Theoretical Analysis of Axial Behavior of Circular Column Confined with Polymer Material
Keywords: Column strengthening, nonlinear finite element, polyurethane-cement composite
AbstractThe collapse of the bridge are due to inadequate seismic performance of bridge pier (or pile) and columns, which provided with poor ductility and energy dissipation. Deep study of strengthening structural element concern elasto –plastic behavior of concrete would be important to increase the capacity of structures elements. Considering the rapid development of economic construction and the Traffic volume through different regions has been escalating, there is a substantial contribution has been developed in traffic construction and structures. This research focus on new strengthening method to provide effective confinement to the concrete core and obtain elastic deformation of the circular columns. The finite element software ABAQUS used for the nonlinear numerical analysis of the concrete column strengthening with polyurethane cement composite mix. Results shows that the use of new technique for strengthening has greatly improved the ultimate capacity of column. The thickness of strengthening material is the main parameters in this study and govern by the behavior of polyurethane-cement material. The improvement ratio in loading capacity with confinement thickness 40 mm and density of confinement material 1600 Kg/m3 is 277% compared with non-strengthening model.