• Version
• Download 28
• File Size 379.71 KB
• File Count 1
• Create Date 12 November 2025
• Last Updated 13 November 2025

Effect of Vertical Irregularities in Stiffness Due to Seismic Activity with And Without Girder

 

 

Musaddique Q. Bandirkar1, Prof. Abhijeet R. Undre2

1ME Student, KJ’s Educational Institute, KJ College of Engineering and Management Research, Pune,

Maharashtra (Affiliated to Savitribai Phule Pune University)

2Associate professor, KJ’s Educational Institute, KJ College of Engineering and Management Research,

Pune, Maharashtra (Affiliated to Savitribai Phule Pune University)

 

 

Abstract
Vertical irregularities in structural stiffness play a crucial role in the seismic performance of multi-storey buildings, particularly in earthquake-prone regions. These irregularities arise from variations in the lateral rigidity of a building’s structural elements along its height, leading to uneven distribution of seismic forces. This study investigates the impact of vertical stiffness irregularities on the seismic behavior of buildings, focusing on the "soft-storey" effect where certain floors experience disproportionately higher seismic forces. Additionally, the role of girders in improving the lateral stiffness and overall seismic resilience of such buildings is explored. By analyzing buildings with and without girders, the research highlights how the inclusion of girders helps distribute seismic forces more uniformly, reducing inter-storey drift and mitigating the risk of structural failure. The findings underscore the importance of incorporating girders in the design of buildings with vertical irregularities to enhance their seismic performance and ensure greater structural stability. This paper also explores the challenges and potential solutions in improving building designs to withstand seismic events effectively.

Keywords: vertical irregularities, seismic performance, soft-storey effect, lateral stiffness, girders, structural stability.

Download