华南理工大学学报(自然科学版) ›› 2007, Vol. 35 ›› Issue (2): 69-74.

• 交通运输工程 • 上一篇    下一篇

混凝土连续刚构桥箱梁的温度监测与分析

王卫锋1 陈国雄1 马文田2   

  1. 1.华南理工大学 交通学院,广东 广州 510640; 2. 广州市公路局,广东 广州 510080
  • 收稿日期:2005-12-01 出版日期:2007-02-25 发布日期:2007-02-25
  • 通信作者: 王卫锋(1967-),男,博士,副教授,主要从事桥梁结构研究. E-mail:ctwfwang@scut. edu.cn
  • 作者简介:王卫锋(1967-),男,博士,副教授,主要从事桥梁结构研究.

Monitoring and Analysis of Temperature for Concrete Box Girder in Continuous Rigid Frame Bridge

Wang Wei-fengChen Guo-xiongMa Wen-tian2   

  1. 1. School of Traffic and Communications , South China Univ. of Tech. , Guangzhou 510640 , Guangdong , China;2. Guangzhou Highway Bureau , Guangzhou 510080 , Guangdong , China
  • Received:2005-12-01 Online:2007-02-25 Published:2007-02-25
  • Contact: 王卫锋(1967-),男,博士,副教授,主要从事桥梁结构研究. E-mail:ctwfwang@scut. edu.cn
  • About author:王卫锋(1967-),男,博士,副教授,主要从事桥梁结构研究.

摘要: 以观音沙大桥为背景,通过实验测试和计算分析,寻求有普遍意义的温度场分布规律和大跨度连续刚构桥施工过程中的温度效应.应用有限元软件ANSYS 对温度场进行模拟,分析了太阳辐射、风速等边界条件和导热系数、比热等计算参数对温度场的影响,并提出了相应的建议值.模拟计算的温度场与实测温度场吻合得较好,根据模拟的温度场进行结构计算所得的应力和挠度也与实测值相当吻合,从而可以利用当地气象局实测的气象数据来实时模拟混凝土箱梁温度场并进行温度场的温度效应分析。

关键词: 温度场, 连续刚构桥, 监测, 温度场模拟, 温度效应分析

Abstract:

In this paper , the general temperature distrihution principle and the temperature effect in the construc-tion of long-span continuous rigid frame hridges were investigated hy means of site measure , calculation and analy-sis, with the Guanyinsha Bridge as the research target. In the investigation , the finite-element software ANSYS was adopted to simulate the temperature field , and the effects of heat conductivity , specific heat and some houndalγ
conditions such as sunlight radiancy and wind speed on the temperature field were analyzed. Some recommended valuefì were then presented. It is shown that the simulated temperature field accords well with the measured one ,and that the stress and deflection calculated according to the simulated temperature field match the measured values well. As a result , the temperature field and the corresponding temperature-effect analysis of reinforced concrete hox girder can he conducted in real time according to the weather data from the weather hureau.

Key words: temperature field, continuous rigid frame hridge, monitoring, temperature-field simulation, temperature-effect analysis