Title: Global Perspectives and Emerging Dimensions of Multidisciplinary Research
Chief Editors: Dr. Jagdish Kumar Sahu and Ms. Machado Sneha John
Associate Editors: Dr. Sree Lakshmi Ammanamanchi and Dr. Divya R. Patel
Co-Editors: Mr. Hruthik J. R and Dr. Shishira Srinivasa
ISBN: 978-93-7183-027-0
Chapter: 13
DOI: https://doi.org/10.59646/833/13
Author: Prof. Sahana T Swamy
Abstract
Modern buildings have grown increasingly complex, resulting in the use of more and more reinforced concrete frames with irregular geometry and their influence upon the building response in the event of an earthquake. The current research paper is aimed at a comparative study of the seismic behaviour of reinforced concrete frames with an irregular geometry with respect to their strength, stiffness, displacement, and overall structural response to seismic load. The study is carried out using comparative analytical approach where each of the structural models with various geometric configurations are evaluated by the seismic analysis method. The study showed that, typically, the lateral movement, inter-story drift, stiffness distribution and internal forces of irregular reinforced concrete frames differed from those of regular reinforced concrete frames. The seismic forces may be unevenly distributed because of geometric irregularities such as vertical and plan irregularities, and can also cause the demands of structure to concentrate on critical members and stories. Such effects may affect the stability and damage potential of reinforced concrete structures under strong ground motions. Furthermore, the seismic response is different depending on the type and severity of irregularity, which reinforces the need to take into account the configuration of the structure in the design stage. The paper can also describe the significance of suitable seismic design measures, structural analysis and detailing for enhancing the behavior of irregular reinforced concrete frames. This research illustrates the use of careful consideration of geometric irregularity to help ensure safer and more resilient structural design in earthquake prone areas. Comparative analysis can be beneficial to the structural engineers, designers and building authorities to have a better understanding of the seismic performance of irregular reinforced concrete frame structures, and to form effective seismic design strategies for these structures. The results can assist in existing knowledge of seismic structural engineering by serving as a platform for the better assessment and design of reinforced concrete buildings with irregularity configuration.
Keywords: Seismic performance, Reinforced concrete frames, Structural irregularity, Seismic analysis, Earthquake engineering, Plan irregularity, Vertical irregularity, Inter-story drift, Structural response, Earthquake-resistant design