摘要
钢梁在外扭矩以及梁端约束的作用下,会产生翘曲正应力以及剪应力,传统上利用扇性坐标及双力矩法计算,计算过程很繁琐。许多工程师在设计中对钢梁扭转作用的处理带有一定的盲目性。根据约束扭转的受力及变形特点,以变形协调为基础提出一种新的计算钢梁约束扭转的简化计算方法,该方法可很好的计算钢梁在外扭矩作用下的受力情况。算例计算结果表明,该方法具有很好的精度和准确性,可供工程设计应用。
It can be produced warping normal stress and shear stress for a steel beam constrained at the both ends under an external torsion. It is very complicated to use the traditional treatment for sectorial coordinate and bi-moment. Thusly, the treatment is certain blindness for many engineers in the design of considering the steel girder torsion effect. Through the characteristics of the restrained torsion stress and deformation, a new simply method of the calculation of the beam under restrained torsion was brought, based on the compatibility of the deformation. It can well calculated the steel beam under a external torque. The results show that this simple calculation method has good precision and accuracy, and it can be used for engineering design and theoretical calculations.
出处
《工程力学》
EI
CSCD
北大核心
2013年第11期180-184,220,共6页
Engineering Mechanics
基金
国家自然科学基金项目(51178381)
高等学校博士学科点专项科研基金项目(20096120110004)
关键词
自由扭转
约束扭转
翘曲正应力
翘曲剪应力
扭转剪应力
unrestrained torsion
restrained torsion
warping normal stress
warping shear stress
torsionalshearing stress
