箱形结构截面扭转中心的确定及应用

Calculation and Application of Torsion Center Position of Box Girder

基于箱形薄壁梁的实际构造情况和用于薄壁构件约束扭转计算的YMANCK第二理论,对工程结构中常用的单箱双室薄壁箱形梁截面的扭转中心位置进行了理论推导,并得到了扭转中心的显式表达式．算例表明,该计算公式正确、使用方便,具有广泛的适用性．

According to the structural characteristics of thin-walled box girder structure and theory of constrained torsion, which is on calculating the constrained torsion of thin walled box beams, the formula for calculating the positions of their torsion centers is presented in this paper. Compared with examples, the formula proves to be accurate, and can be used easily. More over, it can be applied to practical projects.