大跨径无铰拱桥拱肋温差变位估算  

Displacement Estimation of Temperature Change for Long Span Arch Rib without Hinge

作　　者：文水兵 WEN Shui-bing(Shanghai Research Institute of Building Sciences,Shanghai 200032,China)

机构地区：[1]上海市建筑科学研究院,上梅市200032

出　　处：《公路》2020年第8期142-146,共5页Highway

基　　金：上海市建筑科学研究院(集团)有限公司科技创新平台项目,项目编号HT0218121S0401。

摘　　要：为分析整体温差对大跨径无铰拱桥拱肋各控制断面变位的影响,通过对大跨径拱桥拱肋参数的取值范围统计结果,建立不同拱肋参数影响分析的有限元模型,分析了同一条件下矢跨比、跨径、拱轴系数、拱肋刚度等参数对拱肋温差变位的影响程度,提出了无铰拱桥拱肋各控制断面整体温差引起的竖向位移估算公式,并用实例模型和实测结果对估算公式进行了验证,保证规定条件下拱肋变位估算的准确性,为大跨度无铰拱桥拱肋温差变位定量分析提供了便捷的估算方法。In order to analyze the influence of temperature change on the displacement of the control section of long span no-hinged arch rib,the finite element analysis of the different arch rib parameters is established by statistics of the value of the arch rib parameters of the long span arch bridge.Under the same condition,the influence degree of the rise-span ratio,the span length,the arch-axis coefficient and the arch rib stiffness of the arch by temperature changes is analyzed,the vertical displacement estimation formula of the control section of no-hinged arch rib caused by temperature changes is proposed.Real bridge model results and the real measured results verify that the estimation formula is suitable for estimating the arch rib displacement under the specified conditions,and this is a convenient method for the quantitative analysis of displacement estimation of long span no-hinged arch rib by temperature change.

关 键 词：桥梁 无铰拱 温差效应 拱肋参数 估算 

分 类 号：U441.5[建筑科学—桥梁与隧道工程]