现代交通技术2025，Vol.22Issue(2)：40-45,6.
负弯矩区双层组合梁截面的底板混凝土厚度研究
Study on the Concrete Thickness of the Bottom Plate in Double-layer Composite Girder Sections under Negative Moment Regions
娄阳崇1
作者信息
- 1. 江苏东方路桥建设养护有限公司,南京 211801
- 折叠
摘要
Abstract
To study the influence of the bottom concrete slab thickness on the static behavior of double-layer composite gird-er sections,the research derives the theoretical formulas of cracking moment and ultimate bearing moment of the double-lay-er composite section respectively based on the elastic theory and the plasticity theory,and two combined test girders are de-signed to conduct the bending test and the experimental data agreed well with the calculated results.Change rules of the crack-ing moment and the ultimate bearing moment under different bottom concrete thickness is analyses based on the verified formu-la.The research result proves that compared to conventional composite girder sections,the cracking moment of double-lay-er composite girder is approximately enhanced by 15％and the ultimate bearing moment is approximately enhanced by 9％.Based on the static performance and plate thickness variation law,reasonable suggestions are proposed for the thickness of the bottom plate of the double-layer composite girder in the study.关键词
双层组合梁/负弯矩区/极限承载力/合理厚度/板厚比Key words
double-layer composite girder/negative moment region/ultimate capacity/reasonable thickness/plate thickness ratio分类
交通运输引用本文复制引用
娄阳崇..负弯矩区双层组合梁截面的底板混凝土厚度研究[J].现代交通技术,2025,22(2):40-45,6.
