摘要
以山区某高速公路高墩大跨度连续刚构桥为工程实例,对其在最高墩阶段、最大悬臂阶段和成桥阶段的线弹性稳定性进行计算,找出稳定安全系数最低的阶段。在此基础上,对其进行非线性稳定分析,讨论非线性因素对稳定性的影响,探讨相关参数如混凝土强度等级、桥墩纵向尺寸、双肢薄壁桥墩间距、系梁设置、基础刚度对稳定安全系数的影响,并得出结论,研究成果可为高墩大跨度连续刚构桥的设计与施工提供参考。
On the background of a long - span continuous rigid - frame highway bridge with high piers in moun-tain areas, linear elastic stabilities were analyzed at the stages of completion of pier construction,the largest can-tilever and completion of the whole bridge for finding the minimum stability safety coefficient , respectively. Onthis basis, nonlinear stability of the bridge was analyzed and the influences of nonlinear factors on stability werediscussed. The influences of different parameters such as the concrete strength grade, longitudinal dimension ofthe pier, distance between the twin thin- walled piers, tie beam installation and foundation rigidity on stabilitywere explored, and then some useful conclusions were drawn. The results can provide some references for the de-sign and construction of long- span continuous rigid -frame bridge with high piers.
出处
《铁道科学与工程学报》
CAS
CSCD
北大核心
2016年第3期506-511,共6页
Journal of Railway Science and Engineering
基金
湖南省交通科技计划项目(201022)
关键词
高墩
大跨度
连续刚构桥
稳定性
施工阶段
非线性
high pier
long - span
continuous rigid - frame bridge
stability
construction stage
nonlinearity
