Comparative Structural Analysis of Dia-Grid in Comparison with Other Conventional Structures

The objective of this study is to evaluate the seismic performance of various structural systems and identify the most efficient configuration for tall buildings. Ensuring adequate lateral stability and ductility is critical for reducing damage during strong earthquakes, particularly in high-rise structures located in severe seismic zones. In this work, seven structural models of a G+20 storey building with a plan dimension of 27.5 m × 27.5 m and a storey height of 3.6 m are analyzed. The models include a conventional moment-resisting frame, shear wall system, core wall system, frame with diagonal bracing, diagrid with periphery columns, diagrid without periphery columns, and a combined diagrid–shear wall system. Using ETABS 2015, seismic analysis is performed for Zone V conditions through equivalent static analysis, response spectrum analysis, and time-history analysis. The seismic performance is assessed using key parameters such as bending moments, shear forces, axial forces, storey displacement, drift, stiffness, and overall economy. The comparative results provide insights into the lateral load-resisting efficiency of each structural system and help determine the most suitable configuration for high-rise buildings in high seismic regions.