摘要
为使波形钢腹板-混凝土组合箱梁的正截面弯曲应力计算能够应用平截面假定,根据该组合箱梁模型试验在弹性阶段的应变实测数据和空间有限元计算结果,忽略波形钢腹板的抗弯贡献,假设上、下翼板的混凝土纵向正应变在弹性阶段符合“拟平截面假定”,并运用变分法理论进行了证明。算例表明据“拟平截面假定”计算的翼板应力计算值与有限元法计算结果吻合。“拟平截面假定”为波形钢腹板-混凝土组合箱梁的弯曲应力计算及抗弯承载力计算在理论上提供了必要的变形协调条件。
A quasi plane assumption is adopted to evaluate the flexural capacity of steel-concrete box girders with corrugated steel webs. The assumption is made based on model test results and data of finite element analysis. It is validated by the theorem of minimum potential energy. Under the hypothesis, the normal stress and flexural deformation in the mid-span of steel-concrete composite box girders with corrugated steel webs agree with that of model test and 3-D finite element analysis excellently.
出处
《工程力学》
EI
CSCD
北大核心
2005年第5期177-180,198,共5页
Engineering Mechanics
基金
国家自然科学基金项目(50078014)
关键词
桥梁工程
计算假定
变分法
拟平截面假定
钢-混凝土组合箱梁
波形钢腹板
变形协调
brige engineering
calculating assumption
theorem of minimum potential energy
dummy horizontal section assumption
steel-concrete composite beam
corrugated steel web
harmonious deformation
