Influence of the hole clearance on the bolted joints rotational characteristics

摘要

Design joint characteristic, i.e. moment - rotation curves are predicted according to code regulation, like EC-3 - part 1—8. This method and many available analytical models are based on perfect joint performance. In the most of the real joint arrangements imperfections can be observed, which influence joint behaviour. The following stages can be observed in bearing type joints behaviour: under erection loading connection behaves like slip - resistance, showing rather high stiffness. After increasing of loading, slip occurs and joint started to work for shear and bearing. This initial slip and rotation decrease the initial stiffness of the joint. The main aim of this paper is to present the influence of the hole clearance on the joint characteristic. The analytical formulae for determination of M-φ characteristics of bearing type joint with consideration of the hole clearance are presented and compared with experimental tests results.