(1 同济大学土木工程学院  上海 200092；2 三峡大学土木水电学院  宜昌 443002)
【提要】在双伸臂梁整体稳定分析中引入等效计算长度系数并得出其计算公式，按照《钢结构设计规范》受弯构件整体稳定性设计中的相关内容，由等效计算长度系数推导出了双伸臂梁整体稳定系数的表达式，给出了完整简洁的双伸臂梁整体稳定设计的计算步骤和设计公式。通过试验数据与公式计算结果的对比，证明了该设计公式具有较高的精度。
【关键词】  双伸臂梁  整体稳定  等效计算长度系数  设计公式
Overall Stability Design and Experimental Certification of Bioverhanging Beam/Li Kun1,Sun Kaichang2(1 Dept. of Structure Engineering,Tongji University,Shanghai 200092,China;2 Civil Engineering and Hydroelectricity College,Sanxia University,Yichang 443002,China)
Abstract:The equivalent calculated length coefficient is introduced and its formula is deduced in the overall stability design of the bioverhanging beam.Formulas of the overall stability coefficient of the overhanging beam are also deduced from the equivalent calculated length coefficient in accordance with the design code of steel structures.The integrated and precise design process and formulas are offered.It is verified that the design formulas have perfect precision by contrasted between experimental data and results of the design formula.
Keywords:bioverhanging beam;overall stability;equivalent calculated length coefficient;design formula