基于悬索桥主缆热物性参数试验的温度场研究

Temperature Field Research Based on Main Cable Thermal Parameters of Suspension Bridge

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.