NUMERICAL STUDY ON YIELDING BEHAVIOUR OF NET CROSS SECTION OF HIGH STRENGTH BOLTED FRICTION TYPE JOINTS WITH THICK PLATES AND MANY BOLTS

Abstract

 Design of a high strength bolted friction type joint on which a tensile load applies verifies slip and yield strength of the joint. The yield strength contains yield strength of net cross section of the connected plates and a frictional resistance which transferred through connected surface on the through outside of outermost bolt. The frictional resistance defined in Japanese Specifications for Highway Bridges and Recommendation for Design of Connections in Steel Structures released by Architectural Institute of Japan are different from each other.
 This paper compares the yield strengths and the yield conditions which are specified by the specifications and clarify the difference of them. And in order to clarify the yield behavior of high strength bolted friction type joint, FEM analysis for the joint is carried out focusing on a high strength bolted friction type joint which composes thick plates and many bolts. The analysis provides yield strengths based on some definitions of yielding and indicate frictional resistance transferred on the connected surface. Also, this paper discusses the yield progress of connected plates.