Shear Design of Prestressed Concrete: A Unified Approach

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

“…In the case of T sections, the shear stresses concentrate in the upper part and around the web, but they extend also to a certain portion of the flanges, in consistency with the experimentally observed behavior. 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].…”

Shear-flexural strength mechanical model for the design and assessment of reinforced concrete beams

“…Furthermore, these models allow, after some simplifications, deriving simple equations which are suitable for codes provisions or for their use in daily engineering practice. Among them are the 'Tooth model' developed by (Reineck, 1991), simplified models based on the Modified Compression Field Theory (Bentz, 2010;Féderation International du Beton, 2013), the Critical Shear Crack theory (Muttoni, 2008;Muttoni & Ruiz, 2008), the Splitting Test Analogy (Desai, 2004;Zararis, 2003;Zararis & Papadakis, 2001) and the theories based on the shear resisted by the uncracked compression chord (Choi, Park, & Wight, 2007;Khuntia & Stojadinovic, 2001;Kotsovos, Bobrowski, & Eibl, 1987;Park, Choi, & Wight, 2006;Park, Kang, & Choi, 2013;Ruddle, Rankin, & Long, 1999;Tureyen & Frosch, 2003;Tureyen, Wolf, & Frosch, 2006;Wolf & Frosch, 2007;Zanuy, Albajar, & Gallego, 2011). On the other hand, methods based entirely on the theory of plasticity have also been applied with good results (Marti, 1999;Nielsen & Hoang, 1999;Recupero, D'Aveni, & Ghersi, 2003;Spinella, Colajanni, & Recupero, 2010).…”

Simplified nonlinear analysis to compute neutral axis depth in prestressed concrete rectangular beams

“…Furthermore, the resulting neutral axis location found from the analytical or the simplified procedure is in good agreement with the numerically obtained position of the neutral axis considering the huge time saving. Accordingly, the present paper provides a quick practical way to compute the neutral axis depth for the shear strength contribution of concrete in prestressed members based on the recent advances in this subject [1][2][3]. …”

“…Recent research in concrete analysis and design under shear has revealed that the shear capacity correlates well with the neutral axis depth [1][2][3]. Consequently, to calculate the shear strength contributed by concrete, the neutral axis depth must be determined.…”