Study on wind stability and favorable structural scheme of a three-tower cable-stayed bridge

被引：0

作者：

Zhang, Xinjun ^{[1
,2
]}

Ni, Binbin ^{[1
]}

Zhao, Tianjiao ^{[1
]}

机构：

[1] College of Civil Engineering, Zhejiang University of Technology, Hangzhou,310023, China

[2] Key Laboratory of Civil Engineering Structures & Disaster Prevention and Mitigation Technology of Zhejiang Province, Hangzhou,310023, China

来源：

Wind and Structures, An International Journal | 2024年 / 39卷 / 05期

关键词：

By using a computational procedure of three-dimensional aerostatic and aerodynamic stability analysis of long-span bridges; the dynamic characteristics; structural stability including the aerostatic and aerodynamic stability are firstly analyzed for a three-tower cable-stayed bridge with main spans of 1400 meters; the parametric analysis is then conducted; and finally a favorable structural scheme of the example bridge is proposed and confirmed numerically. The results show that long-span three-tower cable-stayed bridge has significant flexibility with less vertical and especially horizontal stiffness; and is sensitive to the transverse wind action; long-span three-tower cable-stayed bridge exhibits a coupled aerostatic instability mode of vertical bending and torsion; the aerodynamic stability is worse than the aerostatic stability for long-span three-tower cable-stayed bridge; the flutter critical wind speed is significantly reduced by the static wind action; and thus the aerostatic effect must be involved in the aerodynamic stability analysis; the best wind stability is obtained for the example bridge as 2 auxiliary piers are set in each side span and their centerline differs from the side piers by 0.4 times the side span length; the center-to-side tower height ratio is 1.3; the tower height-to-span ratio is 1/5; 4 pairs of crossing cables are set at midspan of main spans; and the girder depth is 5.0 m. © 2024 Techno-Press; Ltd;

D O I：

10.12989/was.2024.39.5.367

中图分类号：

学科分类号：

摘要：

引用

页码：367 / 380

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