Hinges in SAR

SOFiSTiK
1

I am trying to introduce hinges along some SLN inside two SAR in sofimeshc
I define the SAR using SARB with points and then i use SARB again to define inner boundaries with SLN and hinges using FIX.
The problem is this works only in the second SAR i define but not in the first. However the syntax is the same in both.
Can somebody tell what i am doing wrong?
Thanks

PROG AQUA URS:1
HEAD
NORM EN 199x-200x-bridge
UNIT 0 $ Units in m
CONC 1 C 30
STEE 2 S 500
STEE 10 S 275
PROF 1 TYPE IPE 600 MNO 10
PROF 2 TYPE IPE 300 MNO 10
END

+prog sofimshc urs:6
head
unit 5 ; syst spac GDIV 10000
CTRL MESH 3 ; CTRL HMIN 0.3 ; CTRL TOLG 0.001

echo full full
$ geometry points
spt no x y
1 -8 -8
2 8 -8
3 8 8
4 -8 8
5 8 0.025
6 8+7.075 0.025
7 8+7.075 8

spt (11 16 1) x (-6.25 2.50) y -8.0
spt (21 26 1) x (-6.25 2.50) y -5.0 fix pp
spt (31 36 1) x (-6.25 2.50) y 0.0 fix pp
spt (41 46 1) x (-6.25 2.50) y 5.0 fix pp
spt (51 56 1) x (-6.25 2.50) y 8.0

spt (17 18 1) x (10.075+0.5 2.0) y 0.025
spt (27 28 1) x (10.075+0.5 2.0) y 2.025+0.25 fix pp
spt (37 38 1) x (10.075+0.5 2.0) y 6.025-0.25 fix pp
spt (47 48 1) x (10.075+0.5 2.0) y 8.000

spt no x y
61 -8 -6.25
62 -3.75 -6.25
63 3.75 -6.25
64 8 -6.25
71 -8 -1.25
72 -3.75 -1.25
73 3.75 -1.25
74 8 -1.25
81 -8 1.25
82 -3.75 1.25
83 3.75 1.25
84 15.075 1.25
91 -8 6.25
92 -3.75 6.25
93 3.75 6.25
94 15.075 6.25
95 3.75 3.75
96 15.075 3.75

$ structural lines
sln (11 16 1) npa (11 1) npe (51 1) sno 1 grp 1
sln (17 18 1) npa (17 1) npe (47 1) sno 1 grp 1
sln (61 63 2) npa (61 2) (62 2) sno 2 grp 2
sln (71 73 2) npa (71 2) (72 2) sno 2 grp 2
sln (81 83 2) npa (81 2) (82 2) sno 2 grp 2
sln (91 93 2) npa (91 2) (92 2) sno 2 grp 2
sln 95 npa 95 96 sno 2 grp 2
sln no npa npe sno=2 grp=2
1 1 2
2 2 5
3 5 6
4 6 7
5 7 4
6 4 1
7 3 5
$
loop#j 3
loop#i 3
sln 21+#i+10*#j ; slnb xm -5+5*#i ym -5+5*#j r 1.0 nz 1.0
endloop
endloop
$contornos pilotes 0.8
loop#j 2
sln 27+10*#j ; slnb xm 11.075+0.5 ym 2.025+0.25+3.5*#j r 0.4 nz 1.0
endloop

$ first SAR where internal boundary with hinges does not work
sar 1 mno 1 t 230[mm] tx 300[mm] ty 200[mm] txy 200[mm] td 200[mm] grp 3
sarb na ne type=out
1 2
2 3
3 4
4 1
sarb type in nl 61,63,71,73,81,83,91,93,95 fix mx $ definition of the hinge

$ second SAR where the hinges work ok
sar 2 mno 1 t 230[mm] tx 300[mm] ty 200[mm] txy 200[mm] td 200[mm] grp 3
sarb na ne
5 6
6 7
7 3
3 5
sarb type in nl 61,63,71,73,81,83,91,93,95 fix mx

$ some voids
sar void
sarb nl (21 23 1)
sarb nl (31 33 1)
sarb nl (41 43 1)
sarb nl (27 37 10)

end

2

Hi Pablo, hinge conditions like “FIX MX” can currently only be applied to outer boundaries of an structural area. In your case it was a coincidence that the input for SAR works, because SOFiMSHC detected that the SLNs for the SARB IN where cutting the whole area and therefore created several SARs out of it. As you can see in the following picture, the SARs have being created automatically. For that “outer” boundaries of the created SARs, the hinge conditions are working as expected - but as mentioned by coincidence.

pic1
pic11052×775 19.5 KB

However, if you want to achieve the same for your SAR 1, you need to split the SAR 1 into several areas, so that the desired SLNs are “outer” boundaries of them.

I hope this explanation is clear.

Cheers

3

Thank you very much. This issue was making me crazy.
Following your guidance i splited the SAR 1 into three SAR where the SLN cut the whole area and it worked.
Please could the staff people add this explanation to the SOFIMESHC manual to help users with their mental health?
Thanks again.