摘要
基于塑性分析理论,分别利用规范法和截面转换法计算连续组合箱梁负弯矩区的极限抗弯承载力。规范法中先将钢箱梁截面转化为工字型钢梁截面,然后按照规范中已有的方法进行计算。截面转换法中先将钢箱梁截面转换为矩形截面,进一步推导出统一的计算公式。研究结果表明:将2种计算结果与试验结果进行对比,三者吻合很好,说明2种方法均准确适用。2种方法间进行比较,计算结果误差很小,但截面转换法避免了规范法中判断截面类型的步骤,相对简化了计算过程。研究结果为钢-混连续组合箱梁的设计提供了一定的参考。
Based on plastic analysis theory, the ultimate flexural bearing capacity of negative moment area for steel - concrete composite continuous box girder was calculated with the standard method and cross sectional conversion approach, respectively. As to the specification - based approach, the cross - section of steel box girder was firstly converted into I -shaped form, and then the corresponding calculation was conducted according to the existing method in the criterion. By contrast, the cross sectional conversion approach was utilized to derive the uniform formulas through shifting the practical cross - section of steel box girder into rectangular one. The results reveal that the calculated results with above two methods are consistent with that gained from experimental results, which means that the two approaches are valid and applicable. There exists little difference when comparing the results calculated with above two methods, while it relatively simplifies the calculation process with cross sectional conversion approach since it avoids the procedure of judging the section type in the standard method. The research findings can provide certain reference for the design of steel -concrete composite continuous box girders.
出处
《铁道科学与工程学报》
CAS
CSCD
北大核心
2014年第2期1-6,共6页
Journal of Railway Science and Engineering
基金
国家科技支撑计划项目(2011BAJ09B00)
关键词
连续组合箱梁
负弯矩区
规范法
截面转换法
steel- concrete composite continuous box girder
negative moment area
standard method
cross sectional conversion method
