Seismic Analysis of Steel Building with Bracing

Abstract

As we know that construction of steel buildings is popular nowadays. To protect buildings from earthquake by providing bracings are very common. Bracing help to resist the lateral load during earthquake. Bracings are providing in structure at various configuration. This paper illustrates the effect of new bracing configuration with existing x bracing configuration. The seismic analysis of the structure has been carried out using ETABS Software.

Introduction

I. INTRODUCTION

Earth quakes are the natural phenomenon’s which are caused by the release of large strain energy by the moving faults below the surface of the earth, which ultimately causes the shaking of the earth top surface in all possible directions with different amplitudes and intensities of lateral forces. In case of steel structure to resist the lateral force and increase the stiffness of steel frame, so bracings play very vital role. Bracing will make the structure indeterminate. Its stiffness the structure and also helps to resist the sway of the structure.

Common reason for providing bracing on steel building is to control the buckling, increase the stiffness and to resist lateral load. In steel building there is a chance of buckling by providing bracing the buckling and stiffness of the structure can be improved to a limit. So here bracing with different configuration are provided in regular and irregular building to know the performance of the building.

A. Bracing

Bracing systems helps to evenly distribute load and increase the safety of the structure. Bracing types-Single diagonal, Cross Bracing, K-bracing, V- bracing.

B. Frame With Bracing Configuration

Here in my study, I took an already existing x bracing configuration to done a comparative study on new configuration ie crisscross

Configuration to know the effectiveness.

Conclusion

On the bases of present study following result has been constructed: 1) A proper lateral load resisting system is required to increase lateral strength and stiffness of high-rise buildings. 2) In present study two types of bracing ie. X-bracing and crisscross bracing are used as a lateral load resisting system which reduced lateral displacement from 196.7 mm in bare frame to 23.4 mm, but increased base shear from 1056 KN to 1683 KN which is not a desirable situation. 3) In overall comparison of bare frame and bracing system, frame provided with crisscross bracing configuration has good structural performance as compare to other systems.

References

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Copyright

Copyright © 2022 Ms. Aradhya Anna Alex, Ms. Chaithra S. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.