arch324-w09-lecture-unit5 - You assume all responsibility...

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Unformatted text preview: You assume all responsibility for use and potential liability associated with any use of the material. Material contains copyrighted content, used in accordance with U.S. law. Copyright holders of content Architecture 324 Structures II Composite Sections and Steel Beam Design • Steel Beam Selection - ASD • Composite Sections • Analysis Method University of Michigan, TCAUP Structures II Slide 2 /21 Standard section shapes: W – wide flange S – american standard beam C – american standard channel L – angle WT or ST – structural T Pipe Structural Tubing Steel W-sections for beams and columns University of Michigan, TCAUP Structures II Slide 3 /21 Source: University of Michigan, Department of Architecture Columns: Closer to square Thicker web & flange Beams: Deeper sections Flange thicker than web Steel W-sections for beams and columns University of Michigan, TCAUP Structures II Slide 4 /21 Source: University of Michigan, Department of Architecture Source: University of Michigan, Department of Architecture Columns: Closer to square Thicker web & flange Beams: Deeper sections Flange thicker than web Steel W-sections for beams and columns University of Michigan, TCAUP Structures II Slide 5 /21 CC:BY-SA Gregor_y (flickr) http://creativecommons.org/licenses/by-sa/2.0/ Steel Beams by ASD Yield Stress Values • A36 Carbon Steel Fy = 36 ksi • A992 High Strength Fy = 50 ksi Allowable Flexure Stress • Fb = 0.66 Fy • = Lc – Compact Section – Braced against LTB ( l <Lc) • Fb = 0.60 Fy ° = Lu – Compact or Not – Lc < l < Lu • Fb < 0.60 Fy – Compact or Not – LTB failure mode ( l >Lu) Allowable Shear Stress • Fv = 0.40 Fy – fv=V/(t w d) University of Michigan, TCAUP Structures II Slide 6 /21 Source: AISC, Manual of Steel Construction Allowable Stress Design, 9th ed. 1989 Section Modulus Table...
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arch324-w09-lecture-unit5 - You assume all responsibility...

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