Issue 58

M. Emara et al, Frattura ed Integrità Strutturale, 58 (2021) 86-104; DOI: 10.3221/IGF-ESIS.58.07

Stiffeners of galvanized sheets

(a) Before concrete casting

(b) After concrete casting

Figure 15: The used formworks in the current test.

Figure 16: The prepared wooded circular bases.

Figure 17: Column samples after drying.

Loading configuration and test setup Fig. 18 shows the loading configuration and test setup. The hydraulic testing machine with a capacity of 2000 kN was utilized for testing the desired column samples under the effect of centric loading. To guarantee the precision of the results, the machine was calibrated before testing. Stiff steel plates were installed below and over the column sample. Steel collar was coiled and bolted using high strength bolts around supporting and loading ends of the sample for adequate confinement; Fig. 19. The centric load at the failure was promptly determined using a load cell at the testing machine. To monitor the

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