PSI - Issue 10

N. Nikoloutsopoulos et al. / Procedia Structural Integrity 10 (2018) 141–147 N. Nikoloutsopoulos et al. / Structural Integrity Procedia 00 (2018) 000 – 000

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Table 1. Strengthening Techniques. Code

Strengthening Technique groups

Code

Strengthening Techniques

Ref

Without strengthening

-

-

A.1 A.2 A.3 B.1 B.2 B.3 B.4 C.1 C.2 C.3 D.1 D.2

Four-sided single strip Four- sided double strips

Four-sided strips or four-sided continuous jacket (Full Wrap)

A

Four-sided single continuous jacket

Three-sided single strip Three-sided double strips Three-sided single jacket Three-sided double jacket

Three-sided strips or three-sided continuous jacket (U-Shape wrap)

B

Three-sided single strip with rope anchorage Three-sided double strips with rope anchorage Three-sided single jacket with rope anchorage

Three-sided strips & three-sided continuous jacket with rope anchorage

C

Single rope in perimeter notch at 90 o Double rope in perimeter notch at 90 o

Rope in perimeter notch at 90 o

D

Single rope in two sided notch at 90 o (3 positions) Double rope in two sided notch at 90 o (3 positions) Single rope in two sided notch at 90 o (2 positions) Double rope in two sided notch at 90 o (2 positions)

E.1.a E.2.a E.1.b E.2.b

Rope in two sided notch at 90 o

E

Single rope in two sided notch at 45 o Double rope in two sided notch at 45 o

F.1 F.2

Rope in two sided notch at 45 o

F

(a) (b) Fig. 1. (a) Reference beam before and after the bending test; (b) Strengthening technique C.2 before and after the bending test. Fig.2a shows the beam with strengthening technique A.3 before and after the two-point bending test and Fig.2b shows the strengthening technique B.2 before and after the two-point bending test. Fig.3a shows the beam with strengthening technique E.1.b before and after the two-point bending test and Fig.3b shows the strengthening technique F.1 before and after the two-point bending test 3. Results and discussion In order not to fail in shear, the strengthening contribution should be higher than 30.2 kN. This limit, which is indicated in Figs.2, 3 and 4 with a straight line, was calculated according to Eurocode 2 (EN 1992-1-1, EC2) using the reference beam rest results.