Tek-Tips is the largest IT community on the Internet today!

Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!

Register Log in
  • Congratulations MintJulep on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

Search results for query: *

  1. curvbridger

    Demolition puzzle - removed rivet feature

    Curious - What is the explanation for the flat area on the removal side of what I believe is a standard bridge rivet? What removal methods would have been used? I can see the torch mark, but how was the head removed? Did the head removal method leave the flat area?
  2. curvbridger

    Historical practice for specifying A7-39 Steel

    I am looking at a steel structure built in 1942 by American Bridge Company of Gary, IN. The steel specification has not been recorded in the available documents. The design drawings list design stresses as high as 19.8ksi in tension. The shop drawings list AASHO as the construction...
  3. curvbridger

    Welding A588 to A572

    I have a structure in which weathering steel performance is not an issue, but I have some available A588, and some available A572. What problems could arise from welding these materials together? What electrode should be used?
  4. curvbridger

    Estimate of lateral deflection of curved girder span.

    I am curious if any of you know a simplified method for estimating the lateral deflection of a cirved steel I-girder. I will eventually be doing fe, but I need to know a rough number for preliminaries. The cross-section in the end span contains straight and curved sections, based on a "ramp"...
  5. curvbridger

    Passive Pressure Curves - Barker

    Our local bridge owner has included in its design manual a set of curves describing the passive/active earth pressure coefficients for various sands based on movement at the top of wall. I would like to find the equations that these curves are based on. The chart is credited Barker (1997)...
  6. curvbridger

    Drainage for Tabgent Caisson Wall

    Has any one seen an effective way to establish positive drainage behind a tangent caisson wall in a cut situation with an exposed height of about 30 feet? Could vertical holes be drilled behind the shafts and filled with a free draining material and then outlet at the base of wall somehow...
  7. curvbridger

    Brain Teaser - Angles

    What do the following angles have in common? 10deg23min19.89sec 12deg40min49.38sec 16deg15min36.74sec 18deg55min28.72sec 22deg37min11.51sec 28deg04min20.95sec 36deg52sec11.63sec 43deg36min10.15sec Just a little revisiting of Trig and a break from COGO!!!! Curvbridger
  8. curvbridger

    Stiffness and Concrete Pier Bent Moments

    [Morning] All, I am using a new (state-mandated) software package which gives me the option of applying a ratio of gross to cracked stiffness (Ig/Icr) for the columns of the concrete pier bent I am analyzing. No factor is available to apply to the cap. Is it realistic to analyze this frame...
  9. curvbridger

    Stiffness and Concrete Pier Bent Moments

    All, I am using a new (state-mandated) software package which gives me the option of applying a ratio of gross to cracked stiffness (Ig/Icr) for the columns of the concrete pier bent I am analyzing. No factor is available to apply to the cap. Is it realistic to analyze this frame with a...
  10. curvbridger

    Structure Collapse - Picking up the pieces

    All, A steel frame building collapsed during construction, has been redesigned, and is now being rebuilt. During the collapse, the anchor bolts pulled out of the concrete caisson foundations. My task is to verify that the damaged portion of the foundation has been removed, and that the...
  11. curvbridger

    Rebar slices where tension is changing rapidly

    The aashto and aci codes allow adjustment of the required reinforcement bar splice length based on the ratio of steel area provided to area required. I am looking at some structures which include marginally spliced bars in cantilevered concrete bending members. Accordingly, the tension...
  12. curvbridger

    Rebar Splices in regions of rapid tension change

    The aashto and aci codes allow adjustment of the required reinforcement bar splice length based on the ratio of steel area provided to area required. I am looking at some structures which include marginally spliced bars in cantilevered concrete bending members. Accordingly, the tension...
  13. curvbridger

    Bearing Stiffeners - Nominal Bending resistance?

    I am following AASHTO LRFD (1998) section 6.9.2. I need to define Mr. In the LFRD code (1998) article 6.12.1 refers to H-shaped members. What the devil is being referred to here? Is this an I-shape that we've renamed after turning it on its side? I probably need double or triple stiffeners...
  14. curvbridger

    AASHTO H-shaped members?

    AASHTO (1998 LRFD) article 6.12.1.1 refers to H-shaped members. What in the world is being referred to here? Is this an I-shape which we've decided to rename after turning it on its side? I am trying to proportion bearing stiffeners and am trying to determine the appropriate nominal bending...

Part and Inventory Search

Back
Top