Open Access Open Access  Restricted Access Subscription or Fee Access

Safety Analysis of A Three Span Reinforced Concrete Beam

Sule S., Temple Nwofor, Matthew F.

Abstract


In this study, the safety analysis of a three- span reinforced concrete beam supporting a classroom block is carried out considering the failure of the beam in bending, shear and deflection in accordance with the provision of BS8110 (1987). The failure functions were developed based on bending, shear and deflection were solved to obtain the design points using a Matlab code. A sensitivity analysis was conducted on the design parameters to demonstrate their respective significance concerning beam safety. The findings revealed that as the load ratio and beam span increased, the safety indices exhibited a consistent decrease, affecting bending, shear, and deflection parameters accordingly. For a beam span beyond 4.5 m and a load ratio of 1.0 the safety of the beam is not guaranteed due to negative value of the safety index

Full Text:

PDF

References


Afolayan, J.O and Abubakar, I. (2003) “Reliability-Based Design Program For Reinforced

Concrete One-way Slabs in accordance with BS8110 1985” Nig.Journal Of Engineering, Vol.11,

No.2, pp. 1–6 Ahmadu Bello University Zaria

Amartey, Y. D (2008) “Reliability Evaluation of In-situ Strength of Reinforced Concrete

Members”, Page 39–40 Nigerian Journal of Engineering, Vol.14 No.1, March 2008, published by

Faculty of Engineering, Ahmadu Bello University, Zaria, Nigeria.

Biondini, F. (2003) “Probabilistic Limit States Analysis of Framed Structures” American Society

Of Civil Engineers (ACSE)Publication, Vol 2, 132–145.

Chan, H. P, Casas, J.R and Nowak, A.S (2000) “Reliability Analysis of Bridge Girders, A

Comparison of Code of Practice” 8thACSE Conference on Probabilistic Mechanics and Structural

Reliability

Christopher, E.D and Elin, T. (2012) “Reliability Analysis of a Prestressed Concrete Beam Exposed

to fire” Engineering structures Vol43:69–77

Ellingwood, B.R. (1996) “Reliability- based condition assessment and FRED for existing

structures, Structural safety;Vol.18 (2–3): 67–80

Ellingwood, A.M and Reinhold, T.A (1980), “Reliability Analysis of Steel Beam Columns”, journal

of the structure Division, ASCE, Vol 106, No ST12, 2550–2564

Ellingwood, B.R and Ang, A.H.S (1974) “Critical Analysis of Reliability Principles Relative to

Design” 1st International Conference on Application of Statistics and Probability to Soil and

Structural Engineering, University of Hong Kong

Gharaibeh, E.S, McCartney, J.S, Frangopol D.M(2001) “Reliability – Based Importance

Assessment of Structural Members”. 2001, pp1–3

Gollwitzer, S., Abdu, T. and Rackwitz, R.(1988): “First Order Reliability Method Manual, RCPGMBH, Munchen 19 West Germany.

Hosseinnezhad, A., Pourzeynali, S. and Razzaghi, J. (2007) “Application of First –Order, SecondMoment Level Reliability Analysis of Prestressed Concrete

Bridges”. MSc research. Department of Civil Engineering, Faculty of Engineering, University of

Guilan Rasht, I.R Iran.

Hsin, Y.C and Lance, M. (2004) “ReliabilityBased Design of Steel Bridges Under FatigueLoading”

Journal of Bridge Engineering, Vol. 3, 321–342.

JCSS (2001). “Probabilistic Model Code”,12th draft www.jcss.byg.dtu.dk/publication.

Jinsheng, DU and Xila, LIU(2002) “Unbonded Prestressed Concrete Structural Reliability”.

Department of Civil Engineering, Tsinghua University, Beijing 100084, China and School of Civil

Engineering and Mechanics, Shanghai Jiaotong University, Shanghai 200030, China respectively.

Kong, F.K and Evans, R.H (1999) “Reinforced and Prestressed concrete” Third edition, University

press Cambridge, Great Britain.

Melchers, R.E. (1999) “Structural Reliability Analysis And prediction” Ellisttorwoodlimited,

Chichester

Milton, E.H (1987) “Reliability-BasedDesign in Civil Engineering” McGrawHill, Inc. united states

of America.

Mosley, W.H and Bungey, J.H. (2002) “Reinforced Concrete Design”, 5th – edition, Macmillian

Press Limited, London

Moris, Y. and Ellingwood, B.R (1993), “Reliability-Based Service-life Assesment of Aging

Concrete Structures”. Journal of the Structural Engineering Vol.119 pp 286–292.

Nowak, A.S. (2004) “System Reliability Model For Bridge Structures” Bulletin Of The Polish

Academy Of Sciences, Technical Science, Vol. 54 No.4.

Nowak, A.S and Collins, K.R (2002) “Reliability of Structures” MC Graw Hill, Boston.

Ocholi, A. (2000) “Reliability Based Design of a Steel Roof Truss System” M.Sc. Thesis Submitted

to Postgraduate School, Ahmadu Bello University Zaria.

Prabir, C., Sekhar, K. C. and Murali, K.M(2007) “Reliability of Prestressed Concrete Containment

Structure Against Internal Pressure” Civil & Structural Engineering Division, Atomic Energy

Regulatory Board, Mumbai, India.

Sorensen, J.D and Faber, M.H. (2002), Reliability code calibration, paper for the joint committee

on structural.

Thoft-Christensen P. and Baker, M.J. (1982) “ Structural Reliability Theory and its Application”.

Berlin Springer-Verlag

Vedeiraine (1994) “illustrated structural applications of universal first order reliability method”.

NASA Technical paper 3501

Zimmerman, J.J, Corotis R. Band Ellis, J.H (1992) “Structural system reliability considerations

with frame instability. Engineering Strut 1992;14(6): 371–378.


Refbacks

  • There are currently no refbacks.