Experimental investigation on bolted flanged steel pipe joint subjected to flexure

摘要

This paper presents an experimental study on the behaviour of bolted flanged structural steel pipe joint subjected to bending. The sample was prepared by welding a flange to an end of a pipe segment and then joining the two segments of pipe by placing the flanges face to face and fastening using structural bolts through holes in the flanges. The whole assembly was then subjected to flexure by placing on a simple support arrangement and applying two-point loading. Total 16 flanged pipe joint samples were tested having different pipe diameter, flange thickness, bolt diameter etc. The deformation characteristics of the joint demonstrated two different kinds of behaviour: thin flange behaviour and thick flange behaviour. Thin flange behaviour is characterised by local flexural deformation of the flange accompanied by prying action and some bending of the bolts while thick flange behaviour is characterised by contact separation between flanges accompanied by tensile elongation of the bolts.