01.11: NUMERICAL ANALYSIS OF FULL STRENGTH HEAVY BEAM‐TO‐COLUMN BOLTED CONNECTION

Abstract

ABSTRACTThe design of full strength bolted beam‐to‐column beams considering the overstrength factor for the beam material according to EN 1998‐1 is particularly demanding, especially in case of heavy beam profiles in combination with higher grade material (e.g. S355). The elastic design of the full strength connection leads to very stocky joint. The component method presented in EN 1993‐1‐8 that was developed mainly for the design of partial‐strength joints may also be used for the design of these connections, but its application is limited mainly to experts.This paper studies bolted beam‐to‐column joints under monotonic and cyclic loading, particularly hot rolled HEA 600, S355 beam with high bending strength. Two different configurations of bolted connection of HEA 600 to column are studied in order to achieve full strength connection as defined in EN 1998‐1, namely eight‐bolt rib stiffened and haunched stiffened joint configuration. Both joint configurations are first calculated according to EN 1993‐1‐8 using component method, where bolt forces and joint bending strength were determined. The first joint is also designed according to the procedure given in ANSI/AISC 385‐10. The numerical model, based on this design, was built in FE software Abaqus in order to observe the behaviour under monotonic and cyclic loading. The cyclic loading was defined according to the ECCS and ANSI/AISC 341‐10 procedures. The bolt preload was also studied.