Moment Capacity Ratio at Beam-Column Joint in Frame Structure

The study confirms that MCR has a clear influence on the ductility, strength and collapse mechanism of reinforced concrete frame structures. For the analyzed frames, an MCR range of approximately 1.4 to 1.5 appears to provide a favorable balance between seismic performance and economy. Increasing MCR beyond the optimum range may increase strength demand or reinforcement requirement without a corresponding improvement in ductility. The performance-point assessment showed hinge formation below the immediate occupancy level, indicating satisfactory seismic behavior for the studied models. Future work may include irregular buildings, exterior and corner joints, shear-wall interaction and a wider set of frame configurations.

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