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  1. tatox

    Seismic analysis of a single span bridge according to AASHTO LRFD

    @BridgeSmith true. The whole bridge will act together, since the dowel connection will also placed in the rolled bearing also (assumed as hinge bearing - rolled bearing). Even though there is small differential in the rolled bearing that dowelled with some space gap. So the force that hold the...
  2. tatox

    Load Rating of Simple Made Continuous Steel Plate Girder Bridges

    Simple made continuous is using concrete link slab concrete, right? So basically, it removes the expansion joint. the connecting plate should be designed for live load only or any transient load after dead load like nature: earthquake and temperature. so you must calculate it in staged...
  3. tatox

    Seismic analysis of a single span bridge according to AASHTO LRFD

    So if this bridge in SDC D for example, the force from earthquake to design connection in substructure to upper structure usually some dowels = As x Dead Load Reaction / Response Factor (0.8) will be transferred to pile right ?. So the pile will need to be designed for the earthquake design...
  4. tatox

    Where i can find the jetty lateral displacement design criteria?

    @Smoulder Yes i can find also in BS 6349.2.2010 , and the newest BS 6349.2 is 2019 version as LittleWheels pointing out Regards.
  5. tatox

    Where i can find the jetty lateral displacement design criteria?

    I was kind new to the jetty. Where i can find the code for lateral displacement top pile jetty design criteria. U can't find it at BRITISH STANDARD BS 6349-2:1988.
  6. tatox

    Is there any hand calculation vs FEA modeling Lifting Lug for Steel Alloy

    @ThomasH @SWComposites ( yes, they want 0.6 fy max. with yield is 355 MPa means only 213 MPa max for service load. This is beyond that. @Stress_Eng Since the pin and the fork is given for the design load, then for structural designer only checks the gusset plate that in designer area, while it...
  7. tatox

    Is there any hand calculation vs FEA modeling Lifting Lug for Steel Alloy

    I will re check my FEA plate. The FEA in here is a required for stress-related especially for bridge hanger. i found hand calc vs FEA here: https://www.m4-engineering.com/simcenter-3d-analysis-of-a-pinned-lug/ looks like i need to check pin-hole fit relation, E pin/E plate relation, stress...
  8. tatox

    Is there any hand calculation vs FEA modeling Lifting Lug for Steel Alloy

    Load is straight up. no degrees. I did simple 2D plate analysis with bearing load implementation (see Exercise 15 - Bearing Load - Rev F.zip from F3m4p) or parabolic distribution radial like in SW help Bearing load distribution. the vendor did with solids, maybe radial pressure or contact with...
  9. tatox

    Is there any hand calculation vs FEA modeling Lifting Lug for Steel Alloy

    Hello there I usually design steel lug hanger using AISC or EN 1993-1-9_2006 EUROCODE 3. I have checked that the eurocode or the aisc is sufficient for tension plane failure, single plane failure, double plane failure. The safety factor is sufficient However when i checked it with 2D 6-dof...
  10. tatox

    Maximum height of hauling wall abutment in rock ?

    Hi We got the hauling bridge that may had tall abutment. The soil in near river was too soft, with rock bottom, and the extended length bridge will lay on the mudstone rock. I believe extending the bridge will give more confidence since the pier near river will be very high, with 18m soft soil...
  11. tatox

    AASHTO code provisions related to second order moments

    I dont really know well CSIBridge, but sometimes use SAP2000. SAP2000 has a some kind fuzzy logic that cant detect and input K, or Lateral braced length automatically. Most software had user to input K, Lminor, Lmajor, L braced torsional, L braced length for properly compute design code...
  12. tatox

    Earthquake on Single-span Steel Tied-Arch Bridge , Seismic Review

    Hi, I am not in US, but using AASHTO for design reference. I need friends for discussion, and your experience. AASHTO LRFD said 3.10.9 a. Seismic analysis is not required for single-span bridges, regardless of seismic zone. b. Connections between the bridge superstructure and the abutments...
  13. tatox

    Effective way for Gusset Plate and Bolt Check Design

    I just found the FEA of Bolted Joints - User Guide Seminar by AdaptiveCax on youtube and its model explanation on their website quite useful. They even compare the RBE2/RBE3/compression bolt/contact edge vs solid bolt. They can done the calculation using RBE3 for plate bearing load on the bolt...
  14. tatox

    prestressed reinforced concrete structures in femap

    i believe the prestressed reinforced beam is need the stage construction analysis. There is the birth and dead of element, plus the changing of the load and the changing of the restraint, time related material for creep and shrinkage also the increasing of modulus of the concrete, curvatured...
  15. tatox

    Effective way for Gusset Plate and Bolt Check Design

    Hi. I am currently working for bridge design. For steel bridges truss, the client want to model each gusset connection in FEM. Just like I-35W Bridge Gusset Failure FEM. They want to see the gusset plate stress, and the bolt stress. The load is static elastic for some case due vehicle load or...

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