air viscosity and side wall friction. EAFD damper is further modified to include NRF of irregular shape on each side of the piston (EAFD-NRF), which might improve the energy dissipation capabilities of the device due to the porous form of the nitrile rubber. Both damping devices (EAFD and EAFD-NRF) are characterized under cyclic loading of different loading rates. It has been found that both passive damping devices show hysteresis behavior under cyclic displacement loading test performed pseudostatically. While the EAFD device sees energy dissipation by friction mechanism dominant over air viscosity, the EAFD-NRF device observes inelastic deformation of NRF leading to relatively lower energy dissipation vis-a-vis EAFD device due to the absence of a redispersion mechanism of NRF in the device. EAFD damper yields an average equivalent viscous damping ratio of 0.43, which is on a par with other metal-based passive damping devices.
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