The Influence of Replacing Sand with Waste Glass Particle on the Physical and Mechanical Parameters of Concrete

Glass is a special type of materials which is widely used in various forms and colors for different usages. Colored bottles comprise a large part of waste glass. To reduce the destructive effects of waste glass on the environment, it might be recycled. However, some indecomposable waste materials are buried. This will have harmful effects on the environment. A practical solution for reducing non-recyclable waste colored glass is using them as replacements for materials in other industries such as concrete industry. The effect of replacing aggregate with waste glass particle on the compressive strength and weight of concrete is investigated in this study. To achieve the goal, totally 27 cubic specimens were created; 6 specimens were made of concrete, while waste glass particle was added to the mix of other specimens. To prevent Alkali Silica Reaction (ASR), Microsilica was added to the mix of specimens containing glass. Generally, Results indicated that replacing aggregate with glass particle more than 30% lead to increment in compressive strength of concrete. The weight of concrete remains almost the same in all of the specimens. Briefly, based on the results it could be concluded that the optimum percentage for replacing aggregate with glass particle is 50%

INVESTIGATION OF DESIGN CODES RELIABILITY FOR SEISMIC DESIGN OF STEEL PLATE SHEAR WALLS CONSISTING OF SEVERAL PARAMETERS

Steel plate shear walls have been used as lateral resistant systems at several buildings particularly at high rise building during past three decades. This system contains appropriate rigidity to control displacements and also have ductile failure and high energy dissipation mechanism, so it can be used for new buildings or strengthening existing structures at seismic prone areas. Generally steel plate shear walls are consisting of steel plate walls and two boundary columns and horizontal floor beams. In this paper, initially a steel plate shear wall of a 5-floor building at high seismic area was designed according to AISC 341-05, then ABAQUS finite element program was used to investigate the seismic behavior of structure and get hysteresis curves under cyclic loading and also investigate the several parameter effects on local instability and non-linearity of material at designed typical shear wall and also the other new walls with different opens and rigidities. Numerical analysis results indicate that rigidity, shear capacity, and energy dissipation of wall were increased whenever column dimensions and length to height ratio was increased. Moreover, the main failure mode as global buckling was happened at the base of the column with increasing of the number of floors, so indicating the decreasing capacity and rigidity. And also the results showed that more open dimensions caused the higher ductility, decreasing capacity and rigidity and dissipation. The higher capacity, rigidity, energy dissipation, and ductility were observed at shear wall consisting of the more stiff nesses