摘要
钢管混凝土拱桥的建造过程可以分为相互联系的三个阶段 :拱肋施工阶段、桥面系施工阶段和使用老化阶段 .计算中要考虑它们共同对结构的影响 .在使用老化阶段 ,拱桥在徐变会影响其变形和内部受力状态 .通过使用 ACI2 0 9密闭混凝土的徐变公式和逐步计算法 ,根据拱桥在徐变过程中的特点 ,利用有限元工具计算出拱桥的徐变结果 .从计算结果可以看出 ,钢管混凝土拱桥的徐变与普通有干燥的混凝土是不同的 ,表现在对数时间坐标上 ,其徐变变形即使在几十年后也不会趋于水平 .
The life of CFT arch bridge can be divided into three stages: arch construction, beam construction and age, each of which relates to the other one. In the stage of service, displacement and interior force are changed with the effect of creep of core concrete. And the time-dependent deformation is calculated with the help of FEM software and special mechanical property in the process. The creep function of sealed concrete of ACI 209 and step-by-step method are used. The numerical result reveals that the creep of CFT arch bridge is different from that of RC one, which lasts much longer than usual.
出处
《上海交通大学学报》
EI
CAS
CSCD
北大核心
2001年第10期1574-1577,共4页
Journal of Shanghai Jiaotong University
关键词
钢管混凝土
拱桥
徐变
迭加法
密闭混凝土
Concrete construction
Concrete products
Creep
Structural analysis
