For circular concrete members shear reinforced with hoops or spiral, confinement effects are present. In shear design models confinement is usually neglected. In this paper, it is shown how the confinement reinforcement can be utilized to develop plastic solutions for the shear capacity of circular concrete members. A lower bound solution is derived by assuming a triaxial diagonal compression stress field to develop in the shear zone. The paper demonstrates that it is possible to obtain shear strength, which exceeds the upper limit predicted by the existing plastic solutions for rectangular beams in plane stress conditions. An upper bound solution coinciding with the lower bound solution is also presented. The solutions are compared with test results containing large amount of hoops. Good agreement has been found. © 2010 Taylor & Francis Group, London.
|Title of host publication||Structures & Architecture|
|Publication status||Published - 2010|
|Event||1st International Conference on Structures & Architecture - Guimaraes, Portugal|
Duration: 21 Jul 2010 → 23 Jul 2010
Conference number: 1
|Conference||1st International Conference on Structures & Architecture|
|Period||21/07/2010 → 23/07/2010|