大跨度矮塔斜拉桥关键节点受力性能的仿真分析
Simulation Analysis of the Stress Performance of Key Nodes in Large-Span Low Tower Cable-Stayed Bridges
黄志强 1张波2
作者信息
- 1. 宁波通途投资开发有限公司,浙江 宁波 315010;宁波市公共工程建设中心有限公司,浙江 宁波,315042
- 2. 宏润建设集团股份有限公司,上海 200235
- 折叠
摘要
宁波中兴大桥跨越甬江,其主桥由于机场航空限高的要求,采用主跨为400 m的大跨度矮塔斜拉桥设计方案.主桥采用V形钢主塔,塔梁固结并通过大型球钢支座支承在主墩上.经分析,索塔锚固区与塔梁固结处是主桥设计的 2 个关键节点.节点构造设计复杂,需借助 3D空间有限元方法对其受力性能进行仿真分析.利用ANSYS软件建立关键节点的3D有限元仿真模型,并与MIDAS整体模型结果进行比较,验证仿真模型的有效性.通过仿真模型,得到不利荷载工况下关键节点空间应力分布的计算结果,为关键节点构造设计提供可靠依据.
Abstract
The Ningbo Zhongxing Bridge spans the Yongjiang River.Due to the height limit requirements of airport aviation,the main bridge adopts a design scheme of a large-span low tower cable-stayed bridge with a main span of 400 m.The main bridge adopts a V-shaped steel main tower,with the tower beams consolidated and supported on the main pier by large spherical steel bearings.After analysis,the anchorage zone of the cable tower and the consolidation point of the tower beam are the two key nodes in the design of the main bridge.The node construction design is complex and requires the use of 3D spatial finite element method to simulate and analyze its stress performance.Establish a 3D finite element simulation model of key nodes using ANSYS software,and compare it with the overall model results of MIDAS to verify the effectiveness of the simulation model.By using simulation models,the calculation results of spatial stress distribution at key nodes under adverse load conditions are obtained,providing reliable basis for the construction and design of key nodes.
关键词
大跨度矮塔斜拉桥/索塔锚固区/墩梁固结处/3D仿真分析/应力分布Key words
large-span low tower cable-stayed bridge/cable anchorage zone/at the consolidation point of pier&beam/3D simulation analysis/stress distribution引用本文复制引用
出版年
2024
NETL
NSTL
万方数据