PHYSICAL-ENGINEERING MODEL OF REINFORCED CONCRETE FRAMES IN COMPRESSION
A calculation of the complementary moments due to second-order effects and the analysis of the stability of reinforced concrete framed structures can be conceived as follows. With the aid of a computer a very large number of D-N-X diagrams can be produced on the basis of the standard specified stress-strain diagrams for concrete and steel. A framed structure is then analysed with an available program which takes account of second-order effects. The flexural stiffnesses E1 to be adopted are estimated and corrected with reference to the M-N-X diagrams calculated once before and held in store for the purpose. The present paper discusses the drawbacks of this approach and proposes a method of analysis which can be fitted into existing programs for framed structures and dispenses with the large number of stored M-N-X diagrams. It is shown that direct use can be made of the stress-strain diagrams. The results are just as reliable as those obtained by the procedure utilising the M-N-K diagrams. The method can be applied to total frames and single members in compression as well.
The Hague, Netherlands
- Blaauwendraad, J
- Publication Date: 1973
- Features: Figures; References;
- Pagination: 32 p.
- TRT Terms: Compression; Deformation curve; Framed structures; Reinforced concrete; Stability analysis; Stiffness; Surveys
- Old TRIS Terms: Second order surveys; Stiffness methods (Structural)
- ITRD Terms: 6464: Calculation; 5532: Compression; 5595: Deformation; 8673: Digital computer; 132: Forecast; 3322: Frame; 6494: Matrix; 4794: Reinforced concrete; 5930: Stability; 5931: Stiffness; 5575: Stress (in material)
- Subject Areas: Bridges and other structures; Highways;
- Accession Number: 00265578
- Record Type: Publication
- Source Agency: Transport and Road Research Laboratory (TRRL)
- Report/Paper Numbers: Report 15 R&D Rpt.
- Files: ITRD, TRIS
- Created Date: May 29 1975 12:00AM