Performance-Based Structural Analysis and Design of a G+4 Residential Reinforced Concrete Building Under Gravity and Lateral Loads

Rapid urbanization and population growth have increased the demand for multi-storeyed residential buildings, especially in urban and semi-urban regions where land availability is limited. The present project deals with the analysis and design of a G+4 residential building using both manual calculations and STAAD.Pro V8i software. The building is a reinforced cement concrete (RCC) framed structure consisting of four residential floors above ground level, designed as per the provisions of IS 456:2000, IS 875 (Part 1 & 2), and other relevant Indian Standard Codes. The planning and drafting of the building were carried out using AutoCAD, ensuring compliance with National Building Code (NBC-2016) requirements related to setbacks, ventilation, room dimensions, and safety provisions. The structural elements such as slabs, beams, columns, and isolated footings were designed using the Limit State Method. Loads considered in the analysis include dead loads, live loads, and floor loads as per codal specifications. The modeling of the structure was performed in STAAD.Pro by defining geometry, assigning material properties (M30 concrete and Fe500 steel), applying support conditions, and generating load combinations. The analysis results such as bending moments, shear forces, axial loads, and deflections were obtained through the post-processing mode. These results were compared with manual design calculations to evaluate accuracy and efficiency. The comparison shows that the analysis results from STAAD.Pro and manual calculations are nearly similar, with slight variations in reinforcement detailing. The use of software significantly reduces computation time and minimizes human errors while ensuring safe and economical design. The project concludes that STAAD.Pro provides reliable and efficient structural analysis and design results for multi-storeyed residential buildings.