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ISSN: 2321-9653
Estd : 2013
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Ijraset Journal For Research in Applied Science and Engineering Technology

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Dynamic Seismic Analysis of Multi Storey Buildings in Seismic Zone V

Authors: Mohsin Aakib Shamim Akhtar

DOI Link: https://doi.org/10.22214/ijraset.2022.40154

Certificate: View Certificate

Abstract

In India, multi-storied buildings area unit sometimes created because of high value and deficiency of land. Earthquake could be a phenomenon which might generate the foremost harmful forces on structures. Buildings ought to be created safe for lives by correct style and particularisation of structural members so as to possess a ductile sort of failure. To protect such civil structures from significant structural damage, the seismic response of these structures is analyzed along with wind force calculation and forces such as support reactions and joint displacement are calculated and included in the structural design for a vibration resistant structure. The primary objective is to make associate earthquake resistant structure by enterprise seismal study of the structure by static equivalent methodology of study and do the analysis and design of the building by using STAAD PRO software in both static and dynamic analysis

Introduction

I. INTRODUCTION

Structural analysis is very important process for any structure as it ensures the stability, durability and economy of the structure. It is mainly concerned with the behavior of structure when it is subjected to external and internal forces. Frame structures (such as Concrete  frame  structures and Steel frame structures) entail various structural components such as stairs, ramp, beams, slabs, columns, foundation etc. vertical loads are the loads which act throughout the life span of buildings but horizontal loads may or may not act on the building. These loads are transferred from slabs to beams and then to columns. Then from columns, these loads are transferred to foundations and then ultimately to the soil. Soil must have enough bearing capacity to withstand the total load of the building without any deformations. Various tests are conducted on the soil in order to get the bearing capacity of the strata. Once the bearing capacity is known, then the type of foundation is decided. There are different types of foundations, shown in Figure 1. Which are being used according to the soil strata.

Struts and columns, they both are basically the compression structural components which can resist compressive forces as well as lateral forces generating within the structure. Struts, unlike column, are an inclined member. Conventionally, struts were used in steel structures such as buildings, bridges etc but now they are being used in RCC frame structures also. This  imparts large strength to the structure and helps in making it safe and economical. A strut can collapse due to buckling not by crushing. In simple words, a strut may be defined as a long, inclined colu

II. METHODOLOGY

A. Phase I: Modeling

For performing the current research work, total 6 models were prepared using Staad.Pro Software and they are mentioned as under:

Table 1. Description of Various Models

Type

Storey

Struts (bracing)

Type A

16 storey Building

None

Type B

16 storey Building

Single Cross Bracing

Type C

16 storey Building

Double Cross Bracing

Type D

20 storey Building

None

Type E

20 storey Building

Single Cross Bracing

Type F

20 storey Building

Double Cross Bracing

Other parameters of modeling are being represented in the table given below:

  • Height of each storey                     = 3.3 m
  • No. of bays in X-direction                = 8
  • No. of bays in Z-direction                =  6
  • Panel of each bay                           = 5.5 m x 6.5 m

Material properties which were assigned to different storey buildings are mentioned in table 2.

Table 2. Material Properties of Columns and Beams

Type of building

Floors

Column size (mm)

Beam size (mm)

Strut Size (mm)

Type A, B & C

1st to 4th floor

900 x 750 mm

600 x 450 mm

450 x 450 x 12 mm

 

5th to 8th floor

825 x 650 mm

575 x 380 mm

350 x 350 x 12 mm

 

9th to 12th floor

750 x 525 mm

450 x 380 mm

450 x 450 x 8 mm

 

13th to 16th floor

600 x 380 mm

380 x 300 mm

350 x 350 x 8 mm

Type D, E & F

1st to 4th floor

980 x 875 mm

600 x 500 mm

500 x 500 x 12 mm

 

5th to 8th floor

900 x 750 mm

600 x 450 mm

450 x 450 x 12 mm

 

9th to 12th floor

825 x 600 mm

575 x 380 mm

350 x 350 x 12 mm

 

13th to 16th floor

750 x 525 mm

450 x 380 mm

450 x 450 x 8 mm

 

17th to 20th floor

600 x 450 mm

380 x 300 mm

350 x 350 x 8 mm

B. Phase II: Seismic Analysis

Total 6 models (3 for 16 storey building and other 3 for 20 storey building) were prepared in Staad.Pro software using new seismic code IS: 1893-2016 with dynamic seismic analysis. Relative seismic parameters were considered such as seismic zone, type of structure, importance factor etc. Seismic zone V was taken for the present study. After the analysis, all the results were recovered from various sources of software.

III. RESULTS AND DISCUSSION

The so obtained results have been collected from the staad.pro are now represented in various forms such as tables and figures. With the help of such representations, the results were compared between the same storey building having different bracings. Displacement, being the main factor which was used to evaluate the structure’s lateral stability, was recorded at three different locations (displacement of corner columns, edge columns and central column) as shown in the figure below.

Table 3. Material Quantity of 16 Storey Building.

 

Concrete (m3)

Reinforcement Steel Kn

Steel Section( Kn)

Type A

3580.8

3764.36

-

Type B

3580.8

2461.04

4199.82

Type C

3580.8

2293.34

6299.73

Table 4. Material Quantity of 20 Storey Building.

