Use European standard in switzerland

About the development of the FEM module/workbench.

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thschrader
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Re: Use European standard in switzerland

Postby thschrader » Sat Jul 28, 2018 4:11 pm

HarryvL wrote:
Fri Jul 27, 2018 5:11 pm
thschrader wrote:
Fri Jul 27, 2018 4:20 pm
... we have to remove much more rock as expected.
(But how: explosives?)
Why not anchor in the rock rather than removing it Thomas?
Beneath the mast there is the electronics-equipment (blue cube). They want
it at street level for better maintenance. I have send a mail to the contractor.
The location is to far away from the slope, 7,5 m. That is only a narrow path. At the actual
position we get an excavation (yellow) of min 100 m^3.
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thschrader
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Re: Use European standard in switzerland

Postby thschrader » Tue Aug 14, 2018 4:10 pm

Finally I got the correct dimensions of the mast-foundation and
the concrete-housing of the electronics-components (blue cube).
There is a 5 cm gap between the mast-foundation and the concrete-housing to ensure
"static-decoupling". When I have the correct loading of the earth-pressure, lets do a FEM-run.
The steel-construction (without gratings) is a protection against falling ice/stones.
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josheeg
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Re: Use European standard in switzerland

Postby josheeg » Wed Aug 15, 2018 5:20 pm

Wow I am impressed with your use of freecad fem module. I am trying to get some assistance on it in this thread I would appreciate if anyone would take a look. :ugeek: :geek:

https://forum.freecadweb.org/viewtopic. ... ead#unread
thschrader
Posts: 1816
Joined: Sat May 20, 2017 12:06 pm
Location: Germany

Re: Use European standard in switzerland

Postby thschrader » Wed Aug 15, 2018 6:17 pm

josheeg wrote:
Wed Aug 15, 2018 5:20 pm
Wow I am impressed with your use of freecad fem module. I am trying to get some assistance on it in this thread I would appreciate if anyone would take a look. :ugeek: :geek:

https://forum.freecadweb.org/viewtopic. ... ead#unread
Your link opens the freecad-login page.
What should I do?
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bernd
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Location: Zürich, Switzerland

Re: Use European standard in switzerland

Postby bernd » Wed Aug 15, 2018 7:10 pm

thschrader wrote:
Wed Aug 15, 2018 6:17 pm
josheeg wrote:
Wed Aug 15, 2018 5:20 pm
Wow I am impressed with your use of freecad fem module. I am trying to get some assistance on it in this thread I would appreciate if anyone would take a look. :ugeek: :geek:

https://forum.freecadweb.org/viewtopic. ... ead#unread
Your link opens the freecad-login page.
What should I do?
https://forum.freecadweb.org/viewtopic. ... 58#p249258

BTW: great stuff thomas :D did you analyse the concrete wall in FreeCAD FEM ? How about the results ... how about reinforcement ?
thschrader
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Re: Use European standard in switzerland

Postby thschrader » Wed Aug 15, 2018 7:23 pm

bernd wrote:
Wed Aug 15, 2018 7:10 pm
did you analyse the concrete wall in FreeCAD FEM ? How about the results ... how about reinforcement ?
Work in progress. My boss gave me another urgent project.
I will do the FEM-calculation next week.
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bernd
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Re: Use European standard in switzerland

Postby bernd » Wed Aug 15, 2018 8:21 pm

thschrader wrote:
Wed Aug 15, 2018 7:23 pm
My boss gave me another urgent project.
:lol: happens to me to :mrgreen:
thschrader
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Re: Use European standard in switzerland

Postby thschrader » Sun Aug 19, 2018 1:52 pm

The housing is built on massive rock, in reality there
should be no earth pressure. When using a constant pressure
of 10 kN/m^2, max principal stress is 1,5 MPa. The mean
tensile strenght of concrete C25/30 is 2,6 MPa.
==> no reinforment necessary

Self weight of the housing is 36 tons, no tilting possible.
Tomorrow we will deliver our design to Swisscom, lets see...
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HarryvL
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Re: Use European standard in switzerland

Postby HarryvL » Sun Aug 19, 2018 4:36 pm

Nice project Thomas.
thschrader wrote:
Sun Aug 19, 2018 1:52 pm
... 10 kN/m^2, max principal stress is 1,5 MPa. The mean
tensile strenght of concrete C25/30 is 2,6 MPa.
If drains get plugged then water may also build up behind the wall? So taking account of some pressure makes a lot of sense in my view. Hmmm, in the worst case this could be as much as 4m=40 kN/m^2 ??
thschrader wrote:
Sun Aug 19, 2018 1:52 pm
==> no reinforment necessary
Don't you put some practical reinforcement for shrinkage etc?
thschrader
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Re: Use European standard in switzerland

Postby thschrader » Sun Aug 19, 2018 6:42 pm

HarryvL wrote:
Sun Aug 19, 2018 4:36 pm
If drains get plugged then water may also build up behind the wall? So taking account of some pressure makes a lot of sense in my view. Hmmm, in the worst case this could be as much as 4m=40 kN/m^2 ??

Don't you put some practical reinforcement for shrinkage etc?
Yes, standing water produces 40 kN/m^2 pressure at the bottom. The high wall
has an area of approx 25 m^2, which gives a horizontal force of 500 kN!
Thats too high. The scenario gets more worse when they fill liquid concrete
in the gap between rock/wall. I will talk with my colleagues about that.
Maybe we must add some horizontal anchor bars in the rock.
And we put reinforcement for shrinking.