Shear-flexural strength mechanical model for the design and assessment of reinforced concrete beams subjected to point or distributed loads

Abstract

Abstract:A mechanical model recently developed for the shear strength of slender reinforced concrete beams with and without shear reinforcement is presented and extended to elements with uniformly distributed loads, specially focusing on practical design and assessment in this paper. The shear strength is considered to be the sum of the shear transferred by the concrete compression chord, along the crack, due to residual tensile

Predicting the shear–flexural strength of slender reinforced concrete T and I shaped beams

“…[2][3][4][5][6] may be found elsewhere [22,23]. Shear resistance of cracked concrete in the web (Eq .…”

“…The concrete chord contribution V c can be similarly derived by including the distributed load in the equilibrium equations as Marí et al [23] deduced. The reaction should be calculated by adding to the predicted ultimate shear at the critical section, the portion of distributed load in the support neighbourhood who runs directly to the support.…”

“…This fact has been also recognized by different researchers [5,7,[14][15][16][17][18][19] which consider that part of the flange width contributes to the shear strength. In previous works, a shear-flexural strength mechanical model for the design and assessment of reinforced concrete beams was developed by the authors and experimentally verified with large databases of shear tests of steel and FRP reinforced concrete beams with rectangular cross section [21][22][23]. The model is based on the assumption that, at ULS, shear is resisted mainly by the un-cracked concrete chord, by residual tensile stresses in the closest part of the critical crack, by the longitudinal reinforcement (dowel action) if stirrups are provided and by the stirrups.…”

Implementación TIC en la docencia universitaria: estudio de los esfuerzos en vigas = Implementing ITC in higher education: study of effort on beams

“…El comportamiento de las vigas ha sido objeto de múltiples y diversos estudios [5][6][7][8][9], desde la teoría de Vlasov [9], aplicable a vigas de pared delgada en materiales isótropos, se han realizado numerosas investigaciones ampliando la teoría de Vlasov a laminados compuestos sin tener en cuenta las deformaciones transversales en sus análisis [10], desarrollando expresiones simples para el análisis a flexión, torsión y alabeo de http://polired.upm.es/index.php/abe | Cod. 0008 | Enero -Abril 2017 | Vol.…”

“…Nº 1 | pp. 37/46 | | 39 | vigas en compuestos [6][7][8][9][10][11][12], incluyendo las deformaciones tangenciales por flexión y torsión en la cinemática [13].…”