超宽组合梁斜拉桥主梁剪力滞效应研究

Shear Lag Effect Research on the Main Beam of the Cable-stayed Bridge with Super-wide Composite Beam

组合梁斜拉桥受力十分复杂。钢-混凝土结合后,应力流分布有较大的改变;宽箱梁截面斜拉桥随着宽高比的增加,空间效应愈发明显,传统的计算方法无法满足设计要求。研究以曹妃甸工业区1#桥工程为背景,采用空间有限元的方法,研究组合梁斜拉桥主梁剪力滞效应的分布规律,为钢-混凝土组合梁斜拉桥主梁的精细化设计提供参考。

The mechanical behavior of composite beam cable-stayed bridge is very complicated. After the steel-concrete composite, the stress distribution has a great change. With the increase of aspect ratio, the spatial effects of wide box girder cable-stayed bridge become more pronounced,the traditional calculation methods can not meet the design requirements. The research is based on the No. 1 bridge project in Caofeidian Industrial zone, the space finite element method is adopted, and the distribution law of shear lag effect of composite beam cable-stayed bridge is studied. The results provide a reference for the fine design of steel-concrete composite beam cable-stayed bridges.