双向非对称转体连续梁桥抗倾覆稳定性研究
Study on anti-overturning stability of bidirectional asymmetrical swivel continuous beam bridge
李硕 1辛宇 1刘锋 2石岩 3王佐才1
作者信息
- 1. 合肥工业大学土木与水利工程学院,安徽合肥 230009
- 2. 中铁二十四局集团有限公司,上海 200071
- 3. 中铁四局集团有限公司设计研究院,安徽合肥 230023
- 折叠
摘要
文章以双向非对称连续梁桥的转体施工为研究背景,基于精细化有限元分析方法,研究风荷载、结构偏斜等因素对转体桥梁抗倾覆稳定性的影响,并计算抗倾覆安全系数.结果表明:双向非对称转体连续梁桥的纵向和横向倾覆力矩及偏心距均远大于对称转体桥梁,需采用调整节段长度或设置偏心等方式抵消因自重产生的倾覆力矩;在横桥向静阵风荷载作用下,结构状态安全;上部结构偏斜超过1°时撑脚与销轴构件均已失效,偏斜角度的增大会导致抗倾覆安全系数降低.
Abstract
Based on the swivel construction of bidirectional asymmetrical swivel continuous beam bridge,the influence of wind load and superstructure deflection on the anti-overturning stability of swivel bridge is studied by the refined finite element analysis method,and the anti-overturning safety factor is calculated.The results show that the longitudinal and transverse overturning moments and eccentricity of the bidirectional asymmetrical swivel continuous beam bridge are much larger than those of the symmetrical swivel bridge.It is necessary to adjust the segment length or set the eccen-tricity to offset the overturning moment caused by the dead weight.The structure is safe under the transverse static wind load.When the deflection of the superstructure exceeds 1°,the struts and pins have failed.The increase of deflection angle leads to the decrease of anti-overturning safety factor.
关键词
桥梁结构/双向非对称/转体施工/抗倾覆稳定性/安全系数Key words
bridge structure/bidirectional asymmetry/swivel construction/anti-overturning stability/safety factor引用本文复制引用
基金项目
国家自然科学基金资助项目(51922036)
安徽省住房与城乡建设科学技术计划资助项目(2022-YF128)
中央高校基本科研业务费专项资金资助项目(JZ2022HGTA0334)
出版年
2024
NETL
NSTL
万方数据