Aslam

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Aslam

  1. 1. CALCULATE COLLAPSE LOAD ON THE BASIS OFMOMENT REDISTRIBUTION
  2. 2. SCOPE
  3. 3. FIXED ENDED BEAM SUBJECTED TO TWO POINT LOADING.FIXED ENDED BEAM SUBJECTED TO UNIFORMLY DISTRIBUTEDLOAD.TWO EQUALLY SPAN CONTINUOUS BEAM LOADED WITH APOINT LOAD AT MIDSPAN. .
  4. 4. MOMENt REDIStRIBUtIONAS PER CODESBS CODEBritish code CP 110-1972 allows the peak elastic moments tobe reduced by up to (0.6-c/d)100% but not more than 30%.RUSSIAN CODE Russian regulations apparently have allowed the intermediatespans of uniformly loaded continuous beams of equal span tobe design for equal positive and negative moments and haveallow 30% moment redistribution from the elastic bendingmoment diagram.ACI CODEACI code allow support moments to be changed by up to 20%depending upon the ductility of section
  5. 5. ASSUMED M- φ CURvE
  6. 6. FACtORS AFFECtINg ON MOMENt REDIStRIBUtION Plastic hinge rotation Plastic hinge length
  7. 7. APPlICAtION OF MOMENt REDIStRIBUtION Redistribution of negative moments in continuous nonprestressed flexural members Redistribution of negative moments in continuous prestressed flexural members
  8. 8. MOMENt REDIStRIBUtION PROhIBItED slab systems designed by the Direct Design Method. The failure mechanism of FRP reinforced flexural members should not be based on the formation of plastic hinges.
  9. 9. ASSUMPtIONS
  10. 10. MAtlAB PROgRAM
  11. 11. DEvElOPMENt OF M-FIlEMAIN PROGRAM CALCULATE COLLAPSE LOADSUB PROGRAM DRAW MOMENT CURVATURE DIAGRAM DRAW SHEAR FORCE AND BENDING MOMENT DIAGRAM
  12. 12. CASES tO BE CONSIDERED Fixed ended beam loaded with two point loading. Fixed ended beam loaded with a uniformly distributed load Two equally span continuous beam loaded with a point load at mid span
  13. 13. M – φ CURvE
  14. 14. FIxED ENDED BEAM lOADED wIth twO POINtlOADINg .
  15. 15. FIxED ENDED BEAM lOADED wIth UDl .
  16. 16. twO EqUAlly SPAN CONtINUOUS BEAM lOADED wIth APOINt lOAD At MID SPAN
  17. 17. COMPARAtIvE StUDy
  18. 18. thE END

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