Analysis of Tall Building by Various Types of Structural Forms under Earthquake Analysis

Abstract

In the current world scenario, high-rise buildings are favoured due to the rapid rise in land values, land shortages, and to conserve land in rural areas for agricultural use. The construction of high-rise buildings primarily depends on wind and seismic loads. The performance of buildings depends on the structural configuration. The structural system of a high-rise building is designed to work with vertical gravity loads and mainly with lateral loads caused by wind and seismic activity. The structural system consists only of elements designed to transfer loads, all other elements that are not involved in the transfer of loads are called non-structural element. The research assist the analysis of G+16 Storey level with various mode of structural form used in tall building construction. The G+16 Tall building is modelled on CSI ETBAS for Zone 4 under seismic analysis by Response spectrum analysis. The various types of struural form used in the model 1 to model 6. The structural form consists of 1) Moment resisting frame 2) Building with Braced Frame Structure 3) Building with Hull-Core (Tube-in-Tube Structure) 4) Building with Shear Wall 5) Building with Composite 6) Building with Outrigger Structure. The research concluded that the model cases no 3 is optimised under the G+16 Storey building. Other than model 2, 4, 1 & 6 recommended for optimised case in descending order.

Introduction

I. INTRODUCTION

Building systems are also known as structural systems - a system that ensures the structural stability of a building. Depending on the nature of the building, one or more architectural systems can be applied to a single high-rise building. The adequacy of the lateral load bearing system must be determined by a structural engineer competent in the structural analysis and design of high-rise structures.

Tall buildings have become increasingly popular as a term in development and it has become a trend to build a tall building. Due to the scarcity of land in enclosed areas, the easiest option is to build a tall building to accommodate all the services. High-rise buildings are constructed as mixed developments, residential buildings, office functions, and other important features that must be included when designing high-rise buildings. In addition, depending on the characteristics of the building the structural engineer must select the building to proceed with the design. In addition, these structures described below can be identified as load-resistant systems.

There are various types of reinforcing structures such as reinforcing frame structures, Dry frame structures, Wall Structures, Tube in Tube and others.

II. OBJECTIVE OF THE RESEARCH

1. Study of various structural forms 1) Moment resisting frame 2) Building with Braced Frame Structure 3) Building with Hull-Core (Tube-in-Tube Structure) 4) Building with Shear Wall 5) Building with Composite 6) Building with Outrigger Structure. Analysis of G+16 Storey level with various mode of structural form used in tall building construction.
2. To model the  G+16 Tall building with various structural form cases in CSI ETBAS
3. Seismic analysis under Response spectrum analysis for Zone 4.
4. To find out the optimised model cases of structural form of G+16 Storey building.

III. METHODOLOGY & MODELLING

The different models are to be proposed for the in the building Tall Building taken: G+16

Conclusion

The list out conclusions made under the analysis of G+16 Storey level with various mode of structural form used in tall building construction. These conclusions are valid for this project only. 1) The Maximum Storey Displacement is reduced in Model 2,3,4,6 in X- direction with respect to Case 1. In Y direction Maximum Storey Displacement is reduced case 2,3,4,6. The higher value found in case 5. 2) Under deflection check in X & Y direction, X direction all case found satisfactory but in Y direction case 3 is under the limit. 3) On comparing Storey level Displacement model 5 found not recommended for construction. 4) In X direction shear value in column is found least in model 5, slightly increment found in the value for model 3, 4, 6. The higher value found in Model 2 as compare to Model 1 (Normal structural case). The same case found in Y direction also. 5) There is reduction in bending moment value in column found from model 2 to 5, there is increment found in the value for model 6 in X direction. For Y direction the higher value found in Model 2, 4, 5,6 as compare to Model 1 ( Normal structural case). Least value found in Model 3. 6) Increment in Base shear is found in new structural forms cases, due to extra elements introduced in the forms. Over all it is concluded that model case 3 Building with Hull-Core (Tube-in-Tube Structure) is optimised structure under G+ 16 storeys under respective location and zone. Other than model 2, 4, 1 & 6 recommended for optimised case in descending order.

References

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Copyright

Copyright © 2022 Mr. Harsh Kushwaha, Prof. Rahul Sharma. 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.