Influence of Staircase and Elevator Core Wall Location on the Seismic Capacity of Plan Irregular Structure

EasyChair Preprint 10204

Abstract

The increased frequency and intensity of earthquakes demand more seismic resistance in buildings. One of the effective approach to control deflection during an earthquake is via a shear wall. This research primarily focuses on several potential positions of the elevator core wall and staircase in an irregularly shaped structure where the mass and stiffness are concentrated at particular locations. Eccentricity in the mass and stiffness distributions causes a torsion reaction with a translation response. The location of the staircase and elevator core wall plays a vital role and changing the location of the staircase and core wall leads to torsional irregularity in the regular building. In this study, the analysis is made to understand the seismic behavior of regular and irregular RC buildings with and without the effect of staircase and elevator core walls with varying locations. Five models (10-storey RC structure) of various asymmetric ratios are compared, with the staircase and elevator core walls in various locations, such as ideal frame, centre, and opposite corners. The modelling and analysis are done using ETABS v19 software according to the Indian standard codes. A parametric study is conducted for the following parameters: storey displacements, storey drift, storey shear, and base shear by performing response spectrum analysis and time history analysis. According to the results obtained it is observed that the structure with a staircase and elevator core wall positioned at an opposite corner provides better performance than other structures.

Keyphrases: Elevator core wall, Plan irregularity, Staircase, Torsional irregularity

@booklet{EasyChair:10204,
  author    = {S C Manohar and Eshwar H N Reddy},
  title     = {Influence of Staircase and Elevator Core Wall Location on the Seismic Capacity of Plan Irregular Structure},
  howpublished = {EasyChair Preprint 10204},
  year      = {EasyChair, 2023}}