摩擦型高强度螺栓长接头螺栓传力比研究

Study on the Force-delivering Ratio of High Strength Bolt Friction Grip Long Joint

研究摩擦型高强度螺栓接头的受力机理和极限状态 ,通过非线性有限元分析研究了荷载水平、螺栓排数和螺栓间距等因素对头排螺栓传力比的影响 ,得出结论 ,我国正在制定的基于可靠度理论的《铁路桥涵设计规范》送审稿第二稿中将长接头排螺栓传力比由早先几稿中的 0 .35改为 0 .

In this paper, the mechanical characteristics and limit state of high strength bolt friction long grip joints have been studied. Using finite element method, the influences of several factors, including load level, length of the joint and the distance of bolts upon the force delivering ratio of the first bolt, have been studied. Based on the researches in this paper it can be concluded that it is safe and reasonable to decrease the force delivering ratio of the first bolt from 35% to 30% specified by the new Code for Design of Railway Bridge and Culvert.