is800-9bc
DESCRIPTION
IS 800- PPTTRANSCRIPT
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Dr S R Satish Kumar, IIT Madras*Section 9 Members subjected to
Combined Forces
(Beam-Columns)
Dr S R Satish Kumar, IIT Madras
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Dr S R Satish Kumar, IIT Madras*SECTION 9 MEMBER SUBJECTED TO COMBINED FORCES
9.1General9.2Combined Shear and Bending9.3 Combined Axial Force and Bending Moment 9.3.1 Section Strength 9.3.2 Overall Member Strength
Dr S R Satish Kumar, IIT Madras
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Dr S R Satish Kumar, IIT Madras*9.2Combined Shear and Bending
Dr S R Satish Kumar, IIT Madras
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Dr S R Satish Kumar, IIT Madras*9.2Combined Shear and BendingSections subjected to HIGH shear force > 0.6 Vd a) Plastic or Compact Section
b) Semi-compact Section
Mfd = plastic design strength of the area of c/s excluding the shear area and considering partial safety factorV = factored applied shear force; Vd = design shear strength
Dr S R Satish Kumar, IIT Madras
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Dr S R Satish Kumar, IIT Madras*9.3 Combined Axial Force and Bending Moment DESIGN OF BEAM COLUMNSINTRODUCTION
SHORT & LONG BEAM-COLUMNS Modes of failure Ultimate strengthBIAXIALLY BENT BEAM-COLUMNS
DESIGN STRENGTH EQUATIONS Local Section Flexural YieldingOverall MemberFlexural Buckling
STEPS IN ANALYSING BEAM-COLUMNS
SUMMARY
Dr S R Satish Kumar, IIT Madras
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Dr S R Satish Kumar, IIT Madras*INTRODUCTIONOccurrence of Beam ColumnsEccentric CompressionJoint Moments in Braced Frames Rigid Sway Moments in Unbraced FramesBiaxial Moments in Corner Columns of Frames
Dr S R Satish Kumar, IIT Madras
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Dr S R Satish Kumar, IIT Madras*SHORT BEAM-COLUMNSPPy = Ag*fy Mp = Zp*fy
Dr S R Satish Kumar, IIT Madras
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Dr S R Satish Kumar, IIT Madras*SHORT BEAM-COLUMNS M = P e
Dr S R Satish Kumar, IIT Madras
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Dr S R Satish Kumar, IIT Madras*LONG BEAM COLUMNS Non Sway FrameMmax = Mo + P
Dr S R Satish Kumar, IIT Madras
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Dr S R Satish Kumar, IIT Madras*LONG BEAM-COLUMNS Sway FramesM = Mo + P
Dr S R Satish Kumar, IIT Madras
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Dr S R Satish Kumar, IIT Madras*LONG BEAM-COLUMNS BCm accounts for moment gradient effects
Dr S R Satish Kumar, IIT Madras
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Dr S R Satish Kumar, IIT Madras*LONG BEAM-COLUMNS Mo/MpMmax/MpM / MP1.01.0
Dr S R Satish Kumar, IIT Madras
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Dr S R Satish Kumar, IIT Madras*SLENDER BEAM-COLUMNSModified Strength Curves for Linear Analysis Minor axis bendingUniaxial Bending
Dr S R Satish Kumar, IIT Madras
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Dr S R Satish Kumar, IIT Madras*BEAM-COLUMNS / BIAXIAL BENDING
Dr S R Satish Kumar, IIT Madras
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Dr S R Satish Kumar, IIT Madras*9.3 Combined Axial Force and Bending Moment
9.3.1 Section Strength 9.3.1.1 Plastic and Compact Sections
9.3.1.3 Semi-compact section fx. fy /m0
9.3.2 Overall Member Strength
9.3.2.1 Bending and Axial Tension Md
Dr S R Satish Kumar, IIT Madras
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Dr S R Satish Kumar, IIT Madras*9.3.2.2 Bending and Axial CompressionCmy, Cmz = equivalent uniform moment factor as per table 18Also CmLT
Dr S R Satish Kumar, IIT Madras
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Dr S R Satish Kumar, IIT Madras*STEPS IN BEAM-COLUMN ANALYSISSteps in Beam-Column AnalysisCalculate section propertiesEvaluate the type of sectionCheck using interaction equation for section yieldingCheck using interction equation for overall bucklingBeam-Column Design using equivalent axial load
Dr S R Satish Kumar, IIT Madras
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Dr S R Satish Kumar, IIT Madras*SUMMARYShort Beam-Columns Fail by Section Plastification
Slender Beam-Columns may Fail BySection PlstificationOverall Flexural YieldingOverall Torsional-Flexural Buckling
Intetaction Eqs. Conservatively ConsiderP- and P- Effects
Advanced Analysis Methods Account for P- and P- Effects, directly & more accuraely
Dr S R Satish Kumar, IIT Madras