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  1. Roycronos

    Table B4.1b - AISC 360-10

    Right Hokie, sorry, i'm talking about "singly-symmetric I-shaped"
  2. Roycronos

    Table B4.1b - AISC 360-10

    Also, in that Case (16), i think "hc" and "hp" are both regarding compressed fiber right? (I don't know how to edit the thread)
  3. Roycronos

    Table B4.1b - AISC 360-10

    Hello, I need help to calculate a limiting slenderness of the web of a member, specifically in the "CASE 16" of Table B4.1b of AISC 360-10. It is assumed that a Double T-section with simple symmetry should have two possible values ​​"My" (one fiber for the lower end and another value for the...
  4. Roycronos

    Question about Links elements (Sap2000)

    Thanks to both, that's just the case that less I know, but if you tell me that this is the best option, then I will study this case. Thank you very much again.
  5. Roycronos

    Question about Links elements (Sap2000)

    Hello, I need to model a element to have different stiffness values in compresion and tension, but both together I am trying to model a link in SAP 2000 (nonlinear analysis), but I need the links to have different stiffness values in compression and tensile, but both together. I read anothre...
  6. Roycronos

    Frame and Shell Elements !

    Hello! I'm doing a deck of a Bridge, it's of concrete (slab) with steel girders, in Sap2000 I did the Slab with Shell Elements, and the beams with Frame Elements. But after I put every loads and combinations, I need the Forces for the Design of the elements. I was trying to compare the Forces...
  7. Roycronos

    Seismic case for Integral Bridges.

    KDM, what do you think about this method? First I do an abutment with springs, and the another abutment, with Earth Pressure (like a load, with at-rest pressure value for the first iteration), after I need check the displacements in order to verify if it's Active, Pasive or At-rest condition...
  8. Roycronos

    Seismic case for Integral Bridges.

    KMD, after You finish an iteration with Springs, You use "Seisab" in order to find Soil pressure (equivalent) in the abutments right ?, but if I don't have "Seisab", do You have any other method for this? gwynn, do You use "Sap2000" for run "non-linear springs" ?
  9. Roycronos

    Seismic case for Integral Bridges.

    First I apply only Dead Load, Live Load (truck) and Temperature, so I get a Movement of the Wall... With that, I can get from the Curve a Coefficient for the Earth Pressure (I choose Medium Dense Sand for it), and like Temperature +, so I get Passive Earth Pressure Case. So later I apply all...
  10. Roycronos

    Seismic case for Integral Bridges.

    Here is the Curve of the Report NCHRP 343. http://files.engineering.com/getfile.aspx?folder=f3d238b0-1d1e-4f0f-ae05-576b4b18da53&file=Curva_Coeficiente_de_Empujes.JPG
  11. Roycronos

    Seismic case for Integral Bridges.

    PD: I have done the complete Bridge on Sap2000, so I have both Abutments and the Superstructure there... It's a bridge of 2 lanes, so I put 2 Trucks... But if I apply Tº and/or Seismic loads, so 1 Abutment must to get Passive Earth Pressure, but the another ?? (Active Earth Pressure i think)...
  12. Roycronos

    Seismic case for Integral Bridges.

    My bridge have less than 200' in lenght (it's almost 100') I have two questions to your last answer Qshake: 1) If I do these case, 1 or 2, so how I get the value of Coefficients of Springs for the Seismic Case??, because for the Static case, I apply the Tº(+ or -), Dead load and Live load, so...
  13. Roycronos

    Seismic case for Integral Bridges.

    Another Question: Do You this kind of Bridges's Design with Iterations too??? (For the Earth Pressure Case (Active/Passive))
  14. Roycronos

    Seismic case for Integral Bridges.

    Thanks bridgebuster... Really it's a great book for Integral Bridges, but i'm still with my problem, because I don't know how to apply the Earth Pressure in the Seismic Case on Abutments. For the Static Case, I used Design Curves Recommended by NCHRP 343 (1991), (Wall movement/Wall Height vs K)...
  15. Roycronos

    Seismic case for Integral Bridges.

    Hello: I'm looking for a method for the Seismic Design in Integral Bridges, principally I need to calculate the Earth Pressures (Passive and Active I think). The problem that I have is about a iteration, because this case is not completly Passiva either Active, so I don't know how get the real...

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