Abstract :

Earthquakes Are Among The Most Destructive Natural Hazards Affecting The Safety And Stability Of Multi-storey Reinforced Concrete (RC) Buildings. Modern Architectural Requirements Often Necessitate The Use Of Floating And Inclined Columns To Provide Column-free Spaces And Improve The Aesthetic Appearance Of Buildings. However, These Structural Configurations Introduce Vertical Irregularities That Significantly Influence The Seismic Behaviour Of The Structure. Hence, It Is Essential To Evaluate Their Performance Under Earthquake Loading To Ensure Structural Safety And Serviceability. The Present Study Investigates The Comparative Seismic Performance Of Multi-storey RC Buildings Incorporating Floating Columns, Inclined Columns, And Core Wall Systems Using ETABS . A Total Of 36 Analytical Models Comprising G+10, G+15, And G+20 Buildings Were Analysed In Seismic Zones II, III, And IV . Four Structural Configurations, Namely Basic Model (BM), Four-Column Core (FCC), Nine-Column Core (NCC), And Core Wall (CW), Were Evaluated Using The Response Spectrum Method. The Seismic Response Of Each Model Was Assessed Based On Base Shear, Roof Displacement, Storey Drift, Storey Stiffness, Overturning Moment, And Fundamental Time Period. The Analytical Results Indicate That Seismic Response Becomes More Severe With Increasing Building Height And Seismic Zone. Buildings With Floating Columns Exhibited Higher Roof Displacement, Storey Drift, And Overturning Moments Due To Discontinuity In The Load Transfer Mechanism. Inclined Column Configurations Demonstrated Improved Lateral Stiffness And Reduced Displacement Compared With Floating Column Models. Among All The Structural Systems Analysed, The Core Wall (CW) Models Consistently Exhibited The Best Seismic Performance By Providing Minimum Roof Displacement And Storey Drift, Maximum Storey Stiffness, And Superior Overall Structural Stability. The Study Concludes That Floating Column Configurations Should Be Used With Caution In Moderate And High Seismic Zones Unless Supported By Efficient Lateral Load-resisting Systems, While Core Wall Systems Provide The Most Effective Solution For Enhancing The Seismic Performance Of Multi-storey RC Buildings

Published:

19-8-2026

Issue:

Vol. 26 No. 8 (2026)

Page Nos:

992 - 1007

Section:

Articles

License:

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

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