Re: Prestressed Concrete Silo
Dear Friends,
I have examined again the Eurocode EN 1990-2002 and National Annex EN 1990-A2 (for bridge design), Table A.2.4(A) shows how the combination is formed.
However i understood, load combination including prestressed force shows below;
1.35DL + 1.50LL + 1.00P
Can you tell me the combination including each thermal effect and prestressed force?
I thin it should be likte that; 1.00DL + 1.20LL + 1.20T + P (T; Thermal effet)
Best Regards ■
Prestressed Concrete Silo
Dear Friends
I am working on silo design to present in a seminar. Normal pressure on the silo wall is to high and need a prestress (post tension). Design is done by using Eurocode.
My question is about post tensioning force in combination. According to eurocode-2, prestressed force can be accepted as permanent actions. Because of this, we have to use dead load combination factor (1.35) as far as i am concerned. But in some case, for example combination including temperature effect, combination is given below;
1.2Phe(Live Load) + 1.2T (temperature load) + 1.0PT (dead load, permanent action), PT: Post Tensioning Force.
This combination is forced reinforcement a lot. Design will be impossible because of high tension force.
Shortly, i need some combination factors which include the post tensioning force.
EDIT: Is this load assumed as self-straining force like temperature ecceft?????
Best Regards. ■