PSI - Issue 44

Andrea Dall’Asta et al. / Procedia Structural Integrity 44 (2023) 862–869 A. Dall’Asta et al./ Structural Integrity Procedia 00 (2022) 000–000

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Table 1. Tests sequence.

Day

Test

Starting time Duration [min] Max force [kN]

Max displacement [mm]

3 rd July 2020

S1 D1 S2 D2 D3 D4 S3

12:22 13:47 16:36 12:24 13:36 15:56 17:07

6

518 2729 3206 1756 3122 1786 3834

0.0

16 21

177.3 232.4 109.4 226.9 121.8 284.6

6 th July 2020

8

18

9

25

Table 2. Environmental conditions during tests.

Day

Time

East corner isolation level

South corner isolation level

East brace at level 0

T (°C)

RH (%)

T (°C)

RH (%)

T (°C)

RH (%)

3 rd July 2020 10:00

22.1 22.5 23.5 23.5 24.3 24.7 23.0 22.2 19.9 19.7 20.2 20.7 21.0 21.3 20.9 21.0

69.2 64.8 57.8 57.7 59.0 57.1 67.5 67.6 63.6 66.2 66.0 64.9 63.6 62.2 62.6 60.6

23.2 23.7 23.4 23.7 24.3 23.9 22.9 22.6 21.9 22.8 22.8

76.1 68.8 70.6 65.7 66.4 77.2 71.2 74.3 64.5 57.9 57.6

26.3 27.5 28.4 29.0 29.6 29.9 31.0 24.9 23.7 24.2 25.6 26.7 27.5 28.3 29.0 29.5

46.5 41.7 33.6 35.6 33.4 34.7 31.8 47.0 43.7 43.9 43.0 36.9 35.7 32.1 29.6 29.2

11:00 12:00 13:00 14:00 15:00 16:00 17:00 11:00 12:00 13:00 14:00 15:00 16:00 17:00

6 th July 2020 10:00

- - - - -

- - - - -

The displacement time-histories during both dynamic and static tests are reported in Fig.4. In the quasi-static tests, the time was set to zero when the displacement decrement started. In the dynamic tests, the time was set to zero when the load cells recorded the drop of the applied horizontal force due to collapse of the fuse. The transducers monitoring the horizontal displacements in the testing direction gave the same synchronized readings during both the push and release phases, thus, indicating absence of rotations with respect to the vertical axis. The transducer monitoring the displacement perpendicular to the testing direction confirmed that no transverse movement was activated.

Fig. 4 Displacement time-history curves of the dynamic and static tests.