Authors:
Vijayan Selvaraju, S. D. Kumar

Addresses:
Department of Civil Engineering, SRM Institute of Science and Technology, Ramapuram, Chennai, Tamil Nadu, India. Department of Mechanical Engineering, SRM Institute of Science and Technology, Ramapuram, Chennai, Tamil Nadu, India.

Abstract:

The effect of plan irregularity on buildings of varying heights and the mitigation of additional torsion through the strategic placement of shear walls are explored in this study using Response Spectrum Analysis in STAAD Pro. This research focuses on the performance and behaviour of concrete buildings, especially under seismic loading, by varying the location and orientation of shear walls along the building plan to determine their optimal positions. Several structural models, including regular structures and those with plan irregularities, such as L- and T-shaped buildings of various heights, incorporate shear walls at various locations and orientations along the building plan. Studies were then conducted on their structural behaviour and analyzed to yield valuable insights into the effects of plan irregularity and the effective use of shear walls. Results demonstrated that placing a shear wall at the center of the perimeter walls provided better resistance to torsional motion due to plan eccentricity and to lateral displacement, whereas placing a shear wall at the building core provided better resistance to vertical ground displacement. These findings provide valuable insights into structural design optimization, offering a potential pathway to the development of aseismic structures.

Keywords: Seismic Analysis; Shear Wall; Response Spectrum; Storey Drift; Plan Irregularity; Concrete Buildings; Structural Designs; Ground Displacement; Aseismic Structures.

Received on: 29/10/2024, Revised on: 05/01/2025, Accepted on: 24/02/2025, Published on: 07/12/2025

DOI: 10.69888/FTSSM.2025.000572

FMDB Transactions on Sustainable Structures and Materials, 2025 Vol. 1 No. 2, Pages: 57-69

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