NAGPUR INSTITUTE OF TECHNOLOGY, NAGPUR (Department of civil engineering Session 2015- 16) 3 rd Project seminar on “Parametric study of multi storied R.C.C flat slab structure under seismic effect having different plan aspect ratio and slenderness ratio.” Submitted by Sourabh Kumar Shubham Borkar Under the guidance Prof. Sudhir Kapgate
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NAGPUR INSTITUTE OF TECHNOLOGY, NAGPUR(Department of civil engineering Session 2015-16)
3rd Project seminar on
“Parametric study of multi storied R.C.C flat slab structure under seismic effect having different plan aspect ratio and slenderness ratio.”
Parametric study of multi storied R.C.C. flat slab structure under seismic effect having different plan aspect ratio and slenderness ratio.
OBJECTIVE
To calculate design lateral forces on multi-storied R.C.C. Flat slab structure with regular building configuration in plan but different aspect ratio using “Response Spectrum Analysis.”
To calculate and study the response of structure situated in seismic zone IV and their comparison.
To determine limit aspect ratio and slenderness ratio for safe and stable structure.
To perform analysis using ETABS for static and dynamic analysis.
ASSUMPTIONS STRUCTURE Multi-Storey Flat-slab R.C. Structure PLAN DIMENSIONS
AREA 900 m2 TABLE : MODEL GROUP FOR ASPECT
RATIO (L:B)
MAIN GROUP ASPECT RATIO LENGTH WIDTH COLUMN SPACING
L : B L (m) B(m) X(m) Z(m)
M1 1 30 30 6 6
M2 2 41 22 5.85 5.5
M3 3 50 18 5 6
M4 4 60 15 6 5
M5 5 75 12 6.25 6
TABLE : MODEL FOR SLENDERNESS RATIO (H:B) SR.NO MODEL GROUP MODEL ASPECT RATIO NO. OF STOREY STOREY HEIGHT SLENDERNESS RATIO
• TABLE : MODEL FOR SLENDERNESS RATIO (H:B) Contd..
SR.NO MODEL GROUP MODEL ASPECT RATIO NO. OF STOREY STOREY HEIGHT SLENDERNESS RATIO
(L:B) 3.60 (H:B)
16
M4
M41
4
3 14.40 0.96
17 M42 5 21.60 1.44
18 M43 7 28.80 1.92
19 M44 9 36.00 2.4
20 M45 11 43.20 2.88
21
M5
M51
5
3 14.40 1.11
22 M52 5 21.60 1.66
23 M53 7 28.80 2.22
24 M54 9 36.00 2.77
25 M55 11 43.20 3.32
DATA FOR SEISMIC ANALYSIS EARTHQUAKE LOAD As Per IS 1893 (Part 1)-2002TYPE OF FOUNDATION Isolated Column Footing DEPTH OF FOUNDATION 3.5mTYPE OF SOIL Type II, Medium As Per IS 1893 BEARING CAPACITY OF SOIL 200 kN/m2AVERAGE THICKNESS OF FOOTING 0.9 m IMPORTANCE FACTOR 1PERCENTAGE DAMPING 5%TYPE OF FRAME Special moment resisting Frame
METHOD OF ANALYSIS RESPONSE SPECTRUM METHOD LOAD CASES
ANALYSIS OF 11 STOREY R.C. STRUCTURE
PLAN ASPECT RATIO (L/B)= 1SLENDERNESS RATIO (H/B)= 1.32
PLAN ELEVATION
ANALYSIS DATA
TABLE: Modal Periods and FrequenciesCase Mode Period Frequenc
METHODOLOGYSR.NO SEMESTER ACTIVITY DURATION1. VII Review of existing literature by different research 1 month
2. VII Study of IS 1893:2002 and IS 13920 learning Software ETABS
3 month
3. VII Formulating the assumption stating the scope of project by considering various parameter
1 month
4. VIII Modeling and analysis of the structure with the help of software
1 month
5. VIII Comparison of the data obtained after analysis 2 month
6. VIII Understanding the results of analysis, formulating Conclusion and further recommendation keeping scope of study in mind
2 month
7. VIII Dissertation writing 1 month
• Prof. K S Sable, Er. V A Ghodechor, Prof. S B Kandekar, “Comparative Study of Seismic Behavior of Multistory Flat Slab and Conventional Reinforced Concrete Framed Structures”, International Journal of Computer Technology and Electronics Engineering (IJCTEE) Volume 2, Issue 3, June 2012
• Rucha.S.Banginwar, M.R.Vyawahare, P.O.Modani, “Effect of Plan Configurations on the Seismic Behavior of the structure By Response Spectrum Method” ,International Journal of Engineering Research and Applications(IJERA),Vol2,May-June2012
• Arun Solomon A, Hemalatha G, “Limitation of irregular structure for seismic response”, International Journal Of Civil And Structural Engineering Volume 3, No 3, 2013
• Mohit Sharma and Dr. Savita Maru(2014), “Dynamic Analysis of Multistoried Regular Building” , Journal of Mechanical and Civil Engineering (IOSR-JMCE), Volume 11, Issue 1 Ver. II.
• Mayuri D. Bhagwat and Dr.P.S.Patil(2014), “Comparative study of performance of rcc multistory building for Koyna and Bhuj earthquakes”, International Journal of Advanced Technology in Engineering and Science Volume No.02, Issue No. 07.
• Dr. V.L. Shah and Late Dr. S.R. Karve, “Illustrated design of reinforced concrete buildings”, Sixth edition, Structures publications, 36 Parvati, Pune-411009.
REFERENCES
• Paz. Mario. “Structural Dynamics" theory and Computation, CBS, Publishers and Distributors Dayaganj, New Delhi.
• C. V. R. Murty, Rupen Goswami, A. R. Vijayanarayanan and Vipul V. Mehta, “Some Concepts in Earthquake Behaviour of Buildings”, Gujarat State Disaster Management Authority Government of Gujarat.
• BIS-1893, Criteria for Earthquake resistant design of structures-Part-1, General Provisions and Buildings, Bureau of Indian Standards, New Delhi -2002.
• I.S-13920."Ductile detailing of reinforced structures subjected to seismic force" code of practice Bureau of Indian Standards, New Delhi -1993.
• I.S. 456-2000, Indian Standard Code of Practice for Plain and Reinforced Concrete, Bureau of Indian Standard, New Delhi.
• IS-875-1987.".Indian standard code of practice for structural safety loadings standards Part-1, 2" Bureau of Indian Standards, New Delhi.
• I.S 4326 – 1993, Earthquake Resistant Design And Construction Of Buildings - Code Of Practice, Bureau of Indian Standard, New Delhi
• SP-16-1980- Design Aids for Reinforced concrete to IS-456-1978-Bureau of Indian Standards, New Delhi.
• SP 22 : 1982 Explanatory Handbook On Codes For Earthquake Engineering, Bureau Of Indian Standard, New Delhi
• www.nicee.org, The National Information Centre of Earthquake Engineering (NICEE - established 1999)