PSI - Issue 44

Annalisa Napoli et al. / Procedia Structural Integrity 44 (2023) 2182–2189 Annalisa Napoli, Roberto Realfonzo / Structural Integrity Procedia 00 (2022) 000–000

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Table 1. Additional tests to the database published in Napoli and Realfonzo (2022).

Strengthening

Specimens

Results

Matrix’s properties

Fabric mesh’s properties

Jacket n f L b

Source

B = H L k h k v f mc / f mc FM [mm] [mm] [mm] [MPa] [MPa] [GPa] [mm] [g/m 2 ] [MPa] [GPa] [%] [mm] [-] [mm] [MPa] [-] [-] [MPa] r c f mat,c f mat,b E mat t mat  f f f,u E f  f,u t f f m0

Dataset ID

PBO-FRCM system Aiello et al. (2020)

C-D-P-1L C-D-P-2L C-D-P-3L

6 9

1 - 2 - 3 -

0.53 0.49 1.34 DB 0.53 0.49 1.43 DB 0.53 0.49 1.93 DB 0.61 1.00 1.21 S/DB 0.61 1.00 1.10 S/DB 0.61 1.00 1.33 S/DB 0.33 1.00 1.23 DB 0.33 1.00 1.37 DB 0.33 1.00 1.27 DB 0.33 1.00 1.18 DB/JF 0.43 1.00 1.29 DB 0.43 1.00 1.37 DB 0.43 1.00 1.33 DB 0.43 1.00 1.36 DB 0.68 1.00 1.33 DB 0.68 1.00 1.52 DB/JF 0.68 1.00 1.40 DB 0.68 1.00 1.33 DB 0.43 1.00 1.45 DB 0.43 1.00 1.50 DB 0.43 1.00 1.37 DB 0.43 1.00 1.37 DB

250 770 20

36.16 5.50 -

-

3400 211.4 2.59 0.046

5.19

12 10 10 10

LR-C1 LR-C2 LR-C3

Alecci et al. (2021)

250 500 30

0.79 0.64 -

-

3300 270.0 1.49 0.014 1 300 8.52

S-FRCM system

C-2-6-0-1 C-2-6-0-2 C-2-6-0-3 C-2-6-0-4 C-2-6-9-1 C-2-6-9-2 C-2-6-9-3 C-2-6-9-4 C-2-6-38-1 C-2-6-38-2 C-2-6-38-3 C-2-6-38-4 C-2-12-9-1 C-2-12-9-2 C-2-12-9-3 C-2-12-9-4

1 240 1 240 1 240 1 240 1 200 1 200 1 200 1 200 1 200 1 200 1 200 1 200 1 200 1 200 1 200 1 200

250 720 0

47.10 4.40 -

10 670 2900 205.0 2.00 0.084

7.38

250 720 9.5 47.10 4.40 -

10 670 2900 205.0 2.00 0.084

7.38

Carloni et al. (2019)

250 720 38.1 47.10 4.40 -

10 670 2900 205.0 2.00 0.084

7.38

250 720 9.5 47.10 4.40 -

10 1200 2900 205.0 2.00 0.169

7.38

The pie chart in Figure 1a shows the current distribution of specimens in the database per FRCM system. Regardless of the shape of the cross-section, the collected specimens are rather equally distributed among the examined FRCM systems, except for the PBO-FRCM for which only 20 specimens are available. Specifically, the database includes: • 51 specimens confined with B-FRCM (31 prismatic and 20 cylindrical); • 62 specimens confined with C-FRCM (only prismatic); • 59 specimens confined with G-FRCM (51 prismatic and 8 cylindrical); All specimens were continuously confined except for the three tests by Aiello et al. (2020) where a discontinuous PBO-FRCM wrapping was investigated (see tests ID “C-D-P-1L”, “C-D-P-2L”, and “C-D-P-3L” in Table 1). It is worth noting that, in order to perform the analyses presented in the following sections, the information reported in the new database was, re-organized in 116 homogeneous datasets, of which 108 referred to prismatic specimens and 8 to cylindrical ones. The organization in datasets is consistent with the methodology followed in previous investigations (Napoli and Realfonzo 2021, Napoli and Realfonzo 2022) which is in turn based on the “Design by testing” approach recommended by the Annex D of Eurocode 0 (CEN 2002). In particular, each dataset is representative of a group of N experimental tests performed by same researchers and characterized by uniformity in terms of: • material and masonry arrangement; • specimen size ( B , H , L and r c for square/rectangular columns; D and L for circular columns); • geometry, typology of FRCM system and confinement layout (i.e.,  f , t f , n f , and L b ); • mechanical properties of the fiber mesh (i.e., f f,u , E f and  f,u ); • thickness ( t mat ) and mechanical properties of the FRCM inorganic matrix (i.e., f mat,c , f mat,b and E mat ); • compressive strength of the unconfined masonry, f m0. The experimental results attributed to each dataset represent, therefore, the average values obtained for the collected N tests; for more details, reference to Napoli and Realfonzo (2022) can be made. By re-organizing the database, some datasets were purposely excluded from the analyses due to some issues found • 20 specimens confined with PBO-FRCM (only prismatic); • 69 specimens confined with S-FRCM (only prismatic).