Design of Headed Anchor Bolts Engineering（将螺栓的设计工程）.pdfVIP

Design of Headed Anchor Bolts JOHN G. SHIPP AND EDWARD R. HANINGER 3 In current practice the design of base plates is controlled strength bolts. When the tension capacity of the bolt is by bearing restrictions on the concrete (see Fig . 1); shear developed, a ductile failure can be ensured by the shear is transmitted to the concrete largely through anchor bolts, friction mechanism.3 shear lugs or bars attached to the base plate and the tensile In this paper , anchor bolt design ductility is assured by anchorage steel is generally proportioned only for direct causing a failure mechanism that is controlled by yielding stress. Th e embedment requirements for anchorage steel of the anchor bolt steel, rather than brittle tensile failure are not clearly defined by most codes and are left largely to of concrete. Thi s is accomplished by designing the pullout the discretion of the design engineer . Also, there are no strength of the concrete failure cone (Up) such that it provisions to prevent a brittle failure in the concrete as equals the minimum specified tensile strength (F A ) or u t opposed to a ductile failure in the anchor bolt, as provided u full anchorage value of the anchor bolt. See Figs . 2 and for with a probability-based limit states design or Load and 10 for illustrations of the concrete failure cone concep