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  1. dtoli

    Elastomeric Bearing Shear Deformation

    You have a shear deformation which is small (i.e. ~ 1"/4"=0.25<0.7) so normally there wouldn't any problem for rebounding. If you are certain that contact surface was released (it is not an anchored bearing) then the only thing I could imagine is a slip between lamination and rubber due to bad...
  2. dtoli

    How would you analyse this beam?

    Regardless of your first comment csd72 that you're right (I would add some tolerances in length and geometry and so on - i.e. flat and parallel end walls) I would like to comment for the design that: Designing the beam as pin ended it is a conservative way for the beam. On the other hand you...
  3. dtoli

    Metal Purlins as compression members in roof bracing system

    While it is very good to have feedback from projects, that doesn't mean that are well designed just because are still standing. I found myself, in the past, being fooled this way and because I am very suspicious in things that don't follow logic I never had the unpleased feeling to see the...
  4. dtoli

    Metal Purlins as compression members in roof bracing system

    These kind of sections have little capacity in axial load (are slender) and so if you cope with large buildings then will be inadequate. I consider two major reasons for that: • Your main frames will be quite apart and so buckling length, • you certainly have to cope with large forces. Also...
  5. dtoli

    Lateral Load distribution on bridge deck: Traditional methods vs FEM

    This, of course, depend on deck arrangement and mostly on the cantilever length. Normally for short cantilevers (supporting sidewalks) the envelope of moments is most severe on the first internal beam (the one after the external) under the condition that heavy traffic loads can reach the...
  6. dtoli

    MINIMUM PERCENTAGE OF REINFORCEMENT IN PILES

    Buildings: [5.8.4 EN 1998-1] Bridges : [6.4.2. EN 1998-2] To these paragraphs in certain areas (i. below pilecup and at soil strata changes with stiffness module ratio more than 6) you should design as potential plastic hinge regions. That means that in buildings you should apply (DCM) the...
  7. dtoli

    RC Design question

    SLS design, in terms of crack control, put limitations in crack width not only for occupants good feeling but mostly for structure durability. In many codes you would see a dependence on these. Cracks in R.C. are unavoidable due to low concrete tensile strength and the way that reinforcement...
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