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  1. Usman Tanveer

    Retaining wall loads due to culvert

    Bridge Smith, What is the advantage of dropping the bottom slab at the middle?? Other than reducing the velocity. Does it help the retaining wall in question in any way. SideRuleEra, Economic consideration forced us to choose a box culvert and we will only provide micro piles in areas where...
  2. Usman Tanveer

    Retaining wall loads due to culvert

    Thankyou for your responses and time. AS Peng. I know it seems odd at first sight however we have provided Gabion blocks on the right side of said retaining wall, scouring is not an issue there ,I can increase the slope however that would increase the fill on the culvert. At some locations it...
  3. Usman Tanveer

    Retaining wall loads due to culvert

    Sorry for not elaborating .Yes the purple one is a culvert ,the green ones are head wall. the white one with 2.7859 is the retaining wall I am talking about. The red line is the mountain slope and blue line is the road level. So we have a scenario where the road (blue line)together with fill is...
  4. Usman Tanveer

    Retaining wall loads due to culvert

    Greetings All , I have attached a picture of a culvert supported by retaining wall. The culvert has 6 m fill on top of it including a roadway. What should be the surcharge? in other words what loads should i consider . Should i include the weight of culvert ,water in culvert , fill on top of...
  5. Usman Tanveer

    Bridge Connections

    The second attached file ,showing an anchor in addition to bearing pad
  6. Usman Tanveer

    Bridge Connections

    I have attached those pictures which are causing me confusion in this regard. On one hand the engineer has provided a bearing pad to allow some translational movement, while on the other hand he has provided he has provided an anchor to do the bidding against uplift thus making bearing pad...
  7. Usman Tanveer

    Bridge Connections

    Greetings BridgeSmith, I have provided an elastomeric pad and it take care of all things you mentioned .However in a curved bridge on some of pads ,I am experiencing uplift, small in magnitude but it is there, As elastomeric pads are flexible in translational direction and not longitudinal one...
  8. Usman Tanveer

    Seismic Design of Retaining Wall

    Greetings, I am designing a retaining wall under seismic loads . according to AASHTO we have to use Pae and Pir for this purpose. However softwares like Tekla tedd only use Pae for additional seismic loads. Am i doing something wrong assuming Pir(inertial effect of weight due to seismic activity)
  9. Usman Tanveer

    Bridge Connections

    Greetings BridgeSmith, Yes I am looking for a fully integral abutment hinged below the abutment. Can you tell me where can I find a good design of it?
  10. Usman Tanveer

    Bridge Connections

    Thankyou for your time kostast88. As far as my definition of a hinge is concerned it is same as you described that is, releases moments and transfer forces. I have attached a picture which in my mind is a hinge/pin connection where the development length requirements are not met(hence no fix...
  11. Usman Tanveer

    Bridge Connections

    Greetings . So, the thing is I want to design a hinge/pin connection between deck and abutment. The tricky part is both of them are concrete sections. There are many guides available for steel connection or even steel-concrete sections but for designing concrete-concrete connections the guide...
  12. Usman Tanveer

    Moody's Coefficients for Abutment design

    Thankyou for your replies. The thing which bugs me is what values we have to use for finding Stem center moment coefficient. Either NYSDOT does not define this properly or I am not able to understand .For example for Stem Coefficient, the value of x/a can be 1 with corresponding value of...
  13. Usman Tanveer

    Moody's Coefficients for Abutment design

    Greetings.So, I am designing an abutment together with a wingwall. However I am unable to accurately determine these moody's coefficients for mid or support sections. Can someone tell me what should be the values of x/a and y/b for stem wall, wing wall and base slab for Mx/My?// Greetings.

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