International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 13 Issue: 02 | Feb 2026
p-ISSN: 2395-0072
www.irjet.net
Comparative Study on Stress for Static Analysis and Frequency Analysis Ismail 1, Dr. N. Jayaramappa 2 1
PG Student, Civil Engineering, University of Visvesvaraya College of Engineering, Bangalore-560056, India 2 Professor, Civil Engineering, University of Visvesvaraya College of Engineering, Bangalore-560056, India ------------------------------------------------------------------------------***---------------------------------------------------------------------------------
Abstract: This project focuses on the structural analysis of a G+8 reinforced cement concrete commercial office building
with the help of ANSYS Workbench. The main aim is to understand how the building behaves under different loads such as dead load, live load, and wind or seismic effects. A 3D model of the structure is created, material properties are assigned, and suitable boundary conditions are applied before running the analysis. The study observes Total deformation, Stresses distribution and Natural frequency overall building structure. By using simulation, it becomes easier to identify critical areas and evaluate safety without physical testing. The results help in understanding the performance of the building and support better design decisions for safe and efficient construction. This work also highlights the importance of numerical simulation in modern structural engineering practice. Instead of depending only on manual calculations, ANSYS Workbench allows detailed visualization of how forces travel through beams, columns and slabs. The response of the structure is studied through stress patterns and displacement results, which helps in understanding whether the building satisfies basic safety and serviceabilit y requirements, the simulation stresses are within the allowable permissible limit’s as per standard IS 456-2000 code for the concrete [M25] material. Keywords: Commercial Office Building G+8, Static Structural Analysis, Equivalent von misses Stresses, Modal Analysis Natural Frequency,
1. Introduction This project report presents the planning, design, and construction of a G+8 commercial office building made with M25 grade concrete. The building is designed to meet modern standards of safety, functionality, and aesthetics, while ensuring durability and cost- effectiveness. The structure consists of a ground floor and eight upper floors, which will be used for commercial and office purposes. Each floor is planned to provide flexible working spaces, conference rooms, and service areas to support the daily operations of businesses. The main goal of this project is to create a safe and sustainable building that meets the growing demand for office spaces in urban areas. The design focuses on proper space utilization, structural stability, and efficient use of materials. Special attention has been given to providing adequate natural light, ventilation, and accessibility features to create a comfortable environment for users. The building is constructed using reinforced cement concrete (RCC) with M25 grade concrete, which offers good strength and durability for multi-story structures. M25 concrete, with a characteristic compressive strength of 25 N/mm², is suitable for heavy load-bearing components such as columns, beams, and slabs. The reinforcement used in the structure helps resist tension and improves the overall performance of the building under various loads. Modern construction techniques and equipment have been used to maintain quality and ensure timely completion of the project. The design also follows relevant Indian Standards (IS codes) for structural design, earthquake resistance, and safety provisions. Environmental aspects, such as waste management, water conservation, and energy efficiency, have been considered to make the building eco-friendly.
2. Materials Selected Concrete [M25]: M25 grade concrete is widely used in RCC buildings because it provides good strength and durability for structural members. It is designed to achieve a compressive strength of 25 MPa after 28 days of proper curing. This grade is suitable for beams, columns, slabs, and footings in multi-story structures. M25 concrete offers a good balance between strength and workability, making it easy to place and compact at the construction site. With proper mixing and curing, it ensures safety, stability, and long-term performance of the building. Table 1: Materials Properties based of Concrete [M25]
© 2026, IRJET
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Property’s
Units
Concrete [M25]
Young’s Modulus
MPa
25000
Density
Kg/mm3
2.5e-06
Impact Factor value: 8.315
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ISO 9001:2008 Certified Journal
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Page 551