 

Concrete (m3)

Reinforcement Steel (Kn)

Steel Section (Kn)

Type D

5046.8

5151.55

-

Type E

5046.8

3736.36

5777.98

Type F

5046.8

3174.66

8339.71

Conclusion

The present investigational study evaluates the high-rise building with and without struts as well as central core, the obtained results were studied carefully. From the represented results, following are the conclusions drawn for this current study: 1) For 16 storey building, the maximum displacement of column in Type A building, Type B and Type C building is 124.838 mm, 57.152 mm and 40.702 mm respectively. Therefore, the ratio of displacement of type B to type A is 0.46 and the ratio of displacement of type C to type A is 0.33. 2) For 20 storey building, the maximum displacement of column in Type D building, Type E and Type F building is 138.514 mm, 63.250 mm and 44.70 mm respectively. Therefore, the ratio of displacement of type E to type D is 0.46 and the ratio of displacement of type F to type D is 0.32. Therefore, from the above observations it can be finally concluded that there was a reduction of 54 % in maximum displacement when single cross strut bracing was provided in 16 Storey Building and 20 Storey Building. But with the addition of double cross strut bracing, there was a huge reduction of 67 % in maximum displacement of 16 Storey and 20 Storey Building. Therefore, evaluation of both the buildings reflects that the utilization of cross type strut can be done effectively.

References

[1] Sigmund A. Freeman, “Response Spectra as a Useful Design and Analysis Tool for Practicing Structural Engineers”, ISET Journal of Earthquake Technology, Vol. 44, No. 1, pp. 25–37, 2007. [2] Amit V. Khandve et. al.; “Seismic Response of RC Frame Buildings with Soft Storeys”, International Journal of Engineering Research and Applications (IJERA),Vol. 2, Issue 3, pp.2100-2108, 2012. [3] V. Sadeghi Balkanloua , M. Reza Bagerzadeh Karimib , B. Bagheri Azarc, Alaeddin Behraveshd “Evaluating Effects of Viscous Dampers on optimizing Seismic Behavior of Structures”, International Journal of Current Engineering and Technology, Vol.3, No.4, pp-1150-1157, 2013. [4] Mohamed A. A. El-Shaer “Seismic Load Analysis of different R.C. Slab Systems for Tall Building”, International Journal of Current Engineering and Technology, Vol.3, No.5, pp-2034- 2046, 2013. [5] A. E. Hassaballa, Fathelrahman M. Adam, M. A. Ismaeil “Seismic Analysis of a Reinforced Concrete Building by Response Spectrum Method”, IOSR Journal of Engineering, Vol. 3, Issue 9, pp-1-9, 2013. [6] Umesh.R.Biradar, Shivaraj Mangalgi “Seismic Response of Reinforced Concrete Structure by Using Different Bracing Systems International Journal of Research in Engineering and Technology, Volume: 03 Issue: 09, pp-422-426 (2014). [7] B Sri Harsha, J Vikranth “Study And Comparison Of Construction Sequence Analysis With Regular Analysis By Using Etabs” International Journal of Research Sciences and Advanced Engineering, Volume 2 , Issue 8, PP: 218 – 227, 2014. [8] Er. Raman Kumar et. al.; “Seismic Behaviour of Shear Wall Framed Buildings”, International Journal of Engineering Technology, Management and Applied Sciences, Vol. 2, pp. 28-38, 2014. [9] Venkatesh S.V. et. al.; “Effect of Different Lateral Load Resisting Systems on 2 X 7 Bays Building Frame Subjected to Lateral (Seismic) Load”, Proceedings of the 1st International Conference on Infrastructure Management, Assessment and Rehabilitation Techniques (ICIMART’14),pp.. A-1-2, 2014. [10] M.E. Ephraim, T.C. Nwofor, “Composite Behaviour of unbraced Multi-Storey Reinforced Concrete Infilled Frames Based on Modified One-Strut Model”, M.E. Ephraim Int. Journal of Engineering Research and Applications , Vol. 5, Issue 4, ( Part -1) pp.47-58, 2015. [11] Abhyuday Titiksh, Dr. M.K. Gupta, “A Study of the Various Structural Framing Systems Subjected to Seismic Loads”, SSRG International Journal of Civil Engineering (SSRG- IJCE),Vol. 2,Issue 4, 2015 [12] Tejashree Kulkarni et. al.; “Analysis and Design of High Rise Building Frame using Staad Pro” IJRET: International Journal of Research in Engineering and Technology, Vol.05, Issue 04, 2016. [13] Deepak, Mr. Vaibhav Gupta, “Seismic Analysis of High-Rise Open Ground Storey Framed Building” International Journal of Engineering Science and Computing, pp. 1713-1719, 2016. [14] K. Ramakrishna Reddy, Dr. S. Vijaya Mohan Rao, “Seismic Analysis of High Raised Building by Response Spectrum Method”, International journal of Advance Technology and Innovative Research, Vol. 08, pp. 4111-4118, 2016.

Copyright

Copyright © 2022 Mohsin Aakib Shamim Akhtar. 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.

ijraset40154Mohsin

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Paper Id : IJRASET40154

Publish Date : 2022-01-31

ISSN : 2321-9653

Publisher Name : IJRASET

DOI Link : Click Here

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