Experimental Study of Shear Failure of Damaged RC Beam Strengthened with GFRP
Antecedents of Variations in Construction Contracts - A Statistical Correlational Study
Dynamic Response of Footbridge Decks
Urban Green Spaces and their Role in Enhancing Quality of Life
Parametric Study on Structural Behaviour of RCC Box Culvert
Study on Strength Properties of Lightweight Expanded Clay Aggregate Concrete
A Step By Step Illustrative Procedure to Perform Isogeometric Analysis and Find the Nodal Displacements for a Two Dimensional Plate Structure
Lateral - Torsional Buckling of Various Steel Trusses
Comparative Study on Methodology of Neo-Deterministic Seismic Hazard Analysis Over DSHA and PSHA
A Step by Step Procedure to Perform Isogeometric Analysis of Beam and Bar Problems in Civil Engineering Including Sizing Optimisation of a Beam
Investigation on the Properties of Non Conventional Bricks
Analysis on Strength and Fly Ash Effect of Roller Compacted Concrete Pavement using M-Sand
Investigation on Pozzolanic Effect of Mineral Admixtures in Roller Compacted Concrete Pavement
Effect of Symmetrical Floor Plan Shapes with Re-Entrant Corners on Seismic Behavior of RC Buildings
Effect of Relative Stiffness of Beam and Column on the Shear Lag Phenomenon in Tubular Buildings
Concrete is one of the most widely used materials for various construction projects around the world due to its low cost, availability, durability and ability to withstand extreme weather conditions. Glass and plastic have become part of our daily lives, with continuously increasing annual consumption. Low density, high strength, durability, light weight and low cost are factors that have contributed to the increase in the consumption of glass and plastics. Generation of waste from glass and plastic products are increasing and disposal of the waste causes environmental issues. There are many researches that utilize these generated waste as construction material. This research focuses on the use of shredded plastic waste and green glass waste powder to replace coarse aggregate and cement in concrete. The grade chosen for the investigation was M20. The mechanical properties of glass powder based concrete were studied by replacing green glass powder at 5%, 10%, 15%, and 20% with the volume of cement and replacing 10% coarse aggregate by volume with waste shredded plastic bottle caps. The test specimens chosen for the research were cubes of dimension 150 mm x 150 mm x 150 mm, cylinders of dimension 100 mm x 200 mm, and beams of dimension 100 mm x 100 mm x 500 mm. Results indicate that workability of freshly prepared concrete using glass powder noticed shear collapse for all the mixes cast. The compressive strength was 10% higher than the conventional concrete whereas split and flexural strength were almost same as that of conventional concrete. Hence, an attempt can be made to use waste green glass and plastic in the preparation of routine concrete.
Fluid viscous dampers are dynamic actuators that when stroke, it absorb the energy that by tectonic disturbances, wind absorption, or heat on a structure. Every multi-story building structure that is subjected to ground motion in daily life needs to be studied to determine how it responds because this is a common issue for construction. The structure's foundation is vibrating due to the earthquake. Buildings oscillate as a result of these vibrations, which could seriously harm the structure and observe the earthquake behaviour of structures with and without Fluid Viscous Dampers (FVD) and conventional Reinforce Concrete (RC) moment-resistant frames. The analysis takes place on displacement changes that caused by the addition of FVD in the structure and reduction in base shear in reinforced concrete structures after installing FVD and by using response spectrum and time history analysis. It compares the findings of storey displacement, storey stiffness, base shear, and storey drift assessments. This research provides information on several studies done on multi-story buildings while taking into account the various factors. The examination on vibration characteristics of a G+20 structure with and without a viscous damper is presented in the proposed work. Practically all multi-storeyed buildings must be analysed as three-dimensional systems, according to the current edition of the IS: 1893–2016. The building floor plans may be seen as asymmetrical and the hill slope topography of India is typically geologically stable.
Deep beams are common elements in concrete structures such as bridges, water tanks, etc. Deep beams were designed by using the strut-and-tie model (STM) method without any web reinforcement using ACI 318-14 with a shear span to depth ratio (a/d =1). RC deep beams show brittle failure by crushing of struts under applied load. Fiber reinforced concrete (FRC) is a better alternative for the reinforced concrete beam without web reinforcement as it contains fibers such as a ramid, steel, etc. The fibers used were steel fibers of 1% volume, and aspect ratio of 60. The use of carbon fiberreinforced polymer (CFRP) for strengthening the deep beams is utilized and a comparison between reinforced concrete(RC) and fiber-reinforced concrete (FRC) deep beams with and without CFRP strengthening is carried out using (Analysis of Systems) ANSYS 18.1. The mid-span deflections were significantly decreased and improved shear strength was observed in CFRP strengthened deep beams and FRC deep beam in comparison of RC deep beam. The ultimate loads for a maximum deflection value were compared in all the deep beams and RC frame with embedded carbonfiber reinforced polymer (RC-CFRP), fiber reinforced concrete carbon-fiber reinforced polymer(FRC-CFRP) and FRC deep beams showed 29.4%, 42.47% and 32.05% improvement, respectively, when compared with the RC deep beam. A total of 43.4% decrease in deflection and 74% decrease in shear stress was observed in FRC deep beam. The deflection and stress values in strengthened beams were comparatively lesser. In this study, deflection was observed to decrease by 74.4% and 82%, and shear stress decreased by 92% and 93.5% in the strengthened RC and FRC deep beam, respectively, compared to the deep beam RC model. It is suggested that strengthened FRC is a better alternative to RC deep beams.
Earth is currently dealing with a pandemic. In a view to solve both the problems at once, replacing the major ingredient of concrete, that is, coarse aggregate, by waste plastic seems a promising prospect. Also, quarrying, the process by which stones are extracted from the earth, has devastating impacts on the local ecosystem, ground water, and even has air-polluting effects, so finding a replacement for coarse aggregate would be a boon to the construction industry as a whole. In this work, coarse aggregates were replaced with pre-treated plastic and behaviour with respect to strength was observed, and it was found that replacements up to 15% are viable and can result in strengths comparable to those of normal M20 concrete, showing a promising replacement to coarse aggregate without having adverse effects on the strength of concrete.
Concrete is widely used as a construction material in the world and consequently cement manufacturing industry ranks second in CO2 emission. To mitigate this environmental issue, this research focuses on reducing the self-weight of a concrete slab applying modern techniques to cut down the usage of cement, cutting carbon emissions from the cement manufacturing industries. The main goal of the study is to reduce the self-weight of concrete slabs and to eliminate steel reinforcement in concrete, and to use this stress profile to determine the isostatic path in concrete slabs. This would be achieved with high-strength concrete in the maximum bending stress path and replaces foam or other material in the minimum bending stress zone. In this work, the specimen considered for design and analysis is a slab having the dimension of 3 m x 3 m x 0.125 m. It slab uses 1% of steel fibers in concrete eliminating the need for reinforcement. Also, with the use of high-strength concrete in the maximum bending stress zone, the self-weight of the slab reduces up to 44%. The deformation of the slabs are well within the limits recommended by the codes released by Bureau of Indian Standards (BIS).
