Risk Management

  • 1.  Loss of energy and bend rebars

    Posted 4 days ago

    This is the theory of negative energy. When steel bars for bending it's energy is lost due to load application of bending. The ability to take loads would be lose. Zero energy may cause collapse of the entire structure. Consider the round beam of which bars are bend circular for a round building, which is like wise the pizza of Italy , it's known to Architecture history. Beam rest on circular beam is again dangerous for its notorious tilted nature . 

    PE. Alex Thomas MASCE FIE 

    Scientist Engineer consult 



    ------------------------------
    Alex Thomas R.Eng, C.Eng, M.ASCE
    Senior Site Engineer
    Geo Structurals Pvt Ltd
    ErnakulamAlexThomasR.Eng, C.Eng, M.ASCEIndia
    ------------------------------


  • 2.  RE: Loss of energy and bend rebars

    Posted 3 days ago

    It would be helpful to me if you could provide a visual description of the point you are making. 



    ------------------------------
    Mitch Winkler P.E.(inactive), M.ASCE
    Houston, TX
    ------------------------------



  • 3.  RE: Loss of energy and bend rebars

    Posted 3 days ago

    Energy is applied for bending the bar it may crack so it's load carrying capacity is reduce. Crank may avoid using two layers of rebars 



    ------------------------------
    Alex Thomas R.Eng, C.Eng, M.ASCE
    Senior Site Engineer
    Geo Structurals Pvt Ltd
    ErnakulamAlexThomasR.Eng, C.Eng, M.ASCEIndia
    ------------------------------

    Original Message


  • 4.  RE: Loss of energy and bend rebars

    Posted 3 days ago

    Apparently this discussion is not about strength loss of the rebars due to cold deformation but may concern torsional shear in curved beams -- or (as the reference to neutral equilibrium seems to indicate) is it about low safety against tilting of structures supported by curved beam? I agree that the failure scenario addressed is unclear.



    ------------------------------
    J.-Martin Hohberg
    Dr.sc.techn, M.ASCE FED
    Sr. Consultant, IABSE e-Learning Board
    Bremgarten / Berne, Switzerland
    ------------------------------

    Original Message


  • 5.  RE: Loss of energy and bend rebars

    Posted 3 days ago

    Kinetic energy while bending is lost since total energy is constant it's being the potential energy. Now it's clear I think 



    ------------------------------
    Alex Thomas R.Eng, C.Eng, M.ASCE
    Senior Site Engineer
    Geo Structurals Pvt Ltd
    ErnakulamAlexThomasR.Eng, C.Eng, M.ASCEIndia
    ------------------------------

    Original Message


Related Content