独塔混凝土自锚式悬索桥结构静力分析

Structural Static Analysis of Single Tower Concrete Self-anchored Suspension Bridge

依托贵州某独塔混凝土自锚式悬索桥,选取主缆矢跨比、主缆弹性模量、混凝土收缩徐变等参数,采用数值模拟对影响结构主要静力特性的设计参数进行分析,根据分析结果汇总了参数影响评估表。分析结果表明:主缆矢跨比的选取对结构主要静力行为影响较小,可根据不同桥型及景观要求适当调整;主缆弹性模量及混凝土收缩徐变效应对结构静力行为影响较大,应在设计初期选取合理材料,并在施工过程中视情况而定适当增加混凝土加载龄期;主缆矢跨比为一般性参数,主缆弹性模量及混凝土收缩徐变效应为重点参数。

The paper relies on a single tower concrete self-anchored suspension bridge in Guizhou,the main cable span ratio,main cable elastic modulus,concrete shrinkage and creep and other design parameters are selected,using numerical analysis methods,the design parameters which affect the main static characteristics of the structure are analyzed,and according to the analysis results,the parameter impact evaluation form is summarized. The results show that the selection of the main cable span ratio has less influence on the main static behavior of the structure,witch can be adjusted according to different bridge types and landscape requirements. The elastic modulus of the main cable and the shrinkage and creep effect of the concrete have a great influence on the static behavior of the structure. The material should be selected early in the design reasonable,and in the construction process,the age of loading concrete should be increased as the case. The main cable span ratio is a general parameter and the main cable elastic modulus and concrete shrinkage and creep effects are the key parameters.