腹板与缘条连接部位的疲劳分析方法研究

The Fatigue Analysis of Web to Chord Attachments

分析了腹板与缘条连接的疲劳计算方法。针对腹板与缘条连接情况,解释了当腹板剪切应力小于缘条拉应力,并计算腹板的细节疲劳额定值时,参考应力仍然选取缘条上拉应力的原因。提出梁缘条钉孔处疲劳强度也需要校核,推导了缘条细节疲劳额定值计算公式,并进行了定性分析。

The fatigue of web to chord attachments is analyzed in the present paper.For the situations of the shear of web litter than the stress of flange,the stress of the flange is chose for the reference stress by calculating the allowable fatigue of web,the reasons of which is investigated.The paper presents that the fatigue of flange should be considered,and the formula of the flange allowable fatigue is obtained.Furthermore qualitative analysis is explored.