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International Research Journal of Engineering and Technology (IRJET)

e-ISSN: 2395-0056

Volume: 12 Issue: 06 | June 2025

p-ISSN: 2395-0072

www.irjet.net

Seismic Analysis of Multi-Story Building by E-Tabs Software Chaitanya A. Khotare1, Aniket G Dond2, Rohit J Aware3, Aniket V. Barve4, Prof. N.N Shewale5 1234First Department of Civil Engineering, Sanghavi College of Engineering-Nashik, Maharashtra, India 5Professor, Dept. of Civil Engineering, Sanghavi college of Engineering-Nashik, Maharashtra, India

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Abstract - The response spectrum method has long served

as a critical tool for researchers and engineering professionals in understanding structural behavior under seismic loading. With evolving construction practices and increased emphasis on seismic resilience, response spectrum analysis is gaining prominence in the design of modern multi-storey buildings. This research aims to discuss the principles and practical application of the method for structural engineers, particularly within the framework of IS 1893 (Part 1): 2002. A 30-storey reinforced concrete (RC) building is analyzed using ETABS 2016 under dead, live, and seismic loads. The building is evaluated across seismic zones II, III, IV, and V to assess variations in base shear, axial force, bending moment, displacement, and tensile forces. The study highlights the importance of seismic zoning and the integration of response spectrum analysis in high-rise building design for improved strength, stability, and serviceability.

1.2 Problem Statement 1. 2. 3. 4.

1. 2.

Zones, High-Rise Building Design, ETABS 2016, IS 1893 (Part 1): 2002

1.INTRODUCTION

Seismic analysis evaluates how structures respond to ground shaking during earthquakes, considering inertia and resulting lateral forces. Since real-time earthquake records aren’t always available, the response spectrum method is widely used for estimating peak responses. Equivalent static analysis is suitable for simple structures, while dynamic analysis is needed for complex ones. Concrete's versatility makes it a preferred material, but durability factors must be considered. Structural design should account for building components like slabs, beams, columns, and footings. Modern tools support performance-based design, though complexity limits their use. Manual verification of software outputs remains essential for safe and reliable designs.

Rinkesh R. Bhandarkar (2012)-Studied seismic analysis of multistory buildings with plan and vertical irregularities using ETABS. Found buildings on sloping ground more vulnerable to earthquakes than those on plain ground. Rahul Ghosh & Debbarma (2017)-Used equivalent static, response spectrum, and time history methods to analyze setback buildings and suggested techniques (infill walls, RCFST columns, shear walls) to mitigate soft storey effects. Kolasani Rajasekhar & Maganti Janardhana (2019)Compared dynamic responses of RC framed buildings on plain and sloping ground considering infill wall stiffness.

To perform seismic evaluation of the structure. To analyze the structural responses under seismic loading conditions. To compare the seismic response results of the structure across different seismic zones (Zone-II, Zone-III, Zone-IV) using E-TABS software.

Impact Factor value: 8.315

This method provides a technique for performing an equivalent static lateral load analysis. It enables a clear understanding of the contributions of different vibration modes. It offers a simplified approach for determining design forces for structural members subjected to earthquake loads. It is useful for the approximate evaluation of the seismic reliability of structures.

2.LITERATURE REVIEW

1.1 Objective

Perform seismic evaluation of a 12-story building with uniform story height using E-TABS software. Analyze structural responses under seismic loads across Zone-II, Zone-III, and Zone-IV. Use equivalent static lateral load analysis to estimate seismic forces and mode contributions. Compare seismic responses across zones to assess the building’s seismic reliability and design implications.

1.3. Scope

Key Words: Response Spectrum Analysis, Seismic

1. 2.

To investigate a 12-story building model with a uniform storey height of 10 ft.

G Ajay & A Gouthami (2019)-Analyzed seismic performance of regular and vertical irregular RC frames with/without shear walls on sloping and plain ground using response spectrum and time history methods.

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