International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 09 Issue: 07 | July 2022
p-ISSN: 2395-0072
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Seismic Response of Vertically Irregular Structure with Composite Columns Surumi Backer P1, Soni Syed2 1PG
student, Dept of Civil Engineering, KMEA Engineering College, Kerala, India Professor, Dept of Civil Engineering, KMEA Engineering College, Kerala, India ---------------------------------------------------------------------***--------------------------------------------------------------------2Assoc.
Abstract – Behaviour of a multi-storey building depends on
In a Composite Structure when a steel component, like an I section beam, is attached to a concrete component such that there is a transfer of forces and moments between them, then a composite member is formed. In such a member, the high strength of the concrete in compression complements the high strength of the steel in tension. Here it is very important, that both the materials are used to fullest of their capabilities. This gives an efficient and economical construction.
its structural configuration during strong earthquake motion. One of the major causes of failure during earthquake is recognized as the Irregular configuration of the building either in plan or elevation. Structures generally possess combination of irregularities, the choice of type, degree and location of irregularities in the design of structures is important as it helps in improving the utility as well as aesthetics of the structures. And the use of composite materials is of particular importance, due to its significant potential in improving overall performance of the structures. In composite column construction, steel and concrete are unites in such a manner that materials are efficiently employed. In this study, the seismic response of a regular structure with composite column is compared with that of a regular structure. Vertically irregular structures are modelled by changing the distribution of mass, stiffness and strength along the height. The analysis is carried out by ETABS software, which is commonly used for structural analysis and design of building. By this study, it is possible to quantify the effects of vertical irregularities on the seismic performance of structures.
In this investigation, a vertically irregular structure with composite column is compared with that of a regular structure.
2. SCOPE AND OBJECTIVES
Key Words: Seismic response, Configuration, Vertical irregularity, Displacement, storey drift, Time period, ETABS, Time history analysis
1. INTRODUCTION In India, majority structures fall under the category of lowrise buildings. So, for these structures reinforced concrete members are used extensively because the construction becomes relatively convenient and provident in nature. But since the population is growing exponentially and the land is limited, there is a need of vertical growth of buildings. So, for the fulfilment of this purpose a large number of medium to high rise structures are coming up these days. For these high-rise structures, it has been noted that use of composite members in construction is more effective and profitable than using reinforced concrete members. Reinforced concretes frames are used in low rise structures because loading is nominal. But in medium and high-rise structures, the conventional reinforced concrete construction cannot be adopted as there is increased dead load along which is relatively vulnerable to hazards. In India use of steel is very less in construction industry compared to other developing nations like China, Brazil etc.
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A seismic analysis of multi-storied composite structure is carried-out for different parameters of vertical irregularities.
The installation of composite column in a construction increases strength, fire resistance and resistance towards lateral forces.
To ensure safety while constructing buildings in future.
To study the seismic performance of an irregular multistorey building with composite column.
To understand the behavior of vertical irregular structure with composite column on the basis of shear force, storey drift and storey displacement.
3. METHODOLOGY The methodology adopted in order to lay focus on achieving the objectives is as follows: Three-dimensional mathematical modelling of Composite column building in ETABS software. Validation of software using ETABS software. Modelling of additional models in ETABS. Comparison of displacement, storey drift and base shear obtained using equivalent static analysis and response spectrum analysis. Interpretation of results.
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