摘要
为了掌握组合斜拉桥主梁混凝土桥面板在轴向力和弯矩共同作用下有效宽度系数沿跨长方向的分布规律,进行了空间有限元计算,提出了斜拉索水平轴向力作用下混凝土桥面板有效宽度系数沿跨长方向分布曲线计算公式。同时,通过理论分析得出了弯矩作用下混凝土桥面板有效宽度系数计算方法。研究结果表明:斜拉索水平轴向力在混凝土桥面板中的传递角度可取28°;综合考虑轴力和弯矩复合作用的有效宽度系数实用计算方法,能够准确反映组合斜拉桥混凝土板的应力状态,对保证结构安全、改进设计方法具有重要参考价值。
In order to find out the distribution law of the effective flange width coefficient along the span under axial forces and bending forces, finite element analysis was performed and the formulas for calculating effective slab width coefficient under axial forces and under bending forces were derived. The results show that 28° is the desirable transmission angle of axial force caused by the axial compression of stay cables. The practical calculation method of effective slab width coefficient for large-span composite cable-stayed bridges under the combination action of axial force and bending moment can precisely reflect the stress of the concrete deck plate of composite cable-stayed bridge, and can provide references for the safety of the structure and the design improvement of composite cable-stayed bridges. 3 tabs, 9 figs, 12 refs.
出处
《长安大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2013年第1期51-58,共8页
Journal of Chang’an University(Natural Science Edition)
基金
教育部新世纪优秀人才支持计划资助项目(NCET-07-0121)
中交第一公路勘察设计研究院有限公司科研基金项目(IJKJ-2009-10)
关键词
桥梁工程
组合梁斜拉桥
剪力滞效应
有效宽度系数
轴力扩散角
实用计算方法
bridge engineering
composite cable-stayed bridge
shear lag effect
effective width coefficient
transmission angle of axial force
practical calculation method
