Tensile Members
Tensile members are structural elements designed to resist axial tensile forces. They are commonly found in trusses, bridges, towers, and bracing systems. Design checks include yielding of the gross section and fracture of the net section, accounting for bolt holes and shear lag effects. The gross area (A_g) is used for yielding checks, while the effective net area (A_e) accounts for reductions due to holes and connection eccentricities. Shear lag reduces the effectiveness of certain portions of the cross-section in transmitting tension. Slenderness limits are also imposed to prevent instability. Codes such as AISC and Eurocode specify minimum reinforcement ratios, safety factors, and design procedures to ensure adequate strength and serviceability.
Knowledge Check
1.What is the primary role of tensile members in structures?
2.Which two limit states are checked in tensile member design?
3.If a steel bar has A_g = 2000 mm², F_y = 250 MPa, what is the yielding strength?
4.What is shear lag in tensile members?
5.Why are bolt holes considered in net section calculations?
6.What is the slenderness limit for tensile members according to AISC?
7.If a plate has A_e = 1500 mm² and F_u = 400 MPa, what is the fracture strength?
8.Which factor reduces the effective net area in tensile members?
9.Why should engineering judgment be applied even when code checks are satisfied?
10.Which factors most directly affect tensile member capacity?