[4] SEISMIC PERFORMANCE ANALYSIS OF OPEN GROUND STOREY STRUCTURES: INFLUENCE OF BUILDING HEIGHT AND LATERAL LOAD RESISTING SYSTEMS: Date of Submission: Nov 06, 2023, Revised: Nov 27, 2023, Accepted: Dec 10, 2023, CrossRef d.o.i. : https://doi.org/10.56815/IJMRR.V2I4.2023/19-28. How to Cite: H. S.Vishwanatha, Sreekeshava K S (2023). Seismic Performance Analysis of Open Ground Storey Structures: Influence of Building Height and Lateral Load Resisting Systems. International Journal of Multidisciplinary Research & Reviews. 2(4). 29-50.

H. S. Vishwanatha; Sreekeshava K S

Authors

H. S. Vishwanatha Head of the Department, Department of Civil Engineering, M.E.I Polytechnic, Bengaluru, Karnataka, India.
Sreekeshava K S Head of the Department & Associate Professor, Department of Civil Engineering Jyothy Institute of Technology, Bengaluru, Karnataka, India

Abstract

Open Ground Storey (OGS) structures are inherently vulnerable to seismic failure due to their soft storey behavior, which significantly reduces lateral stiffness and increases the risk of collapse during earthquakes. To address this critical issue, the implementation of additional Lateral Load Resisting Systems (LLRS) is essential for enhancing the seismic resilience of these buildings. This study focuses on the behavior of three-dimensional (3-D) OGS infilled reinforced concrete (R.C.) frames subjected to seismic loads. Specifically, it investigates two types of LLRS: the provision of stiff columns at the ground floor and the installation of shear walls in various locations and configurations. The performance of these enhanced OGS structures is compared with conventional OGS configurations and bare frames, both with and without considering the effects of infilled frames. A comprehensive literature survey revealed several gaps, including the limited analytical investigations on the feasibility of shear walls as LLRS for OGS structures under lateral (earthquake) loads, the predominance of two-dimensional (2D) single bay models in existing studies, and the absence of comparative analyses across different building heights and earthquake zones as specified in IS 1893-2002. To bridge these gaps, the present study employs analytical modeling and analysis using SAP 2000 to evaluate 3-D R.C. framed structures with varying heights (low, medium, and high), different heights of the open ground floor, and across all seismic zones outlined in IS 1893-2016. Additionally, the study assesses the relative performance of shear walls placed at corners, sides, cores, and combinations thereof. The primary objectives of this research are to understand the dynamic behavior of infilled and OGS frames during earthquakes, evaluate the effectiveness of different LLRS configurations in providing adequate lateral strength, stiffness, and ductility, and identify the optimal shear wall arrangements to mitigate the soft storey effect. By achieving these objectives, the study aims to inform structural design practices, ensuring the safety and minimal damage of high-rise OGS buildings in seismic regions.