摘要
通过对U型65Mn钢板限位器的扭转性能研究,推导其弹性扭转刚度及屈服荷载的理论计算公式,给出公式的适用范围.设计制作平直段长度L、宽度b、及钢板厚度t不同的40种限位器,进行静力加载试验.结果表明,限位器扭转位移主要由圆弧段扭转引起,钢板厚度t对限位器扭转刚度影响最大,增加板厚能够有效地增大刚度;板宽与刚度K近似呈一次正比关系;平直段长度越大,限位器扭转刚度越小.利用实验数据对理论公式进行修正,得到公式的修正系数.修正后的理论公式与实验数据吻合较好.
In this study, the torsional behavior of 65Mn U type plate limiter is studied; the theoretical calculation formula of elastic torsion stiffness and yield load are derived, and the applicable range of the formula is given. The 40 kinds of limit device with different flat plate length L, width b, and steel plate thickness t are carried out for static load test. The results show that the torsional displacement of limiter is mainly from the torsion of circular arc section. The thickness of the plate affects the maximum of torsional stiffness of the limiter, and the thickness of slab can effectively increase the stiffness; the width of plate and stiffness K is approximately a linear relationship; the larger the straight section length the smaller the torsional stiffness of the limiter. The theoretical formula is modified by the experimental data, and the correction coefficient of the formula is obtained. The modified theoretical formula is in good agreement with the experimental data.
出处
《北京建筑大学学报》
2016年第4期1-5,22,共6页
Journal of Beijing University of Civil Engineering and Architecture
基金
国家自然科学基金项目(51378047
51408027)
关键词
限位器
U型钢
扭转性能
理论公式
静力试验
limiter
U type steel
torsional behavior
theoretical calculation formula
static load test
