International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 11 Issue: 08 | Aug 2024
p-ISSN: 2395-0072
www.irjet.net
Study of High Rise Building with Outrigger System subjected to Transverse Loading Mr. Rushikesh Rajendra Hedgire1, Mr. R. R. Badeghar 2 1P.G. Student, Department of Civil Engineering, N.B. Navale Sinhgad College of Engineering, Solapur
2Assistant Professor, Department of Civil Engineering, N.B. Navale Sinhgad College of Engineering, Solapur
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Abstract - Accumulation of growing population
bending deformation, such as story drifts, and the force causing the building to tip over exceeds the force causing it to shear. These core outrigger systems serve as the lateral load resisting systems in such cases. The utilization of outriggers is implemented to create a tension-compression pair in the perimeter columns in situations where the central core of a structure endeavors to tilt. The aforementioned process facilitates the reversion of the core to its initial position and augments its ability to resist overturning by amplifying its rigidity. The outrigger beams or cross bracing supports, which are attached to the external columns and shear wall, exhibit a certain level of complexity. However, it is widely acknowledged that the key factors that impact the performance of linked wall systems are the proper rigidity and strength of the outrigger beams. In order to minimize lateral deflection and inter-story drift, it is crucial to uphold a high level of overall rigidity in tall structures. The performance of the outrigger system is affected by the outrigger locations along the height of the building, the number of level of outriggers provided, their plan locations, presence of the belt trusses, outrigger truss depth and primary structural materials used in our study, braced core frame i.e. reinforced concrete shear wall core acting in conjunction with the concrete. belt truss and outrigger struts are provided which resist the earthquake loads by stiffening the whole structure.
especially in developing countries has resulted in an increased height of buildings, this need creating impact on structural development of tall building. And hence tall building construction has been rapidly increasing worldwide. The development in concrete technology over the twentieth century covering materials, structural systems, analysis and construction techniques, made it possible to build concrete tall buildings. The primary function of a structure is achieved through the utilization of various structural systems. These systems include bracing systems, moment-resisting frames, and shear walls. When aiming to control the horizontal displacement of a structure, it is crucial to prioritize the lateral forces as the most significant factors. Over the years, a variety of mechanisms have been developed to resist lateral loads. The utilization of outrigger-belt truss systems is widespread globally due to their exceptional efficiency. The outrigger with belt truss is a structural solution that effectively regulates excessive deviation caused by lateral tension. The implementation of this solution will lead to an improvement in the performance of the building. It will effectively protect the building from potential damage caused by both seismic and atmospheric stresses, including both structural and non-structural harm. The current study utilized the Etabs 2018 software to simulate a multi-story R.C.C. building consisting of 40, 45, and 50 floors. The research on response spectrum is conducted specifically on structures that are situated in zone III. The Etabs 2018 software is designed to analyze building models and investigate the effects of various parameters. These parameters include maximal displacement, time period, base shear, storey shear, and base moments.
2. LITERATURE REVIEW Komal et. al. [1] The primary factors that contribute to the susceptibility of a high-rise structure's performance are storey displacement and storey drift. These two phenomena are primarily caused by seismic forces in regions with high seismic activity. Several methodologies have been employed to improve the efficiency of tall structures in various research projects. The utilization of core shear walls, bracing systems, dampers, and other comparable measures are encompassed by these methods. Although these methods can partially reduce storey displacement, the overall performance degradation of the building is ultimately limited by storey drift. The study project is utilizing the outrigger technique, which is considered outdated, to minimize the disturbance of the structure during seismic tremors. The reason for this is the presence of a constraint. The purpose of this investigation is to evaluate the performance of the cantilever structural system in high-rise structures located in seismic zones. This evaluation will be
Key Words: Outrigger-belt truss system, tall building, Response spectrum analysis, Etabs software.
1.INTRODUCTION An outrigger system is a horizontal component that resembles a deep beam. It is used to increase the rigidity and strength of a structure against overturning by connecting the building core or spine to the farthest or exteriormost columns and maintaining the columns in place. The lateral movement is reduced by implementing this solution. The utilization of core outrigger systems is a common practice in high-rise structures with a slender profile when the primary cause of the building's sideways movement is the overall
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