34www.ijeas.org  Abstract-In this study, the seismic behaviour of the concrete shear wall considering the opening with different shapes and constant cross-section has been studied, and for this purpose, several shear walls are placed under the increasingly non-linear static analysis (Pushover). These case studies modelled in 3D Abaqus Software, and the results of the ductility coefficient, hardness, energy absorption, added resistance, the final shape, and the final resistance are compared to shear walls without opening.

Composite columns are one of the most used cross-sections in various buildings and bridges. In this research, the impact of different parameters such as the effect of the eccentricity of loads or the change in the horizontal distance of the loading profiles in buckling of the composite columns with double IPE cross-sections as well as the impact of different value of slenderness on buckling of composite box columns has been investigated. Based on the results, the steel member's yielding will be delayed by filling the steel sections with concrete. Also, an increase in the amount of composite column capacity is directly related to the associative ratio of composite concrete. In other words, increasing the ratio of the concrete surface leads to greater capacity which is caused by being filled with concrete.

In this study, the seismic behavior of the concrete shear wall considering the opening with different shapes and constant cross-section has been studied, and for this purpose, several shear walls are placed under the increasingly non-linear static analysis (Pushover). These case studies modeled in 3D Abaqus Software, and the results of the ductility coefficient, hardness, energy absorption, added resistance, the final shape, and the final resistance are compared to shear walls without opening.