Hira Malik
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Again, I am not asking why to provide this reinforcement, rather what's the criteria of providing these bars. Can please someone help? Which bar, what length, what angle, etc.
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Underground water tank base slab as a foundation
Hira Malik replied to Fatima Khalid's topic in Foundation Design
Have you tried working it out manually? I too sometimes get over-punching values from SAFE. The punching values you have attached are for what thickness? As I told you before, 18" thickness should suffice in this case. The axial load values are very good and shouldn't require a 30" thickness. Confirming that your ETABS Model is correct. -
Yes, but I need the criteria for providing diagonal reinforcement. I guess it's provided at 45 degree but not sure where that cam from.
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ILYAS reacted to a post in a topic:
CHAMFER REINFORCEMENT
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WHAT IS THE CRITERIA OF PROVIDING DIAGONAL REINFORCEMENT AT THE CORNERS OF A SLAB-WALL JUNCTION?
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Yes. And each wall will have soil pressure from outside and water pressure from inside.
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Not sure about this. Both walls will act individually won't they? Yes the inward water and outward soil pressures on each one wall will cancel each other but not completely. Therefore, I am considering the Culvert as empty to maximize the outward soil pressure.
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Yes its a culvert with long walls and slab on top. And so it cant be designed as a retaining wall. But due to longer length, main reinforcement will be that along the shorter span i.e. height (vertical reinforcement). I was thinking it should be designed using attached formula for for FEM when performing Moment Distribution, and W will be same as we do for triangular load. I was just confused if I need to use the walls coefficient method but I guess that's for walls with 2-way action which isn't the case here.
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Hira Malik reacted to a post in a topic:
Beam spring Tunnel in ABAQUS! (SAP2000)
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Those are for 2 way slabs types I guess ? My wall is 17m in span and 1.5m in height i.e. one way and main reinforcement will be along height... so it will be simply designed by taking soil lateral loads as (ka*unit weight*height) right?
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UmarMakhzumi reacted to a post in a topic:
Beam spring Tunnel in ABAQUS! (SAP2000)
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She is already in contact with me :). But unfortunately I had to get involved on another project, leaving the tunnel design as it was. Still I have shared all the stuff I had with her. I was hoping we have a tunnel design expert here in the group. Really needed.
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- soil-structure
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I am trying to do the design of culverts (single and multi cell) using moment distribution method. 1. Confused about how to calculate horizontal and vertical moments in the wall. Which one will govern? 2. ACI 350-01 says use minimum shrinkage reinforcement ratio as 0.003. Which seems to result in #4 bars @4"c/c which seems too much. 3. Can anyone give me the link to download ACI 350-06 ? 4. Any excel sheet or document using moment distribution for culvert design will really help.
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MOVING AND STATIC LOAD CASE IN SAP2000
Hira Malik replied to Hira Malik's topic in General Discussion
Yes that I have already done because I always work through load combinations but to my surprise, when I made such a combination, it didn't appear in the display frame forces dialogue box. Will try again. JazakAllah to both of you -
I am modeling a culvert in SAP2000. I am unable to define a load case in which I can include both static and moving loads together. Is there a way I can run the model and check results for traffic and other static loads together? Or they can only be checked one at a time?
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How? How can I select all circular members at once and apply variable intensity of any pressure? Such that its max at top and decreases towards the bottom.
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Check the attached model. Rock pressures are as attchaed in previous post. Other loads are as follows: Top and bottom external pressures (kn/m) 2303.5 and 2336.5 Top and bottom internal pressures (kn/m) 863.5 and 896.5 Grout pressure is also attached. No idea why is it only acting at top 120 degrees
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OK. So is this only for the lateral rock pressure or the other pressures such as internal and external water pressure, and grout pressures be also applied in the 2-2 direction? I will attach the model with the loading details. Kindly check it if you have some time.