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| Limit Analysis for Reinforced Concrete Beams with Rectangular Cross-Section under Bending and Torsion
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| CHEN Xi-a, LIU Xi-La-b |
| (a.Department of Solid Mechanics; b.Department of Civil Engineering, Shanghai Jiaotong University, Shanghai 200240, China) |
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Abstract A new limit analysis method for rectangular reinforced concrete (RC) beams subjected to combined bending and torsion was given. Based on the warped failure surface determined by external loads, with an assumed reasonable stress distribution, a new strength equation on torsion-bending interaction was derived from the equilibrium conditions, which should be a lower bound in limit analysis. The new equation is simple and conceptually clear. Comparing with the existing test results it is shown that the new method is in good agreement with the existing test results, and may also be used in more complex external loadings case.
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Received: 06 November 2011
Published: 30 October 2012
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