摘要
在考虑钢筋混凝土箱梁整体变形的基础上,用空间有限元分析程序对单箱单室箱梁顶板、翼缘板在轮胎局部荷载作用下的横向受力进行了系统的参数分析.通过回归分析,得出箱梁在变截面参数下行车道板的横向弯矩与横向受力有效分布宽度的经验计算公式,并将经验值与有限元值及我国现行桥梁规范值(JTJ023-85)进行了比较,表明所提公式在常用参数范围内具有足够精度,并用其对变截面箱梁的横向受力分布规律进行了分析.
The transverse effective distribution width of the top plate and flange of box girder under vehicle load is crucial to the bridge design of box girder, but there is no provision about how to determine the width of box girder with varied sections in the present design code both at home and abroad. So this paper studied the transverse internal force and its effective distribution width of this kind of box girder based on the linear elastic analysis. Some practical formulae for the effective distribution width of the top plate and flange of the girder were derived, which consider the influence of the global stiffness of cross section of box girder. Compared with the results from the present design code for highway bridge in China and the results from the finite element method, the formulae can give satisfactory results.
出处
《湖南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2003年第6期82-85,共4页
Journal of Hunan University:Natural Sciences
基金
国家自然科学基金资助项目(59808005)
关键词
有限元方法
钢筋混凝土箱梁
有效分布宽度
规范
finite element method
box girder
effective distribution width
bridge design code
