Unequal width connections of square hollow sections in Vierendeel trusses

This paper presents the results attained in an extensive research programme on Vierendeel joints in hollow structural sections (HSS). A total of 29 specimens comprised of five distinct connection types were tested and their strength and stiffness properties were recorded.As most of the joints tested behaved in a semi-rigid manner, a stiffness method for analysing Vierendeel trusses comprised of such joints is presented. Design curves for …