Wind Design Considerations for Steel Joists and Joist Girders - SEAoT

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Yield Line Analysis Model forPrediction of Uplift CapacityP u /2Yield LineP u /2aL sL wPlastic HingeaθΔaaSEAoT State Conference November 6-8, 2008 Houston TX SEAoT - 60
Yield Line Analysis Using Virtual WorkW e = (P u / 2) ΔW eP uΔW i = M p θ (L yl )W iM pθL yl= External Work= Predicted ultimate uplift load= Distance which the load moves thru= Internal Work= Plastic moment capacity of plate,per unit length = F y Z= Angle through which YL rotates= Length of yield line, the lesser ofL w + πa and L sSEAoT State Conference November 6-8, 2008 Houston TX SEAoT - 61
Page 2 and 3:
Introduction‣ Commercial manufact
Page 4 and 5:
Windstorm Damage to Roof in Texas05
Page 6 and 7:
Hurricane Charley Category 4 StormA
Page 8 and 9:
Population Trends in Hurricane-Pron
Page 10: Roof Design to Resist Uplift Loads
Page 15 and 16: 2005 SJI Standard Specification for
Page 17 and 18: 2005 SJI Code of Standard Practice1
Page 20 and 21: 2005 SJI Code of Standard Practice6
Page 23 and 24: 2006 International Building Code•
Page 25 and 26: Standards and Codes• 2005 SJI Sta
Page 27 and 28: ASCE 7-05 Basic Wind Speed MapSEAoT
Page 29 and 30: ASCE 7-05 Specified Wind LoadsSEAoT
Page 31 and 32: ASCE 7-05 Specified Wind LoadsWhat
Page 33 and 34: ASCE 7-05 Specified Wind Loads• M
Page 36 and 37: Properly Applying Wind Loads toStee
Page 38 and 39: Properly Applying Wind Loads toStee
Page 41 and 42: Wind Design Considerations forSteel
Page 43 and 44: Wind Design Considerations forSteel
Page 45 and 46: Properly Applying Lateral Loads toS
Page 47 and 48: Properly Applying Lateral Loads toS
Page 49 and 50: Typical Roof Framing using K-Series
Page 51 and 52: Profile of SJI Standard K-SeriesOpe
Page 53 and 54: Joist Seat Test Program Parameters
Page 55 and 56: Experimental Test SetupINSTRUMENTAT
Page 57 and 58: Typical Load-Deformation BehaviorTe
Page 59: Yield Line PatternsShort and Long A
Page 63 and 64: Research Programs Recommendations
Page 67 and 68: P n = 2 M p L yl / aASD Design Proc
Page 69 and 70: Recommended Bearing Seat Designto R
Page 71 and 72: Recommended Bearing Seat Designto R
Page 77 and 78: Design ExampleDimensions:Length, l
Page 79 and 80: Design ExampleBasic wind speed, fro
Page 81 and 82: Steel Joist and Joist Girder Layout
Page 83 and 84: Steel Joist Design20K6 Rod Web @ 40
Page 85 and 86: Steel Joist DesignDesign DataEnd We
Page 87 and 88: Placement of Bridging to ResistUpli
Page 93 and 94: Summary and Conclusions• Wind for
Page 95: Any Questions?SJI Website: http://w
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Wind Design Considerations for Steel Joists and Joist Girders - SEAoT

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