Issue 54

Z. H. Xiong et alii, Frattura ed Integrità Strutturale, 54 (2020) 136-152; DOI: 10.3221/IGF-ESIS.54.10

Meanwhile, the above rule applies only to the thick branch plate. If the branch plate's thickness is equal or less than the chord's, like TT5 and TT11, as shown in Fig. 11 ( τ =1), the plate’s local yielding and chord's side wall yielding govern. Another point should be clarified, when the branch plate width is near the chord width namely β ≈ 1, FM2 usually doesn’t take place; hence, the failure mechanism of CBPRH joint ( β ≈ 1) is different with the joint β ≤ 0.85. Next, with the knowledge of failure mechanism of CBPRH joint, the strength equation for CBPRH joint and the joint with PBR could be developed.

β

P u,3%

Specimen

τ

BPRH 575.0 575.0 575.0 575.0 575.0 575.0 479.2 479.2 479.2 479.2 479.2 707.7 707.7 707.7 707.7 707.7 575.0 575.0 575.0 575.0 575.0 575.0 479.2 479.2 479.2 479.2 479.2 707.7 707.7 707.7 707.7 707.7

TT1 TT2 TT3 TT4 TT5 TT6 TT7 TT8 TT9

2

0.7 0.7 0.7 0.7 0.7 0.7 0.6 0.6 0.6 0.6 0.6 0.8 0.8 0.8 0.8 0.8 0.7 0.7 0.7 0.7 0.7 0.7 0.6 0.6 0.6 0.6 0.6 0.8 0.8 0.8 0.8 0.8 β

1114.29 1056.87 947.54 942.49 878.86 800.49 810.31 770.28 737.44 697.53 1368.66 1267.27 1197.99 1126.54 1040.53 845.1 1761.9 1664.5 1545.4 1373.1 1169.5 1583.0 1492.3 1383.8 1226.5 1038.8 2038.8 1907.4 1754.2 1655.3 1310.5 884.4 P u,3%

1.75

1.5

1.25

1

0.75

2

1.75

1.5

TT10 TT11 TT12 TT13 TT14 TT15 TT16

1.25

1 2

1.75

1.5

1.25

1

Table 5: Analysis result of CBPRH joint.

Specimen

τ

BPRH

TT1P TT2P TT3P TT4P TT5P TT6P TT7P TT8P TT9P

2

1.75

1.5

1.25

1

0.75

2

1.75

1.5

TT10P TT11P TT12P TT13P TT14P TT15P TT16P

1.25

1 2

1.75

1.5

1.25

1

Table 6: Analysis result of CBPRH joint with PBR.

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