摘要
大跨度拱桥拱肋在吊装施工过程中的稳定性主要影响因素有:拱段接头刚度、安装偏差、风荷载等.从接头抗弯刚度入手,针对3种拱段接头模型,可以分析稳定因素对不同接头模型稳定性的影响,计算拱肋在拱段吊装成拱过程中的稳定系数.计算结果表明,拱肋在拱段吊装成拱过程中稳定系数的最小值略小于规范规定的限值,需要采取稳定性控制措施.
The main influencing factors of the stability of the arch rib of long-span arch bridge in constructing process are the connector rigidity of rib sectors, the fixing deviation, wind load, etc. Beginning from the bending resistance rigidity of the connector and in connection with three connector models, we can analyze the influence of stable factors on the stability of different connector models and compute the stability coefficients of arch rib in constructing process. The computation results show that the minimum value of the stability coefficients is slightly less than the limit value in Road Criterion, so the controlling measures should be taken.
出处
《信阳师范学院学报（自然科学版）》
CAS
2010年第2期300-303,共4页
Journal of Xinyang Normal University(Natural Science Edition)
基金
湖北省交通科技项目(鄂交科教[2007]46号)
关键词
大跨度
拱肋吊装
稳定性
数值模拟
long-span
arch rib in constructing process
stability
numerical simulation
