APPRAISAL OF RECIPROCAL LOAD METHOD FOR REINFORCED CONCRETE COLUMNS OF NORMAL AND HIGH STRENGTH CONCRETE

Use of the reciprocal load method (RLM) for evaluating capacity of RC columns under axial load and biaxial bending is suggested in concrete design handbooks and in commentaries to the design codes. The RLM interpolates such a capacity from the interaction diagrams obtained for the uniaxial bending cases. The adequacy of the RLM for short reinforced concrete columns of normal strength concrete has been verified in the literature. It is noted that validity of this method for RC columns of high strength concrete is rarely discussed, and that the characteristic of the stress--strain relation of normal strength concrete differs from that of high strength concrete. A numerical assessment of the adequacy of the RLM for short RC columns of normal and high strength concrete is presented. The possibility of using the RLM for slender RC concrete columns is also examined. The assessment was conducted by comparing predicted capacities obtained using the RLM and those obtained by solving several nonlinear coupled governing equations established based on statics and considering the nonlinear stress--strain relations of concrete and steel.

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  • English

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  • Accession Number: 00934120
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Nov 8 2002 12:00AM