大跨度拱桥拱轴线优化研究  

Optimum Research on Axis of Long Span Arch Bridge

作　　者：王建东 黄红兵 林阳子[3] 彭友松[3] 

机构地区：[1]宁夏公路建设管理局,宁夏银川750001 [2]绍兴市曹娥江袍江大桥建设工程指挥部,浙江绍兴312085 [3]江苏省交通科学研究院长大桥梁健康检测与诊断技术交通行业重点实验室,江苏南京211112

出　　处：《现代交通技术》2010年第3期29-31,72,共4页Modern Transportation Technology

摘　　要：以一条初始的拱轴线形及某种特定的荷载工况为基础,建立有限元模型,根据拱轴线优化的基本原理,通过有限元程序的迭代计算,求得在特定荷载下拱圈上的各个离散点接近于压力线的坐标;再利用曲线拟合的方法得到可应用于实际工程的各次抛物线形,并从中选出最合理拱轴线。最后,给出了详细的工程算例,算例结果表明:文中所提出的算法较好地减少了拱轴线与压力线的偏差,改善了拱圈的受力状态。The arch bridge axis are analyzed by estimating a finite element model based on a primal arch bridge axis and a given load condition.Then in the light of the rationale of the optimum of arch bridge axis, particular attention is paid on the applying the alternating calculations of finite element method program to gain the coordinate of the scattered spots in arch rib that are close to the pressure line.Then by using the method of curve fitting, another attention is paid on gaining several polynomials of each degree that can be applied in engineering,then comparing them to confirm a most appropriate arch bridge axis.At last, a instance of practice engineering are given, and the results show that the arithmetic brought forward in this paper reduces the biased error between arch bridge axis and pressure line, and improves the state of bending of arch rib.

关 键 词：拱桥 拱轴线 有限元 优化 

分 类 号：U448.22[建筑科学—桥梁与隧道工程]