多塔部分斜拉桥参数敏感性分析

Sensitivity Analysis on Parameters of Multi-pylon Partial Cable-stayed Bridge

摘要:

为研究多塔部分斜拉桥的主要参数对其结构受力性能的影响，统计了国内外81座多塔部分斜拉桥的设计参数分布区间，并以一主跨225 m的温州瓯江三塔四跨多塔部分斜拉桥为依托，结合理论分析以及有限元计算，分别对多塔部分斜拉桥的主梁高跨比、主塔塔跨比进行参数敏感性分析，得到了该类参数对其结构内力、变形及拉索应力幅等影响的一般规律，可作为同类型桥梁设计的参考及进一步研究的基础。

Abstract:

In order to study the influence of the parameters of multi-pylon partial cable-stayed bridge on its structural stress performance, the design parameter distribution interval of 81 partial cable-stayed bridges at home and abroad is counted. Based on the three-pylon four-span partial cable-stayed bridge with the main span of 225 m on Oujiang River in Wenzhou, combined with the theoretical analysis and finite element calculation, the parameter sensitivity analysis on the height-span ratio of the girder and the pylon-span ratio of the main pylon of the multi-pylon partial cable-stayed bridge is carried out respectively. The general law of the influence of these parameters on the internal force, deformation and cable stress amplitude is obtained, which can be used as a reference for the design of similar bridges and the basis for the further research.