PSI - Issue 84

L. Pisani et al. / Procedia Structural Integrity 84 (2026) 1144–1150 L. Pisani et al. / Structural Integrity Procedia 00 (2026) 000–000

1149

6

Table 2: Experimental results at Ponte di Brivio

XRD measurement 1 (MPa)

XRD measurement 2 (MPa)

XRD Average measurement (MPa)

XRD Average – RS (MPa)

Wire position

2 North 3 North 4 North 5 North 6 North 7 North 8 North

615 694 646 693 572 546 779 106 831

655 664 706 677 539 513 833

635 679 676 685 556 530 806 101 832

534 578 575 584 455 429 705

BROKEN ( RS )

95

1 South

833

731

4. Preliminary experiments on wires and strands by MBN A series of experimental MBN measurements has been done at Politecnico di Torino on a seven wire 15.5 mm strand. By varying applied stress an almost linear correlations have been observed between stress and MBN INT measured value. Figure 6 (left) plots one of these experimental results with increasing and then decreasing stress. From this data a linear regression has been obtained, Fig. 6 (right).

Fig 6: MBN readings by varying stress level (left), linear data regression (right).

Table 3: Twisted strand 15 mm Sugar Silo Porto Viro. XRD / MBN comparison Level Strand Wire position XRD MBN

MBN (MPa)

MBN-XRD

(MPa)

(INT) 3917 3840 3839 3454 4800 4802 4875 4944 4924 4222 4320 4302 4288

(MPa)

H H H L L H H L L H H H H

a

644 645 645 682 522 615 600 556 556 624 645 526 584

665 673 674 716 568 636 633 552 554 631 621 623 624

-21 -28 -29 -34 -46 -21 -33

b reading 1 b reading 2

A

a b a b

B

a reading 1 a reading 2

4 2

a b

-7

24

C

c reading 1 c reading 2

-97 -40