Slabs are known as the major parts of construction of reinforced concrete structures for retaining and transferring gravity loads to the columns. Accordingly, numerous practical and theoretical experiments were conducted in order to know the behavior and the capacity of loaded Slabs. Concrete is one of the most used materials in the construction industry in the world. In recent decades, efforts have been made to increase the compressive strength of concrete for the optimal use of materials, which has been accompanied by significant improvements. However, weakness of concrete in tension, low ductility and brittle failures has been considered as the shortcomings of this material. To overcome these defects, over the past few decades, a number of studies have been carried out on High Performance Fiber Reinforced Cementitious Composites (HPFRCC). The main components of HPFRCC are generally cement mortar, fine aggregates and fiber. One of the main characteristic of this material is strain-hardening behavior under tensile loading. The experiment’s results show that bearing capacity, ductility, energy absorption, durability and resistance to external aggressive agents, the formation of multiple micro crack increase with HPFRCC material as compared with traditional concrete. The short-spread length fiber control crack opening and propagation cracks, and in most cases, steel fibers, glass, polypropylene, polyethylene, polyolefin, polyvinyl alcohol and carbon fiber are used. There are many old or constructed concrete structures with insufficient strength and low ductility against The gravity and seismic loads. Therefore, in this research, the behavior of slab column connection and a few proposed strengthening patterns of slab column connection has been investigated using HPFRCC or ECC (Engineering Cementitious Composites). In this regard, slab column connection have been numerically modeled and studied using nonlinear finite element method and ABAQUS software. Damaged plasticity behavioral model with the strain-hardening in tension of concrete behavior was used in this study. In this research, the effect of using HPFRCC in slab column connection of cyclic dynamic loading with different percentages of longitudinal and transverse reinforcement, various compressive strength by using capital and without it, and amount of it’s effects on ECC. In conclusion, the net result of all changes like twice increasing of ultimate forcing, twice increasing of ultimate displacement, fourfold rising energy absorption and rising punching shear capacity about 25 percent show that nowadays using (ECC) instead of normal concrete is more general in current structures. Keywords : Reinforced concrete slab-column, High Performance Fiber Reinforced Cementitious Composite(HPFRCC), Engineered Cementitious Composite (ECC), nonlinear finite element method, ABAQUS.
