Shear strengthening

Shear strengthening is deemed extremely interesting when strengthening r.c. beams for structural members where the applied factored shear, possibly calculated according to the resistance hierarchy criteria, is greater than the corresponding shear capacity, a strengthening with composite materials can be possible (Fig. 5.5). [Pg.72]

Shear strengthening control is reqnired only at the nltimate limit state. The following are the main technologies for shear strengthening with the related shear capacity. [Pg.72]

Shear strengthening of an r.c. beam can be carried out by applying one or more layers of sheet bonded to the external surface of the member to be strengthened. The reinforcement strips can be applied in a continuous or discontinuous mode and with a variable inclination angle (Fig. 5.6). [Pg.72]

Strengthening can be applied around the section with a U-wrapping or be completely wrapped, as suggested in Fig. 5.7. [Pg.73]

Differently from what was described in the technical document of the CNR, the CSLLPP guidelines do not allow for the installation of a shear strengthening with a complete side bonding of the reinforcements, due to the high risk of debonding. [Pg.73]

Key words FRP bars, externally strengthening, FRP profiles, confinement, flexural strengthening, shear strengthening. [Pg.69]

In the following sections, the design of flexural and shear strengthening as well as confinement are described. Note that these design methods are still under development and that all equations in these sections are presented without safety factors. In an actual design, safety factors must be applied. [Pg.94]

Fibre reinforced polymer (FRP) composite materials for shear strengthening... [Pg.101]

Figures 4.17 and 4.18 show examples of applications of FRP for shear strengthening. Figure 4.19 shows schematically a selection of some...

Some possible shear strengthening principles using FRP. [Pg.102]

For shear strengthening, fabrics that are applied on the entire side of the webs, Fig. 4.18, or in the form of sheets with certain spacings, can be used. Prefabricated CFRP L-shaped strips, Figs 4.10 and 4.17, are also an alternative. [Pg.102]

Usually, for shear design the well-known classical truss model is used. The shear strengthening design also requires knowledge and understanding of the cmcial failure modes of the externally bonded shear reinforcement (EBSR). [Pg.102]

Czaderski, C. (2002). Shear strengthening with prefabricated CFRP L-shaped plates. First fib Congress, Osaka, Japan. [Pg.124]

Czaderski, C. and M. Motavalli (2004). Fatigue behaviour of CFRP F-shaped plates for shear strengthening of RC T-beams. Composites Part B Engineering 35(4) pp. 279-290. [Pg.124]

TTiantafillou, T. C. (1998). Shear strengthening of reinforced concrete beams using epoxy-bonded FRP composites. ACI Structural Journal 95(2) pp. 107-115. [Pg.128]

Gergely I, Pantelides CP, Reaveley LD (2000) Shear strengthening of RC T-joints using CERP composites. ASCE J Compos Constr 4(2) 56-64... [Pg.259]

Fig. 5.7 Disposition of shear strengthening around the section (CSLLPP guidelines)...

The value of the design strength of shear strengthened members can be computed... [Pg.74]

Fig. 5.18 Shear strengthening with U-shaped configuration of the beam of a corner joint (a) joint with two emerging beams (b) joint with an emerging joint and not emerging beam (ReLUlS guidelines—Civil Protection)...

Shear failures a shear strengthening of the failure members showing this problem is applied... [Pg.91]

Transfer of tensile stresses within single structural members or between adjoining elements (flexural, shear strengthening, etc.)... [Pg.96]

Retrofit column wrapping Resin spraying up on chopped fibres Flexural or shear strengthening... [Pg.81]

Sika (2001), Shear Strengthening Sika CarboDur Composite Systems, company brochure. [Pg.250]

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