摘要
对混凝土斜腿刚构桥受环境温度和外界周期性载荷引起的疲劳损伤进行了研究,将AutoCAD建立桥梁的三维模型导入ALGOR中进行仿真分析。利用红外测温枪测量桥梁表面温度确定温度场边界条件,对箱梁温度场及内部温度应力进行了仿真分析。通过仿真分析获得了桥在不同温度场时的内部应力,得出了桥梁上载荷与温度场共同作用下的桥梁寿命的估算公式。讨论了提高桥梁寿命的措施和方法。
The impact of the environmental temperature and external periodic load on reinforced concrete bridge＇s fatigue life was investigated. The three-dimensional model of the concrete bridge was established by AutoCAD and the ALGOR software for simulation and analysis was introduced. Bridges surface temperature was measured to determine the temperature field boundary conditions by infrared temperature gun. Simulation and analysis were carried out to investigate temperature field and internal temperature stress on box girder obtaining the internal stress of the bridge. The bridge life estimation formula of the load and temperature field together on the bridge were obtained. The measures and methods were discussed to improve the bridge life.
出处
《系统仿真学报》
CAS
CSCD
北大核心
2014年第2期445-450,共6页
Journal of System Simulation
基金
国家自然科学基金(51278235)
云南省高校结构健康诊断重点实验室(平台建设KKKP201207003)
关键词
桥梁工程
环境温度
温度应力
疲劳寿命
斜腿钢构桥
bridge engineering
ambient temperature
temperature load
fatigue life
slant-leg rigid-frame bridge
