Structural Steel Design, Fifth Edition, McCormac and Csernak, 2012 (International
Tension members are found in: Bridge trusses, Roof trusses, Towers, Bracing systems As tie rods Structural Steel Design, Fifth Edition, McCormac and Csernak, 2012 (International 2
Structural Steel Design, Fifth Edition, McCormac and Csernak, 2012 (International 3
Types of Tension Members Circular Rods One of the simplest of tension members Difficult to connect to many structures Single Angles ( used in roof trusses) Double angles Tees (used in welded trusses) Channels (Bridges and large roof trusses) W sections (Bridges and large roof trusses) Built up from plates and rolled shapes ( to have sufficient cross-sectional area and rigidity) Structural Steel Design, Fifth Edition, McCormac and Csernak, 2012 (International 4
Steel cables are tension members in suspension bridges as roof supports Strength of about 200,00 to 250,000 psi Structural Steel Design, Fifth Edition, McCormac and Csernak, 2012 (International 5
Members consisting of more than one section need to be tied together. Tie plates or tie bars are used to tie them Structural Steel Design, Fifth Edition, McCormac and Csernak, 2012 (International 6
Pn Nominal Strength Ag Gross area An Net area Ae effective net area 7 Structural Steel Design, Fifth Edition, McCormac and Csernak, 2012 (International 7
Empirical equation, AISCS (B4.3b) 𝑠 2 4𝑔 Bolt holes = D + 1/8 An = Ag – n ( D + 1/8) t + 1 𝑛−1 𝑠 2 4𝑔 𝑡 Empirical equation, AISCS (B4.3b) 𝑠 2 4𝑔 S is the pitch (distance c-t-c parallel to Tension) g is the gage (distanc c-t-c perpendicular to Tension) Structural Steel Design, Fifth Edition, McCormac and Csernak, 2012 (International 8
Net Area Calculations Structural Steel Design, Fifth Edition, McCormac and Csernak, 2012 (International 9
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Structural Steel Design, Fifth Edition, McCormac and Csernak, 2012 (International
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Effective Net Area Ae U is a factor to account for non uniform stress distribution Value of U is affected by: cross section of the member Length of connection Structural Steel Design, Fifth Edition, McCormac and Csernak, 2012 (International 24
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3-35 Determine the allowable strength of the section WT6x26 3-35 Determine the allowable strength of the section WT6x26.5, A992 steel, attached through the flange with six – 1 inch diameter bolts as shown in Fig. P3-35 Structural Steel Design, Fifth Edition, McCormac and Csernak, 2012 (International 34
جداول خصائص الفولاذ ومقاطع الفولاذ الانشائية مقرر منشآت معدنية مقرر منشآت 5 تجدها في المكتبة