الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
 |  | from | 163 |  |  |
| | | from | 163 | | |
Abstract
Engineered Cementitious Composite (ECC) improved the strength, damage tolerance,
ductility, energy dissipation capacity, and durability of components when compared to conventional reinforced concrete. A polyvinyl alcohol fiber reinforced engineered cementitious
composite (PVA-ECC) using local ingredients was developed, aiming for a reduced cost and a
tensile strain capacity matching that of steel reinforcement for commonly used reinforced
concrete structures.The main objectives of this research are to develop and validate a procedure for numerical
modeling and structural analysis of PVA-ECC beams using local (normal) sand. After that,study the effects of different parameters such as shear span-to-depth ratio, shear reinforcement
ratio, longitudinal reinforcement ratio and yield strength of reinforcement on the flexural and shear behaviors of PVA-ECC beams. The results of numerical study indicated that, PVA-ECC beams have excellent shear capacity that helps in decreasing shear reinforcement congestion in structural elements.
Consequently, PVA-ECC with local sand is very useful for structural elements to resist seismic
loads. Furthermore, the peak load is increased with increasing of longitudinal reinforcement
ratio () and its yield strength. On the other hand, the peak load is decreased with increase of shear span-to-depth ratio (S/d) and the mid-span deflection at peak load is increased with the
increasing of S/d in all cases. The stiffness of PVA-ECC is decreased with increasing of S/d and is slightly increased with increasing of the reinforcement ratio (). Also, there are minor differences in stiffness when yield strength of steel reinforcement is changed. There is a continuous need for design engineers to find innovative methods to incorporate these new materials into structural applications, therefore design equations are developed for moment and shear capacities of this low cost PVA-ECC material.