TUB 2765 SHS Welded Joints - Tata Steel

35 Design of SHS welded joints
6. Design examples
The example given here is for a simply supported, K-braced girder and is designed firstly for RHS and
secondly for CHS members. For each joint being checked the joint parameters and the joint capacities
for all possible failure modes must be calculated. The lowest capacity is then taken as the joint's actual
capacity.
Note - this process can be undertaken quickly by the use of appropriate computer design software, for example [5].
6.1 Girder layout and member loads
Girder basic details
Span 25m
Number of panels 10
Bracing angles 55°
Depth 1.785m
Span / depth ratio 14
External loading 100kN factored load per panel point excluding ends
Material Celsius ® 275
The structural analysis has been based on the assumption that all member centre lines node, bracings
are pinned and chords are continuous. The girder is symmetrical about its centre, so only half is shown
here. The girder and member load details are shown in figures 29 and 30
5 4 3 2
1 2 3 4
20 21 22 23 24 25 26 27
Figure 29: Girder layout, member and node numbering
450
Figure 30: Applied member factored loads
5
28 29
6 11 7 12 8 13 9 14 10 15
1, 2 .... etc member numbers : 1 , 2 .... etc joint numbers
100 100 100 100 100
-314 -872 -1290 -1569 -1709
+548 +427 +304 +183 +61
628 1115 1465
All loads in kN
1
C
11
C
C
1674 1744
C