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  1. Bridge_Man

    prestressed conc. bridges- consideration of slab effective for composite prop. in -Ve mom. regoin

    Hi, I don't deal much with prestressed concrete bridges and here is my question. I have 2 span bridge, simply supported until the deck comes in. Composite loads including LL will act on the composite section. Am using Leap concrete or open bridge designer (whatever you want to call it) for...
  2. Bridge_Man

    Lpile Moment capacity calculation of an Encased W-shape in a drilled shaft (Unreinforced)

    Update: Ensoft Came back to me with an answer. It seems that the software is not set up to consider non-composite behavior and only considers composite action. If I wish to consider that the behavior is different, I need another tool to estimate the moment curvature (bending stiffness) and...
  3. Bridge_Man

    Lpile Moment capacity calculation of an Encased W-shape in a drilled shaft (Unreinforced)

    Thank you Both for your insight. I will let you know of any developments. Regards!
  4. Bridge_Man

    Lpile Moment capacity calculation of an Encased W-shape in a drilled shaft (Unreinforced)

    PEinc, MTNClimber I actually thought about that, but wouldn't that cause a different issue? passive resistance depends on the diameter of the shaft or in the case of the P-y curve, it would be the non-composite combined stiffness of the shaft and W section. not one of them without the other...
  5. Bridge_Man

    Lpile Moment capacity calculation of an Encased W-shape in a drilled shaft (Unreinforced)

    Using a round concrete shaft with a permanent casing. but you set the casing wall thickness to 0 (allowed by the software/manual) and add the encased shape as an insert. This would be the section am interested in (no casing)
  6. Bridge_Man

    Lpile Moment capacity calculation of an Encased W-shape in a drilled shaft (Unreinforced)

    Hi, I am reviewing a design that was performed using L-Pile for a shaft foundation to support a noise wall embedded post. Basically, the post will support the panels above grade, and the same post will be embedded in a Unreinforced shaft below grade to a certain embedment. The section defined...
  7. Bridge_Man

    Rigid Link Transmittal of Axial load

    yes, either that (a rigid constraint), or what I actually did which is changing the end node location of the leg to be the node on the shell. Thanks !
  8. Bridge_Man

    Rigid Link Transmittal of Axial load

    rb1957, Brother (or sister not sure), you are right on. there is indeed vertical displacement between the 2 end nodes. this shouldn't be the case which indicates the old connection is wrong. I agree that the old model leg is depending on the bending stiffness of the shells. Thanks !
  9. Bridge_Man

    Rigid Link Transmittal of Axial load

    Hi, I found what I think a mistake in a model am working on. I have a tank supported by both a latticed tower and a riser that feeds it water. I previously had the tower leg connect into the ring girder and then get connected via a rigid link to the shells of the tank, but afterwards I thought...
  10. Bridge_Man

    Redistribution of force post-yielding in shell plates (FEA modeling)

    Hi, I have an existing elevated tank supported by both a latticed tower and a cylindrical riser (that feeds it water). The tank has a flat bottom and then bowls into a cylindrical shape as you go higher in elevation. The tank distribution of force (as in how much the tower is supporting Vs...
  11. Bridge_Man

    Historic Turnbuckles capacity

    Thanks all JStephen, man this is quite close to what am working on, I do have upset ends where a turnbuckle connects to, the rod itself will fail way before the turnbuckle will, I only needed to show that.
  12. Bridge_Man

    Historic Turnbuckles capacity

    Thanks to all rb1957, agree, it should be even better, but I need to show that it's actually better Winelandv, and JStephen, thank you so much, I will use the material used at that time mentioned in those manuals with the associated dimensions of the turnbuckle I found in those manuals to...
  13. Bridge_Man

    Historic Turnbuckles capacity

    Hi, I have a turnbuckle that am trying to get its capacity, the only thing I know about this turn buckle is it's size (Std 1-7/8) , its weight (12 lb), and the fact that it was made in 1928, no other info about what standard did it follow or anything else. any recommendations on how to...
  14. Bridge_Man

    Modeling of a Tank supported by a ring girder sitting on a tower (Von-Mises Stress)

    Hi, I am struggling with this one. I have this very old tank (100+ yr) that is still functioning, so we know its OK. I need to perform some assessments on it. Am modeling it using SAP2000 The model consists of the tank modeled as shell plates, a riser that goes up to the tank (also shell...
  15. Bridge_Man

    Modeling of a Tank supported by a ring girder sitting on a tower (Von-Mises Stress)

    Hi, I am struggling with this one. I have this very old tank (100+ yr) that is still functioning, so we know its OK. I need to perform some assessments on it. Am modeling it using SAP2000 The model consists of the tank modeled as shell plates, a riser that goes up to the tank (also shell...
  16. Bridge_Man

    BiaxColumn Design (Double channels joined by lacing at one face, and continuous plates at back face)

    Dik and KootK , thank you guys, I feel better now about my assumptions. Regards!
  17. Bridge_Man

    BiaxColumn Design (Double channels joined by lacing at one face, and continuous plates at back face)

    Hello Engineers, I am assessing an old tower leg that is composed of double channels joined together by plates lacing at the front face and continuous plates the back face. I am having issues trying to design this column for flexure, the easiest assumption is to consider this acting more or...
  18. Bridge_Man

    ASCE 7 Force Coefficient and wind loads on truss towers

    So I assume you are applying a CF of 2 so you can apply that wind pressure on both the windward and leeward . but I think you are doing it conservatively. That means what am doing it right. using the CF per the code and divide that by 2, and then re distribute the same force on both leeward...
  19. Bridge_Man

    AISC E6 Built Up Members

    It does. Thank you !
  20. Bridge_Man

    AISC E6 Built Up Members

    I am going through the same section. If you have a continuous lacing along the length of the column, would you still consider this to be an intermediate connector ? it is not really intermediate is it now ? Thanks

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