International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 11 Issue: 01 | Jan 2024
p-ISSN: 2395-0072
www.irjet.net
A Review on Seismic Performance of Plan Irregular Building With Different Structural Systems Yashvantsinh Thakor1, Aakash Suthar2 1 MTech student L.J University, Ahmedabad
2Aakash Suthar, Assistance Professor, Civil Engineering Department, L.J University, Ahmedabad, India
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Abstract - In today’s world where architectural innovation
landmarks—they are essential solutions to the challenges posed by rapid urbanization and population growth. As a result, the need for tall buildings has become paramount.
knows no bounds, irregular-shaped buildings have emerged as captivating landmarks. Lack of available land in densely populated cities forces architects to think unconventionally. Buildings with asymmetrical plans, re-entrant corners, and unconventional mass distributions stand out. These structures become iconic, representing cities and their evolving narratives. Irregular shapes introduce unusual dynamic characteristics. Abrupt changes in structural resistance demand special design considerations. Irregular buildings face unique challenges during earthquakes. Engineers must devise strategies to mitigate these effects, ensuring safety and minimizing damage. Factors like base shear and time period reveal structural vulnerabilities. Irregularities in mass and stiffness require dynamic analysis for taller buildings in higher seismic zones. In this study etabs models of horizontally irregular buildings are designed and seismic behavior of these structure are studied. Different kind of structural systems are examined like shear wall, framed tube, tube in tube system. Then response spectrum analysis was carried out and all results were compared to identify the suitable structural system against seismic forces. Key Words: irregular building, seismic behavior, response spectrum, shear wall, bare frame, framed tube, tube in tube system
1.INTRODUCTION
Figure 1 John Hancock Center in Chicago, example of the trussed tube structural design
In an era where land scarcity and population density collide, high-rise buildings emerge as a requisite. They embody the spirit of vertical growth, allowing us to rise above constraints and create sustainable, vibrant urban environments. As more people flock to cities, these towering edifices will continue to shape our skylines and redefine modern living.
India, with its burgeoning population, faces a unique set of challenges. Continuous migration to metropolitan areas, coupled with limited available land, has led to a congestion influx. In the bustling urban landscape of today, high-rise buildings have become an indispensable part of our architectural fabric. Cities like Delhi and Mumbai grapple with high population density, leaving little room for horizontal expansion. These soaring structures, often reaching far above the ground, serve as more than just
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Present research is done to investigate the seismic perfomance of horizontally irregular structure. To understand different parameters which get affected by the irregularity of structure and how we can counter this effects by using different structural systems like shear wall, framed tube, tube in tube structural system. Parameters like story drift, story displacement, story shear, base shear and time period were calculated for different structural systems and most suitable system was identified.
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