摘要
将常规线型作为空腹式拱桥的拱轴线,有着方法上和理论上的不完善.基于空腹式拱桥的实际恒载分布,提出将主拱圈自重与行车道系自重之和的压力线作为拱轴线,由受力平衡微分方程,使用四阶Runge-Kutta法进行求解,提出用悬索线与抛物线的组合作为空腹式拱桥新型拱轴线,通过数学分析、拱轴线坐标、主拱圈内力和实际算例,验证了其合理性.
There is theoretic and methodological shortage in using normal line type as arch axis of open-spandrel arch bridge.Based on the dead load of this type of arch bridges,a new arch axis,which is the pressure line of main arch ring deadweight plus deck system deadweight,is proposed.The balance differential equation is deduced and numerical solution is obtained by fourth order Runge-Kutta method,and a linear combination of cable line and parabola is proposed for new arch axis of open-spandrel arch bridge,it is verified by mathematical analysis,arch axis coordinate,main arch ring internal force and an arch bridge calculation example.
出处
《交通科学与工程》
2010年第2期26-30,47,共6页
Journal of Transport Science and Engineering
基金
国家自然科学基金项目(50678173)
华东交通大学科研基金资助项目(06ZKTM01)
江西省道路与铁道工程重点实验室资助
关键词
空腹式拱桥
新型拱轴线
平衡微分方程
open-spandrel arch bridge
rational arch axis
balance differential equation
