Torsion, shear and bending in reinforced concrete beams.
Tests on four concrete beams with transverse-longitudinal steel ratio varying from zero to 1.86 are reported. The strength of the rectangular reinforced concrete beams, all of which fail due to direct shear and torsion, agree favourably with the tensile strength of concrete determined from indirect...
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| Format: | Others |
| Language: | en |
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McGill University
1962
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| Online Access: | http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=113758 |
| Summary: | Tests on four concrete beams with transverse-longitudinal steel ratio varying from zero to 1.86 are reported. The strength of the rectangular reinforced concrete beams, all of which fail due to direct shear and torsion, agree favourably with the tensile strength of concrete determined from indirect tension tests. Initial cracks occurred in all the beams at a load corresponding to a combined shear stress of 346 psi in an unreinforced section under combined bending, shear and torsion. Results indicate that the shear reinforcement ceases to be fully effective as the Pt/p+p' ratio approaches and exceeds unity. Moreover the concept of a transition from elastic to plastic states of stress is proved by the results. Expressions have been derived for the stresses and unit angle of rotation for the central section of the beam remaining plane. The results of the limited number of tests appear to agree well with the modified theory. |
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