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Presentation on EARTHQUAKE RESISTANT DESIGN OF LOW-RISE OPEN GROUND STOREY FRAMED BUILDING

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Page 1: shailesh mtech

Presentation on EARTHQUAKE RESISTANT DESIGN OF LOW-RISE OPEN GROUND STOREY FRAMED BUILDING

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Introduction Classification of Buildings. Aim and Objective Seismic Behaviour of Open ground storey

building Methodology Multiplication Factor Conclusion from research papers Work I do Refrence

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Introduction• Due to increasing population since the past few years car

parking space for residential apartments in populated cities is a matter of major concern. Hence the trend has been to utilize the ground storey of the building itself for parking.

• These types of buildings (Fig. 1.1) having no infill masonry walls in ground storey, but infilled in all upper storeys, are called Open Ground Storey (OGS) buildings.

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• Fig 1.1 EXAMPLE OF OGS

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Classification of building • Acc to storey• Low Rise building :Upto 3 Stories• Medium Rise Building: 4 to 7 Medium Rise Building• High Rise Building :Above 7

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Aim and Objective

• To study the effect of infill strength .• To check the applicability of the multiplication factor of 2.5 as

given in the Indian Standard IS 1893:2002 for design of low rise open ground storey building.

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Seismic Behavior of OG/S

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Methodology

• (i) Review the existing literature and Indian design code provision for designing the OGS building .

• (ii) Select an existing building model for the case study.• (iii) Model the selected building with and without considering

infill strength/ stiffness. • (iv) Linear analysis of the selected building model and a

comparative study on the results obtained from the analyses. • (v) Nonlinear analysis of the selected building model and a

comparative study on the results obtained from the analyses. • (vi) Observations of results and discussions

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Analysis• Linear Analysis• Non linear Analysis• Linear Analysis = 1 Seismic Coefficient Method 2 The Response Spectrum Approach 3 Response History Method or Time History

Method Non Linear Analysis =Pushover analysis

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Linear analysis

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Push over analysis

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Magnification Factor• Magnification Factor: It is the ratio of Bending Moment/Sheer

Force of building with infill to corresponding value of bare frame

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Conclusion from research papers• From analysis it is clear that there is no effect of zone on

magnification factor. • IS 1893 (2002) recommend magnification factor of 2.5 to be

applied on calculated shear force and bending moment is very high.

• The magnification factor (MF) for bending moment is in the range of 1.06-1.98 for columns and for beam is in range of 0.92-1.06 of ground storey. Magnification factor (MF)) for shear force is in range of 1.42-1.52 for column and for beam is in range of 0.97-1.07 of ground storey.

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Work I do • Validate the magnification factor• Analysis its effect ,if higher values are chosen• Taking provision for opening like door and window in upper

stories.• Make a arithmetic model for response history analysis.

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refrences

• [1] Dharmesh Vijaywargoya ,Dr Abhay Sharma and Dr.Vivek Garg, “Seismic response of a mid-rise rcc building with soft storey at ground floor”, International Journal of Science Engineering and Technology, 2(6), pp. 1065 - 1076. (2014).

• [2] Prerna Nautiyal, Saleem Akhtar and Geeta Batham, “Seismic response evaluation of rc frame building with floating column considering different soil conditions”, International Journal of Current Engineering and Technology, 4(1), pp. 132 - 138. (2014).

• [3] IS 1893 (Part I): 2002 — “Criteria for earthquake design of structures – part i: general provisions and buildings (fifth revision)”, Bureau of Indian Standards, New Delhi, pp .28

• [4] Bhagavathula Lohitha and S.V.Narsi Reddy, “Earthquake resistant design of low-rise open ground storey frame building”, International Journal of Modern Engineering Research.vol.6, pp 79-89.

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• Advance structural analysis Bhavikaati

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• thankyou