A NOTE ON AN ASPECT OF THE VARIABILITY OF DEFLECTIONS

THE ONLY PROPERTY OF THE CONCRETE NORMALLY KNOWN TO THE DESIGNER AT THE CALCULATION STAGE OF A DESIGN IS ITS SPECIFIED CHARACTERISTIC STRENGTH. THIS PAPER CONSIDERS THE CONSEQUENCE OF THIS FACT FOR THE RELIABILITY OF DEFLECTION CALCULATIONS BY INVESTIGATING THE UNCERTAINTIES INTRODUCED BY THE ESSENTIAL ASSUMPTION THAT THERE ARE UNIQUE RELATIONSHIPS BETWEEN CUBE STRENGTH AND MODULUS OF ELASTICITY AND BETWEEN CUBE STRENGTH AND TENSILE STRENGTH. IT IS SHOWN THAT, FOR MEMBERS HAVING LOW PERCENTAGES OF REINFORCEMENT, THE LIKELY RANGE OF DIFFERENCES ATTRIBUTABLE TO THIS ASSUMPTION CAN BE VERY LARGE UNDER SERVICE LOADS. SOME PHILOSOPHICAL QUESTIONS CONCERNING THE RELATIONSHIP BETWEEN 'RESEARCH' AND 'DESIGN' FORMULAE ARE ALSO RAISED.(A)

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00249831
• Corporate Authors:

  An Foras Forbartha

  St Martin's House, Waterloo Road
  Dublin 4,   Ireland 

  Cement and Concrete Association

  Wexham Spring
  Slough SL3 6PL, Buckinghamshire,   England 
• Authors:
  • Beeby, A W
• Publication Date: 1974-9

Language

• English

Media Info

• Features: Figures; References;
• Pagination: p. 161-168
• Serial:
  • MAGAZINE OF CONCRETE RESEARCH
  • Volume: 26
  • Issue Number: 88
  • Publisher: Thomas Telford Limited
  • ISSN: 0024-9831

Subject/Index Terms

• TRT Terms: Calculation; Concrete; Cubes; Deflection; Mix design; Modulus of elasticity; Strength of materials; Tensile strength; Tension; Variables
• Uncontrolled Terms: Computation
• ITRD Terms: 6464: Calculation; 4755: Concrete; 6457: Cube; 5586: Deflection; 4714: Mix design; 5919: Modulus of elasticity; 5544: Strength (mater); 5502: Tension; 9086: Variability
• Subject Areas: Highways; Materials; Planning and Forecasting; I32: Concrete; I72: Traffic and Transport Planning;

Filing Info

• Accession Number: 00083368
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Files: ITRD, TRIS
• Created Date: May 1 2003 12:00AM