基于悬索桥主缆热物性参数试验的温度场研究
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摘要
推导了主缆结构在芯部加热作用下温度场的稳态与瞬态解析解,采用与实际桥梁相同的试验模型,测试得到了主缆结构的表观热扩散系数与表观导热系数。在采用测试参数的基础上,通过对桥梁主缆温度场的有限元计算及与实桥主缆温度场实测结果的对比,证明了计算方法的精确和可靠,可用于悬索桥主缆设计、施工和运营阶段的温度场计算。
The temperature field steady and transient analytical solutions of the main cable structure in heating of the core were deduced. The same test model with the actual bridge tested was used,and the apparent thermal diffusivity coefficient and thermal conductivity coefficient of the main cable structure were obtained. Based on the use of the test parameters,the proposed calculation method was proved to be accurate and reliable,which could be used for the temperature field calculation of the main cable of suspension bridge in design,construction and operational phase,by the the finite element calculation of temperature field of the bridge main cable and its comparison with the measured results of the real bridge main cable temperature field.
The temperature field steady and transient analytical solutions of the main cable structure in heating of the core were deduced. The same test model with the actual bridge tested was used,and the apparent thermal diffusivity coefficient and thermal conductivity coefficient of the main cable structure were obtained. Based on the use of the test parameters,the proposed calculation method was proved to be accurate and reliable,which could be used for the temperature field calculation of the main cable of suspension bridge in design,construction and operational phase,by the the finite element calculation of temperature field of the bridge main cable and its comparison with the measured results of the real bridge main cable temperature field.
引文
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[2]潘永仁,范立础.悬索桥施工中主缆横截面平均温度实用计算法[J].同济大学学报(自然科学版),1998,26(2):114-119.PAN Yongren,FAN Lichu.The calculation method of suspension bridge main cable section in practical average temperature[J].Journal of Tongji University(Natural Science),1998,26(2):114-119.
[3]张永水,罗红,王祖华.温度对悬索桥空缆线形的影响分析[J].重庆交通学院学报,2005,24(6):21-24.ZHANG Yongshui,LUO Hong,WANG Zuhua.The analysis of temperature influence on empty shape of suspension bridge[J].Journal of Chongqing Jiaotong University,2005,24(6):21-24.
[4]张加晚.阳逻长江大桥温度场测试及主缆温度效应研究[D].武汉:华中科技大学,2007.ZHANG Jiawan.Research on Temperature Field Tests WIT Yangtze River Bridge and the Main Cable Temperature Effects[D].Wuhan:Huazhong University of Science and Technology,2007.
[5]白剑.悬索桥施工过程温度场测试及温度效应分析[D].西安:长安大学,2004.BAI Jian.Suspension Bridge Construction Process Temperature Field Ttesting and Analysis of Temperature Effect[D].Xi’an:Chang’an University,2004.
[6]ZELENTSOV Y A,ZELENTSOV V Y.An investigation of the relation between the temperature dependences of the initial unbalance and the output signal of resistance strain sensor bridge circuits[J].Measurement Techniques,2007,50(1):66-68
[7]张国智,胡仁喜,陈继刚,等.ANSYS10.0热力学有限元分析实例指导教程[M].北京:机械工业出版社,2007.ZHANG Guozhi,HU Renxi,CHEN Jigang,et al.Examples of the Rmodynamic ANSYS10.0 Finite Element Analysis Tutorial[M].Beijing:Mechanical Industry Press,2007.
[8]林一宁,余屏孙,林亚超.悬索桥架设期间主缆温度测试研究[J].桥梁建设,1997(3):58-66.LIN Yi’ning,YU Pingsun,LIN Yachao.Testing of the main cable temperature during Suspension bridge erection[J].Bridge Construction,1997(3):58-66.
[9]王润富,陈国荣.温度场和温度应力[M].北京:科学出版社,2005.WANG Runfu,CHEN Guorong.Temperature Field and Thermal Stress[M].Beijing:Science Press,2005.