摘要
用有限元法计算了双轴和单轴对称楔形工字钢简支梁在不等端弯矩作用下的弹性弯扭失稳临界荷载，与CECS102：2002中公式的计算结果进行了对比，发现后者偏大15％～45％。提出了新的变截面梁临界弯矩计算式，其表达形式与等截面梁的公式相同，便于工程应用。
The elastic buckling of tapered beams with doubly- and mono-symmetrical cross sections under non-uniform moment are studied by FEM. Comparison is carried out between FEA results and those calculated by the formula in Code CECS 102：2002, and it is found that CECS 102：2002 gives 15%～45% higher critical moment than the FEM. A new critical moment formula of tapered beam is proposed, which is similar to the expression for beams with uniform cross-section.
出处
《建筑结构》
CSCD
北大核心
2006年第1期31-34,共4页
Building Structure
关键词
临界弯矩
变截面梁
弯扭屈曲
critical moment
tapered beam
flexural-torsional buckling
steel
l-beams
