摘要
以武汉市江汉四桥(主跨232m的独塔双索面预应力混凝土斜拉桥)为例,对混凝土斜拉桥在施工阶段和使用阶段由荷载及温度作用所导致的结构反应进行了现场检测,对结构中的几何非线性影响进行了比较详尽的分析。结果表明:合拢前由施工荷载所导致主梁位移中的非线性影响最大可达18.8%,索力中的非线性影响最大可达18.3%,由温度作用所导致主梁位移中的非线性影响最大可达14.5%,索力中的非线性影响最大可达16.3%;合拢后由桥面二期恒载所导致主梁位移中的非线性影响最大可达14.1%,索力中的非线性影响最大可达15.3%;成桥后由汽车活载所导致主梁位移中的非线性影响最大可达12%,索力中的非线性影响最大可达9.5%。同时与实测值比较可以看出非线性结果更能反映结构的实际受力状态。
The fourth Jianghan bridge is a prestressed concrete cable-stayed bridge with single pylon, double cable faces. Its structural response such as displacement and stress in beam and pylon, tension in cable on the bridge under dead loads, vehicle load and temperature action during its construction and service stages has been measured. The geometric nonlinear behavior of the bridge is studied in this paper. Comparing with linear analysis, the nonlinear results are found to be in very good agreement with the measured data. The results show that the nonlinear characteristics of the bridge are so pronounced that they should not be neglected in the structural response analysis.
出处
《工程力学》
EI
CSCD
北大核心
2005年第1期200-205,217,共7页
Engineering Mechanics
关键词
斜拉桥
几何非线性
温致效应
混凝土
施工阶段
运营阶段
Cable stayed bridges
High temperature effects
Loads (forces)
Low temperature effects
Nonlinear systems
Prestressed concrete
