SOFiSTiK Forum

Hello, everybody,

I want to simulate the behavior of reinforced concrete structures with SOFISTIK. For perfect bond between concrete and reinforcement, the same nodes should be shared between concrete and reinforcement. Can somebody help me how to couple concrete & reinforment nodes automatically with sofistik?

I tried to use "fix knot PP BGRP", but I always got an error information.

The following is my input file:



#define a = 0.200
#define b = 0.200
#define h_c = 0.900
#define c_c = 0.025


+PROG SOFIMSHA urs:4
kopf
syst raum gdiv 100000

knot Nr X Y Z
$ concrete element
1 0 $(b)/2 -$(h_c)/2
3 $(a)/2 $(b)/2 -$(h_c)/2
5 $(a)/2 0 -$(h_c)/2
6 $(a)/2-$(c_c) 0 -$(h_c)/2
7 0 0 -$(h_c)/2
8 0 $(b)/2-$(c_c) -$(h_c)/2
9 $(a)/2-$(c_c) $(b)/2-$(c_c) -$(h_c)/2



31 0 $(b)/2 $(h_c)/2
33 $(a)/2 $(b)/2 $(h_c)/2
35 $(a)/2 0 $(h_c)/2
37 0 0 $(h_c)/2
39 $(a)/2-$(c_c) $(b)/2-$(c_c) $(h_c)/2



$concrete element
Grup 1
bric 1 1 3 5 7 31 33 35 37 mnr 2 m 1 n 1 k 1


knot 6 fix pp BGRP 1
knot 8 fix pp BGRP 1
knot 9 fix pp BGRP 1


Grup 100
$ reinforcement element
stab nr ka ke qnr
fitl 8 9 12
fitl 9 6 12



$ boundary conditions
$ column bottom surface
sbox 0.000-0.001 0.000 $(h_c)/2 $(a)/2+0.001 0.000 $(h_c)/2 0.000 0.000-0.001 $(h_c)/2 0.000 $(b)/2+0.001 $(h_c)/2 0.000 0.000 $(h_c)/2-0.001 0.000 0.000 $(h_c)/2+0.001
knot sbox fix pxpypz
sbox

$ column top surface

sbox 0.000-0.001 0.000 -$(h_c)/2 $(a)/2+0.001 0.000 -$(h_c)/2 0.000 0.000-0.001 -$(h_c)/2 0.000 $(b)/2+0.001 -$(h_c)/2 0.000 0.000 -$(h_c)/2-0.001 0.000 0.000 -$(h_c)/2+0.001
knot sbox fix pxpy
sbox

$ side surface in y diresction

sbox 0.000-0.001 0.000 0.000 $(a)/2+0.001 0.000 0.000 $(a)/4 0.000-0.001 0.000 $(a)/4 0.000+0.001 0.000 $(a)/4 0.000 -$(h_c)/2-0.001 $(a)/4 0.000 $(h_c)/2+0.001
knot sbox fix py
sbox

$ side surface in x direction

sbox 0.000-0.001 $(b)/4 0.000 0.000+0.001 $(b)/4 0.000 0.000 0.000-0.001 0.000 0.000 $(b)/2+0.001 0.000 0.000 $(b)/4 -$(h_c)/2-0.001 0.000 $(b)/4 $(h_c)/2+0.001
knot sbox fix px
sbox

ende


The error information ocuurs when I start ASE:

+++++ error no. 174 in program TFACHLAGER2_CHECK
Support displacement at node No 6 may cause problems if coupling defines a
real fixing in that direction. Inclined couplings are possible but must be checked.
For inclined couplings this error message can be switched off with CTRL WARN 174.
+++++ error no. 174 in program TFACHLAGER2_CHECK
Support displacement at node No 8 may cause problems if coupling defines a
real fixing in that direction. Inclined couplings are possible but must be checked.
For inclined couplings this error message can be switched off with CTRL WARN 174.
+++++ error no. 174 in program TFACHLAGER2_CHECK
Support displacement at node No 9 may cause problems if coupling defines a
real fixing in that direction. Inclined couplings are possible but must be checked.
For inclined couplings this error message can be switched off with CTRL WARN 174.