Comparative Study of 30-Storey Building with and without Seismic Load Combination by using STAAD PRO

Abstract

This comparative study aims to evaluate the structural behaviour of a 30-storey building using STAAD Pro under two scenarios: with and without seismic load combinations. By comparing the results obtained from both cases, the study seeks to determine the significance of seismic design provisions and the impact they have on the structural performance of the building. The findings of this research will contribute to the understanding of the importance of incorporating seismic load combinations in the design process of high-rise buildings and aid in improving their safety and resilience.Seismic design provisions and load combinations are essential in ensuring the structural integrity of high-rise buildings. These provisions consider the effects of lateral forces generated by seismic activity and aim to minimize structural damage and protect human life during an earthquake. It is crucial to evaluate the performance of buildings under different loading conditions, including seismic load combinations, to ensure they meet safety standards and codes.

Introduction

I. INTRODUCTION

High-rise buildings are becoming increasingly common in urban areas, providing efficient use of limited space and accommodating growing populations. However, their structural design and performance become critical factors to ensure the safety of occupants, particularly under seismic events.

Earthquakes can exert significant forces on buildings, causing structural damage and compromising their stability.The problem addressed in this study is the lack of comprehensive understanding regarding the impact of seismic load combinations on the structural behavior of 30-storey buildings. While seismic design provisions are essential for ensuring the safety of high-rise structures, there is a need to evaluate their effectiveness and quantify their influence on the building's stability and performance. The use of STAAD Pro software provides a powerful platform for analyzing and designing structures, including the ability to incorporate seismic loads.

However, there is a gap in the research literature regarding a direct comparative study of a 30-storey building with and without seismic load combinations, using STAAD Pro as the analysis tool.

A. Objectives:

1. The primary objectives of this comparative study of a 30-storey building with and without seismic load combination, using STAAD Pro, are as follows:
2. To analyze and model a 30-storey building using STAAD Pro software, considering its geometrical specifications, material properties, and structural components.
3. To simulate and analyze the structural behavior of the building under non-seismic load combinations, such as dead loads and live loads, using STAAD Pro.
4. To simulate and analyze the structural behavior of the building under seismic load combinations, incorporating lateral forces generated by seismic activity, using STAAD Pro.
5. To compare and evaluate the structural response of the building under non-seismic load combinations and seismic load combinations, focusing on parameters such as displacements, member forces, and stresses.
6. To identify and analyze the critical areas within the building that are most affected by seismic load combinations, assessing their vulnerability and potential structural weaknesses.

II. LITERATURE REVIEW

[Mohammed Uvaish Mansoori , Rajesh Misra(2023)] this study is related to the how to design the pre-engineered building instead of Conventional Steel Building (CSB) design by using of Staad pro, software. Research shows that PEB structures are easy to design. These designs are effective and result in rapid construction.

[AbhiyankJoshi, Mr.RahulSharma(2022)]this study is related to the comparison between  two different grade of concrete used in the  structure. The comparison result shows that using different type of grade of concrete does notaffect the volume of concrete but is severely affect the amount of steel used (mainly inthe columns/vertical members).The building isplanned as peris 456 2000.The checks performed are according to the procedure defined by the Indianstandards.In the projectwith the help of software different figures are taken into account from the software graphs and designs.

[Ibrahim, et.al (April 2019)]: Design and Analysis of Residential Building(G+4): After analyzing the G+4 story residential building structure, conducted that the structure is rate in loading like dead load, live load, wind load and seismic loads. Member dimensions (Beam, column, slab) are assigned by calculating the load type and its quantity applied on it. Auto CAD gives detailed information at the structure members length, height, depth, size and numbers, etc. STADD Pro. has a capability to calculate the program contains number of parameters which are designed as per IS 456: 2000. Beams were designed for flexure, shear and tension and it gives the detail number, position and spacing brief.

[Dunnala Lakshmi Anuja, et.al (2019)]: Planning, Analysis and Design of Residential Building(G+5) By using STAAD Pro.: Frame analysis was by STAAD-Pro. Slab, Beams, Footing and stair-case were design as per the IS Code 456-2000 by LSM. The properties such as share deflection torsion, development length is with the IS code provisions. Design of column and footing were done as per the IS 456-2000 along with the SP-16 design charts. The check like one way shear or two-way shear within IS Code provision. Design of slab, beam, column, rectangular footing and staircase are done with limit state method. On comparison with drawing, manual design and the geometrical model using STADD Pro.

[Mr K. Prabin Kumar, et.al (2018)]: A Study on Design of Multi-Storey Residential Building: They used STADD Pro. to analysis and designing all structure member and calculate quantity of reinforcement needed for concrete section. Various structure action is considered as members such as axial, flexure, shear and tension. Pillar are delineated for axial forces and biaxial ends at the ends. The building was planned as per IS: 456- 2000.

[R.D. Deshpande et al., (2017)] has said that the structural analysis may be a branch that involves resolution of working on construction, so asto forecast the reply of real construction such as buildings, bridges, trusses etc. This project makes an attempt to view the construction working of varied elements inthe multi-storied building. Analysis, scheming and evaluation of multi-storied building has been obsessed for Basement+G+2 Building. According to material properties the dead load is calculated, live loads is taken from code.

III. METHODOLOGY

There are two load combination analysis of a building which can be done by the with seismic load and without seismic load combination .

Building Description and Specifications:

Utility of building: Residential building

Type of structure -multi-storey fixed jointed plane frame. Numberofstories30, (G+29)

1. Floorheight3.5m
2. No ofbays andbaylength4nos,5 m each.
3. MaterialsConcrete(M 35)andReinforcement(Fe500).
4. Sizeofcolumn .8m×.8m.
5. Sizeofbeam.45m×.45m
6. Depthof slab 125mm thick
7. Specificweight ofRCC 25KN/m3
8. Specificweightof infill19.2 KN/m3
9. Typeofsoil mediumsoil.
10. ResponsespectraasperIS1893.
11. SeismiczoneV(IS1893 (part1):2002).

VI. FUTURESCOPE

1. Advanced Seismic Analysis Techniques.
2. Performance-Based Design Approaches.
3. Optimization of Seismic Design Strategies.
4. Seismic Design for Non-Structural Components.
5. Integration of New Materials and Technologies.
6. Field Studies and Post-Earthquake Assessments.
7. Socioeconomic Implications.
8. Public Awareness and Education.

Conclusion

From the above comparison between two 30-storey build in gtaking same beam and column size using differen tload combination beamandcolumnsizeusingdifferentloadcombinationitwasclearlyvisible that the top beams of a building in seismic load combination required more reinforcement than the building gunder wind load combination (for example beam no 1351 required 17 no of 10 mmØ and 15 no of 10 mmØ bars whereas for wind load combination it required 4 nos of 12 mmØ and4nos of 12 mmØ).but the deflection and shear bending is more in wind load combination compare to seismic. But in lower beams more reinforcement is required for wind load combination. For column the area of steel and percentage of steel always greater required for wind load combination than the seismic load combination. The inclusion of seismic loads significantly improves the structural performance and resilience of the building. It reduces lateral displacements and accelerations, enhancing the stability and integrity of the structure during seismic events.

References

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Copyright

Copyright © 2023 Kusamakar Shukla, Dr. Gunjan Shrivastava. 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.