大跨径钢桥结构受横向荷载作用研究  

Study on Transverse Loading of Long-Span Steel Bridge Structures

作　　者：王斌 WANG Bin(Xinjiang Railway Survey and Design Institute Co.Ltd.,Urumqi 830011,China)

机构地区：[1]新疆铁道勘察设计院有限公司,乌鲁木齐830011

出　　处：《工程建设与设计》2024年第8期61-63,共3页Construction & Design for Engineering

摘　　要：提出了一种有效的大跨径钢桥结构风致失稳的可靠性评估方法,采用特征值法进行风致稳定性预测,以及广义一阶可靠性算法进行可靠性评估。通过MATLAB软件开发了评估方法与ANSYS联动的程序。以主跨度为550 m的大跨径钢桥为计算模型,验证了该评估方法和软件联合的适用性和应用优势,通过灵敏度分析确定了对大跨径钢桥抗风失稳破坏可靠性影响最大的随机变量。This paper presents an effective reliability evaluation method for wind-induced instability of long-span steel bridge structures.Eigenvalue method is used to predict wind-induced stability,and generalized first-order reliability algorithm is used to estimate reliability.The program of linking the evaluation method with ANSYS is developed by MATLAB software.Taking a 550 m long span steel bridge as the calculation model,the applicability and application advantages of the combination of the evaluation method and software are verified,and the random variables that have the greatest influence on the reliability of the long span steel bridge against wind instability are determined through sensitivity analysis.

关 键 词：钢桥 大跨径 失稳破坏 可靠性评估 

分 类 号：U441.2[建筑科学—桥梁与隧道工程]