Net section resistance of bolted S690 steel angles subjected to tension

Block tearing of S700 high strength steel bolted connections: Testing, numerical modelling and design

“…The eight-node brick element C3D8R [21], which has been extensively used in the numerical modelling of metallic bolted connections [9,10,14,[22][23][24][25][26][27][28][29], was employed herein to model the bolts, inner plates and outer plates of the S700 high strength steel bolted connection specimens.…”

“…The measured engineering stresses nom and strains nom up to the material ultimate stress fu were firstly converted into the true stresses true and true plastic strains pl ln ε according to Eqs (3) and ( 4), to generate the true stress-plastic strain curve up to the true ultimate stress equal to fu(1+εu). Then, the true stress-plastic strain curve was extended until fracture following an assumed linear relationship [9,10,14,[25][26][27], with the true fracture stress equal to Ff/Af and the true plastic strain at fracture equal to ( )…”

Structural behaviour of high strength steel bolted connections

“…The lower ductility of high strength steel materials compared with normal strength steels addresses the necessity of conducting research on high strength steel angle-to-plate connections. Ke et al (2018) and Yam et al (2020) experimentally and numerically investigate the net section failure of S690 high strength steel angle-to-plate connections. Generally, smaller net section efficiency was observed for higher strength steel connection specimens compared against their normal strength steel counterparts and unconservative net section resistances were predicted based on the existing codified design rules.…”

“…Generally, smaller net section efficiency was observed for higher strength steel connection specimens compared against their normal strength steel counterparts and unconservative net section resistances were predicted based on the existing codified design rules. It is worth noting that the S690 high strength steel angle sections adopted in Ke et al (2018) and Yam et al (2020) were fabricated by welding two plain plates. In comparison with welded angle sections, press-braked angle sections have much cheaper fabrication costs and significantly lower membrane residual stresses, indicating the better potential for practical application.…”

“…The engineering stresses  nom and strains  nom up to the material ultimate strength f u , as measured from the tensile coupon tests, were firstly converted into the true stresses  true and true plastic strains pl ln ε according to Equation (3.3) and Equation (3.4), to build the true stressplastic strain curve up to the true ultimate strength equal to f u (1+ε u ). Then, the true stress-plastic strain curve beyond the true ultimate strength until fracture was assumed to be linear (Wang et al 2019;Lyu et al 2019;Lyu et al 2020;Ke et al 2018 andYam et al 2020), with the true fracture strength equal to F f /A f and the true plastic strain at fracture equal to ( )…”