Effect of the Boundary Elements on the Seismic Performance of Permanent Shuttering Concrete Panel Structures

Study of the effect of confinement of concrete on the seismic performance and behavior of permanent shuttering concrete panel structures is the subject of this paper. For this purpose، a few building models with different heights، but similar planar layout of walls، with and without considering the effect of confinement، i. e. execution of boundary elements، are taken into consideration. For this study، the PERFORM 3D software is employed for the modeling of nonlinear behavior of these structures by the possibility of using a multi layer shell element with fiber sections. For finite element modeling of these sections two types of concrete fibers، confined and non-confined، are employed. After modeling and carrying out nonlinear analyses، performance of each of specimens at two different risk levels is determined. The obtained results indicate that although execution of the boundary elements in these structural systems does not considerably improve the seismic performance but the confinement is a major factor in improving some parameters such as ductility، the probable maximum strength and the loss of energy that have a positive influence on the seismic performance of the structure.