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Past researches showed that the energy dissipation capacity of the wide beam-column joints was not sufficient. So, two full-scale reinforced concrete interior wide beam-column joints were tested under quasi-static cyclic loads and the performance of the specimens was studied experimentally and numerically. Effect of using wide beams in two directions was investigated and it became clear that the longitudinal reinforcement of transverse wide beam had significant effect on the seismic behavior of the joints. Flexural hinging mechanism in the wide beams occurred instead of torsion brittle mode of failure. Effect of eccentric beams on joints is one of the areas needing research in ACI 352R-02. In the numerical study, it was seen that damage of the joints was concentrated to one side of the joints that the beams shifted to. Besides, concrete grade did not have much effect on behavior of the joint.

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Prediction of performance level of the reinforced concrete Shear wall-Frame structural systems are not only dependent on the method of nonlinear analysis, but are also related to some effective parameters used in each method. This article studies the effect of some important parameters such as plastic rotational capacity of the structural elements, capacity spectrum, drift and the overall damage of the building, from two viewpoints, one of which is the performance level of structural elements and also the performance level of the overall structure neglecting the nonstructural elements. In order to achieve the expected results, 92 nonlinear analyses including 64 nonlinear static analyses and 28 nonlinear dynamic analyses have been carried out on three dimensional buildings comprising 8, 12, 16 and 20 stories. These buildings were analyzed and designed according Syrian concrete code of practice (2004). All of the nonlinear analyses were carried out on the bases of the above mentioned parameters as a main criteria utilizing IDARC-ver6 program. The obtained results show that the performance evaluation based on overall displacement of the whole structure and the failure of an element, is a restriction of capacity curve which has provoked some doubts.

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