Tests of cold-formed high strength steel tubular T-joints

Strength predictions of circular hollow section T-joints of steel grade 1100 MPa

“…A robotic gas metal arc welding (GMAW) was employed in the welding between brace and chord of the CFHSS CHS T-joints, which is the same as those for CFHSS tubular joints [40,42,57]. The AWS D1.1M Specification [62] was followed in the fabrication of the T-joints.…”

“…It conformed to Class ER120S-G of the AWS A5.28M Specification [63]. The f0.2,n, nominal tensile strength (fu,n) and elongation of the steel wire were 930 MPa, 980 MPa and 19%, respectively [40,42]. The sizes of weld legs (see ∆1 and ∆2 in Figure 1(b)) in the T-joint specimens are greater than the minimum value specified in the AWS D1.1M Specification [61].…”

“…However, the current international steel design specifications [2][3][4] are applicable for structural steel with nominal yield strength (or nominal 0.2% proof stress, f0.2,n) up to 700 MPa, for example, the European Code EN 1993-1-12 [2]. This gap in terms of steel grades between the market and design specifications has driven the investigations on high strength steel with nominal yield strength not less than 690 MPa, in the last decade, including investigations on material properties [5][6][7][8][9][10][11], beams subjected to three-point bending and/or four-point bending [12][13][14][15], columns subjected to axial compression and/or combined axial compression and bending [16][17][18][19][20][21][22][23][24][25] as well as bolted connections [26][27][28][29][30][31][32][33] and welded joints [34][35][36][37][38][39][40][41][42]. Furthermore, the high strength steel tubular members were also investigated in composite structures, such as concrete-filled steel columns with circular hollow section (CHS)…”

The Effect of Steel Strength on the Behavior of a K‐Joint in a Slim‐floor Truss

“…The steel grades S235, S355, S460, S550 and S690 were studied. The nominal mechanical properties of the materials were taken from standards and material product data sheets [30] [37] for hot-rolled carbon steel, as shown in Equation (3). In this equation, ℎ is strain value at the beginning of strain-hardening range, 1 is a constant calculated based on ℎ and , 1 is the stress value at 1 strain, and ℎ is the strainhardening modulus.…”

Cold‐formed steel T‐joints with semi‐oval hollow section chord: Experimental insight and finite element modelling

“…To mitigate the effect of chord end supports to the stress distribution of the brace-chord junction, the chord length (L0) was designed as the sum of 3 times the chord height (3h0), the brace height (h1), and the length of two steel sitting blocks (180mm). The abovementioned member length design concept has been successfully adopted by previous research studies [24][25][26][27][28]. Longitudinal tensile coupons were wire-cut from the middle of the SOHS flat web, the middle of RHS web with larger depth and the middle of the SHS web at the location with 90 angle from the welding seam.…”