PSI - Issue 19

Mladen Lukić / Procedia Structural Integrity 19 (2019) 655–664 Author name / Structural Integrity Procedia 00 (2019) 000–000

661

7

Detail category Constructional detail

Description

Requirements

Continuous longitudinal welds: 1) Automatic or fully mechanized butt welds carried

Details 1) and 2): No stop/start position is permitted except when the repair is performed by a specialist and inspection is carried out to verify the proper execution of the repair.

out from both sides. 2) Automatic or fully

125

mechanized fillet welds. Cover plate ends to be checked using detail 6) or 7) in Erreur ! Source du renvoi introuvable. . 3) Automatic or fully mechanized fillet or butt weld carried out from both sides but containing stop/start positions. 4) Automatic or fully mechanized butt welds made from one side only, with a continuous backing bar, but without stop/start positions.

112

4) When this detail contains stop/start positions category 100 to be used.

Fig. 2. Detail of the table on Welded built-up sections (Table 8.2) in EN 1993-1-9 (2007)

Detail category Constructional detail

Symbol

Description

Requirements

①

Automatic or fully mechanized butt welds, welded from both sides, without stop-starts as aforementioned, but with stop-starts

125

112

②

Automatic or fully mechanized fillet welds, without stop-starts

For cover plates two parallel single fillet welds are necessary. NOTE Cover plate ends should be checked using detail ⑥ or ⑦ in Table 8.5

125

as aforementioned, but with stop-starts

112

Fig. 3. Detail of the table on Welded built-up sections (Table 9.3) in prEN 1993-1-9 (2019)

It is obvious that the new proposal offers a much user-friendlier approach to the understanding of the constructional detail, on the forces and therefore stresses to be taken into account, on the type of the weld and on the requirements exceeding those already given for the fabrication of such a constructional detail within EN 1090-2 (2018). The latter topic is treated in section 2.2.9 in more details. On the other hand, although the tables are expected to receive more clarity and better description, any radical modification of detail categories (unless well documented and justified) or fatigue strength (“S-N”) curves seems