中央索面预应力混凝土斜拉桥扭转稳定性研究  

Research on Torsional Stability of Central Cable Plane Prestressed Concrete Cable-stayed Bridge

作　　者：肖云华 钟开建 何驰 XIAO Yunhua;ZHONG Kaijian;HE Chi(China Railway No.5 Engineering Group Co.,Ltd.,Changsha 410114,Hunan,China;China Railway No.5 Bureau Group Mechanization Engineering Co.,Ltd.,Hengyang 421010,Hunan,China)

机构地区：[1]中铁五局集团有限公司,湖南长沙410114 [2]中铁五局集团机械化工程有限责任公司,湖南衡阳421010

出　　处：《工程技术研究》2024年第12期18-20,共3页Engineering and Technological Research

摘　　要：文章以湖南西北部某中央索面预应力混凝土斜拉桥项目为例,采用了一种多约束优化方法对斜拉索的索杆预张拉力进行优化,增强桥梁的扭转稳定性。利用ANSYS分析,分析了传统的方法和多约束方法,结果表明:多约束方法的应用能较好地降低桥梁的弯矩,从而提升桥梁的扭转稳定性。相比传统方法,该方法能在保证桥梁整体结构稳定性的前提下,更有效地调整斜拉索的预张拉力分布,减小弯矩对桥梁的影响。此次研究对改善桥梁的结构性能、提高其安全性和可靠性具有重要意义,也为今后类似工程的设计和施工提供了借鉴。Taking a central cable plane prestressed concrete cable-stayed bridge project in northwest Hunan as an example,this paper adopts a multi-constraint optimization method to optimize the cable rod's pre-tensioning force of stay cables and enhance the torsional stability of the bridge.Using ANSYS analysis,the traditional method and multi-constraint method are analyzed.The results show that the application of multi-constraint method can effectively reduce the bending moment of the bridge,thereby improving the torsional stability of the bridge.Compared with the traditional method,this method can more effectively adjust the pre-tensioning force distribution of stay cables and reduce the influence of bending moment on the bridge under the premise of ensuring the overall structural stability of the bridge.This study is of great significance to improve the structural performance,safety and reliability of the bridge,and also provides reference for the design and construction of similar engineering in the future.

关 键 词：斜拉索 ANSYS 扭转稳定性 

分 类 号：U442.5[建筑科学—桥梁与隧道工程]