摘要
在广泛收集国内外试验资料的基础上，做了１８片热轧工字钢梁试验，并用非线性有限元增量法编制计算程序；同时引进广义座标系对国内外２１６片梁试验数据进行重分析。提出对《桥涵设计规范》的修改建议，建议中引进改良长细比，使之能反映各种因素对梁稳定的影响，并使其形式能与现行桥规一致，便于应用。
In order to coordinate the revision of the current specifications,tests of 18 hot-rolled I-beams are done after collecting widely information at home and abroad. Taking nonlinear finite element incremental methods, the computer programming is worked out.At the same time,test data of 216 beams taken from home and abroad are analyzed again by introducing generalized coordination.With the aid of the above-mentioned study,some suggestions on the revision of the current specifications are put foreward. Improved slenderness ratio is introduced, reflecting various factors which have an effect on the lateral buckling of the steel beams, and making the expression accord with the current specifications.
关键词
工型梁
非弹性失稳
稳定性试验
有限元法
I-beams,inelastic lateral buckling,stability tests,finite element methods
