Experimental Study on Tensile Bearing Capacity of Single-Row Bolted Angle Steel Joints

In order to obtain a more accurate calculation method for the bearing capacity of angle steel bolt connections， experimental research on the tensile bearing capacity of angle steel single row bolt connection nodes was carried out. Firstly， 150 sets of uniaxial angle steel tensile tests were conducted to study the failure mode and tensile bearing capacity of single row one， single row two， and single row three angle steel bolt connection components， with a focus on evaluating the influence of end distance and spacing on the tensile bearing performance of angle steel.The results indicate that the angle steel undergoes compressive damage to the hole wall and tearing damage to the net section， and the end distance and spacing are important influencing factors on the tensile bearing capacity of the angle steel.The experimental results were compared with the corresponding calculation results of various national standards， and it was found that the Chinese standards considered fewer factors and could not reflect the actual bearing capacity. The European standards considered a comprehensive range of influencing factors but underestimated the actual bolt bearing capacity， while the American standards exaggerated the internal bolt strength and overestimated the bearing capacity of bolt connections.Finally， by fitting the experimental data， an empirical formula for the tensile bearing capacity of bolted angle steel joints was obtained， which improved the calculation accuracy.