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TitleSeismic Analysis of Multistorey Building With FloaSeismic_analysis_of_multistorey_building_with_floating_columnting Column
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	CONTENTS
	INTRODUCTION………………………………………………………1-7
		Introduction…………………………………………………………………………1
		What is floating column…………………………………………………………….2
		Objective and scope of present work………………………………………………..7
		Organization………………………………………………………………………...7
	REVIEW OF LITERATURES………………………………………...8-12
	FINITE ELEMENT FORMULATION………………………………13-21
		Static analysis……………………………………………………………………….13
			Plane frame element………………………………………………………………13
			Steps followed for the analysis of frame…………………………………………15
		Dynamic analysis……………………………………………………………………16
			Time history analysis……………………………………………………………...17
			Newmark’s method………………………………………………………………..20
	RESULT AND DISCUSSION…………………………………………22-70
		Static analysis………………………………………………………………………..22
		Free vibration analysis……………………………………………………………...26
		Forced vibration analysis……………………………………………………………28
	CONCLUSION…………………………………………………………...71
	REFERENCES………………………………………………………...72-74
                        
Document Text Contents
Page 1

SEISMIC ANALYSIS OF MULTISTOREY BUILDING

WITH FLOATING COLUMN


A THESIS SUBMITTED IN PARTIAL FULFILLMENT OF
THE REQUIREMENTS FOR THE DEGREE OF





Master of Technology
In

Structural Engineering

By

Sukumar Behera

Roll No. : 210CE2261













Department of Civil Engineering,

National Institute of Technology

Rourkela- 769008

MAY 2012

Page 2

“SEISMIC ANALYSIS OF MULTISTOREY BUILDING

WITH FLOATING COLUMN”


A THESIS SUBMITTED IN PARTIAL FULFILLMENT OF
THE REQUIREMENTS FOR THE DEGREE OF



Master of Technology
In

Structural Engineering

By

Sukumar Behera

Roll No. : 210CE2261

Under the guidance of

Prof. A V Asha & Prof. K C Biswal











Department of Civil Engineering,

National Institute of Technology

Rourkela- 769008

MAY 2012

Page 46

27


Table 4.5 shows the value of free vibration frequency of the 2D frame calculated in present

FEM. It is observed from Table 4.5 that the present results are in good agreement with the result

given by Maurice Petyt [21].

Table 4.5 Free vibration frequency(Hz) of the 2D frame without floating column

Mode Maurice Petyt [21] Present FEM % Variation

1 15.14 15.14 0.00

2 53.32 53.31 0.02

3 155.48 155.52 0.03

4 186.51 186.59 0.04

5 270.85 270.64 0.08





Fig. 4.4 Mode shape of the 2D framework

Page 47

28


4. 3 Forced vibration analysis

Example 4.3

For the forced vibration analysis, a two bay four storey 2D steel frame is considered. The frame

is subjected to ground motion, the compatible time history of acceleration as per spectra of IS

1893 (part 1): 2002.

The dimension and material properties of the frame is as follows:

Young’s modulus. E= 206.84 x 106 kN/m2

Density, ρ = 7.83 x103 Kg/m3

Size of beam = (0.1 x 0.15) m

Size of column = (0.1 x 0.125) m













Fig. 4.5 Geometry of the 2 dimensional frame with floating column. Dimensions are in meter

Fig.4.6 shows the compatible time history as per spectra of IS 1893 (part 1): 2002. Fig.4.7 and

4.8 show the maximum top floor displacement of the 2D frame obtained in present FEM and

STAAD Pro respectively.

3

3

3

3

3 3

Page 92

73


10. Garcia Reyes, Hajirasouliha Iman, Pilakoutas Kypros, (2010),”Seismic behaviour of

deficient RC frames strengthened with CFRP composites”. Engineering Structures 32 (2010)

3075-3085.

11. Hartley Gilbert and Abdel-Akher Ahmed, “Analysis of building frames” Journal of

Structural Engineering, Vol. 119, No. 2, Page no:468-483, 1993.

12. Kattan P I (2003), “MATLAB guide to Finite Element”, Springer, Berlin & New York.

13. K. N. V. Prasada Rao, K. Seetharamulu, and S. Krishnamoorthy, “Frames with staggered

panels: experimental study” , Journal of Structural Engineering, VOL 110, No. 5, Page no:

1134-1148, 1984.

14. Krishnamoorthy CS, Finite element analysis, TMH Publications, 1987

15. Maison Bruce F. and Neuss Carl F., “Dynamic analysis of a forty four story building”,

Journal of Structural Engineering, Vol. 111, No. 7, Page No:1559- 572,July, 1985.

16. Maison Bruce F. and Ventura Carlos E., “DYNAMIC ANALYSIS OF THIRTEEN-

STORY BUILDING”, Journal of Structural Engineering, Vol. 117, No. 12, Page no:3783-

3803,1991.

17. Mortezaei A., Ronagh H.R., Kheyroddin A., (2009), “Seismic evaluation of FRP

strengthened RC buildings subjected to near-fault ground motions having fling step”.

Composite Structures 92 (2010) 1200–1211.

18. Niroomandia A., Maherib A, Maheric Mahmoud R., Mahini S.S. (2010) “Seismic

performance of ordinary RC frames retrofitted at joints by FRP sheets”. Engineering

Structures 32 (2010) 2326- 2336.

19. Ozyigit H. Alper, “Linear vibrations of frames carrying a concentrated mass”, Mathematical

and Computational Applications, Vol. 14, No. 3, pp. 197-206, 2009.

Page 93

74


20. Paz Mario (2010), “Structural dynamics”, CBS publishers.

21. Petyt Maurice (2010), “Introduction to Finite element vibration analysis” Cambridge

University Press, New York.

22. Sekulovic Miodrag, Salatic Ratko and Nefovska Marija, “Dynamic analysis of steel

frames with flexible connections”, Journal of computer and structures, Volume 80, Issue 11,

Page no: 935-955, Volume 80, 2002.

23. Vasilopoulosa A.A and Beskos D.E., “Seismic design of plane steel frames using advanced

methods of analysis”, Soil Dynamics and Earthquake Engineering Volume 26, Issue 12,

December 2006, Pages 1077-1100.

24. Williams Ryan J., Gardoni Paolo, Bracci Joseph M., (2009), “Decision analysis for

seismic retrofit of structures”. Structural Safety 31 (2009) 188–196.

25. Wilson E.L “Three dimensional Static and Dynamic analysis of structures-A physical

approach with emphasis on earthquake engineering”, Computers and Structures, Inc

Publication, 3rd Edition 2002.

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