高强度结构钢高强度螺栓摩擦型连接节点试验研究

Experimental study on high strength bolts slip-critical connection for high strength steel

针对钢板材质为Q460,Q550,Q690的高强度结构钢和Q345钢、摩擦面经过抛丸除锈和喷硬质石英砂处理的试件进行了高强度螺栓摩擦型连接试验。通过试验了解钢材强度、摩擦面处理方法以及螺栓排布方式对抗滑移系数的影响。试验结果表明,三种高强度钢材的抗滑移系数比较接近,与Q345钢的抗滑移系数相比有所降低。结合试验分析,为高强度结构钢高强度螺栓摩擦型连接节点的设计提供参考。

Experimental tests on high strength bolt slip-critical connection were carried out using the specimens made of highstrength steel with steel grades of Q460, Q550, Q690 and Q345 grade steel, and the friction surfaces of specimens weretreated in two ways of shot blasting and hard quartz sand blasting. The slip coefficient was obtained through theexperimental tests to estimate the effects of steel strength, friction surface treatment and bolts arrangement. Theexperimental results show that the slip coefficients of three types of high strength steel are very close and slightly lower thanthat of Q345 grade steel. The experimental analyses provide reference for the design of high strength bolts slip-criticalconnection for high strength steel.