组合梁负弯矩区栓钉焊趾疲劳评定方法

Assessment Method for Fatigue of Stud Welding Roots in Negative Moment Region of Composite Beam

各国规范中,组合梁栓钉焊趾部位通常采用2种疲劳细节分别进行疲劳检算。但在负弯矩处栓钉焊趾往往承受栓钉剪应力循环和钢梁翼缘拉应力循环的共同作用。引入通常用于计算变幅应力疲劳的线性累积损伤理论,对2种应力循环引起的结构同一部位的疲劳进行评定,给出组合梁负弯矩区栓钉焊趾疲劳评定公式。

In the codes and specificati are usually used to respectively make th parts in composite beam. However, beam are often subjected to the joint cycling of steel girder flanges. In th used for calculation of the fatigue of same part of the structure due to the the fatigue of the stud welding roots ons of most of the e fatigue checking countries, two calculation of kinds of fatigue the stud weldin details g root the stud welding roots in the negative moment region of the action o is paper variable two kin in the n f shear stress cycling of the studs and tensile stress , the linear accumulative damage theory commonly amplitude stress is used to assess the fatigue of the ds of stress cycling and the assessment formulae for egative moment region are also provided.