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  1. VFF

    Concrete Drag Strip

    Hi everyone, I am currently designing the replacement for the first 500 feet of a dragstrip with concrete, to tie in with the rest of the existing asphalt track. I want to keep the joints down to a minimum, or eliminate them, and I was contemplating using continuous reinforced concrete...
  2. VFF

    Question about your (life) partner

    In Australia, it is very common for Engineers to be married to nurses or teachers. Something about being caring members of the community. Scary thing is when I tell my wife (a primary teacher) all the new management tricks I learnt in my MBA course, she replies that she uses them all the time...
  3. VFF

    Euler buckling in hydrostatic pressure

    But does it need to be a hollow cable?? Is there anything inside the cylinder?
  4. VFF

    Rock anchors for a bridge pier

    Thanks for pointing me in the right direction Panars. I finally downloaded the FHWA drilled shaft guidelines, which is the exact scenario I have. Interestingly, I only found indication to apply a factor of 0.7 to the shaft resistance capacity when in tension rather than compression, to take...
  5. VFF

    Impact Force from falling object

    The approach I have used for flood debris impact loads on a bridge is to start with the mass of object (m), velocity just prior to impact(u) (in my case water, in yours based on the height dropped)and the allowable deflection or stopping distance (s) (which was given in the code - dependant on...
  6. VFF

    Rock anchors for a bridge pier

    Thanks for that Panars. I got hold of the US Army paper OK, but had trouble downloading the FHWA copy. I realise I have probably used some incorrect terminology, as my reinforced concrete pile (800mm diameter) is actually a rock socket, and in tension. My basalt is substantially stronger in...
  7. VFF

    Rock anchors for a bridge pier

    Reading previous posts, I have a situation where the anchor to rock interface is going to be OK, but may have a problem with the weight of the rock pullout cone providing enough stability. I am drilling into basalt bedrock that is fairly solid. I am new to this field, so two stupid questions...

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