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Statistical Evaluation of the Design Resistance of Headed Stud Connectors Embedded in Solid Concrete Slabs


Medium: journal article
Language(s): English
Published in: Structural Engineering International, , n. 3, v. 23
Page(s): 269-277
Abstract: The design resistance of headed stud shear connectors is critical in the design of composite beams to ensure that the required bending resistance is achieved in both bridges and buildings. The two key studies that evaluated the appropriate partial safety factors for the design equations given in Eurocode 4 were undertaken in the early 1990s, which considered the results from 75 push tests. These studies demonstrated that a partial safety factor of 1,25 was justified for a concrete compressive strength not exceeding 35 MPa. Following the proposed introduction of concrete strengths up to 100 MPa in the Australian bridge Standard AS 5100.6, this paper presents the results of a structural reliability study that extends the earlier studies to include 113 push tests with concrete strengths up to 91 MPa. From this investigation, it is demonstrated that the existing equations for stud failure contained within Eurocode 4, AS 2327.1, AS 5100.6, NZS 3404.1 and ANSI/AISC 360-10 may, in general, be safely extended to include higher strength concretes. However, the existing equations for concrete failure produced predictions that were overoptimistic. Revised design equations are presented that deliver more competitive resistances, whilst still maintaining the required margins of safety.
reliability partial safety factor shear connectors calibration headed studs composite steel and concrete structures international design standards
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