EVALUATION OF THE CAPACITY SPECTRUM FOR STEEL STRUCTURE WITH STEEL SHEAR WALL WITH NONLINEAR STATIC ANALYSIS (PUSHOVER) AND ENERGY METHOD WITH NO CONTROL

In drawing the structure displacement capacity spectrum of a degree of freedom equivalent in increasing nonlinear static analyses to evaluate the structure performance, a point of a structure should be considered as a control point where it is usually considered as center of mass in building frames. In this article, displacement capacity spectrum has been calculated via two methods based on the energy without the need to determine control points, for 12 steel frames of 7, 15 and 30 classes in two dimension in two modes of 5 and 7 spans with joint and clamped connections under the eect of major mode and higher modes. They have been compared with displacement capacity spectrum of dierent classes. Evaluation of the results shows that the two methods based on the energy indicate the fact that the displacement capacity spectra are close to each other. and comparing them with displacement capacity spectrum with respect to roof point as control point shows that displacement capacity spectrum of roof point in the rst mode on the displacement capacity spectrum obtained from the two methods of energy is consistent.