斜拉桥斜拉索热分析温度场模拟方法研究
发布时间：2019-06-11 00:19
【摘要】：文章基于温度场计算理论,利用有限元软件ANSYS建立三塔斜拉桥斜拉索实体单元热分析模型,并采用随时间变化的热工参数(导热系数、比热、热膨胀系数、弹性模量)定义热分析模型,同时利用ISO834升温曲线对斜拉索施加热荷载,计算模拟出斜拉索随时间变化的温度场,得到斜拉索弹性模量的损伤程度。通过计算不同导热系数耐火层下斜拉索的温度场及力学性能,表明选用导热系数1w/(m℃)的耐火层将显著降低斜拉索火灾下的温度,大大提高其抗火性能,为斜拉索的抗火计算和设计提供技术依据。
[Abstract]:In this paper, based on the theory of temperature field calculation, the thermal analysis model of cable-stayed solid element of three-tower cable-stayed bridge is established by using finite element software ANSYS, and the thermal parameters (thermal conductivity, specific heat, thermal expansion coefficient) which vary with time are adopted. The elastic modulus) defines the thermal analysis model, and uses the ISO834 heating curve to apply the heating load to the cable-stayed cable, calculates and simulates the temperature field of the cable-stayed cable with time, and obtains the damage degree of the elastic modulus of the cable-stayed cable. By calculating the temperature field and mechanical properties of cable-stayed cables with different thermal conductivity under refractory layer, it is shown that the selection of refractory layer with thermal conductivity 1w/ (m 鈩，
本文编号：2496844
[Abstract]:In this paper, based on the theory of temperature field calculation, the thermal analysis model of cable-stayed solid element of three-tower cable-stayed bridge is established by using finite element software ANSYS, and the thermal parameters (thermal conductivity, specific heat, thermal expansion coefficient) which vary with time are adopted. The elastic modulus) defines the thermal analysis model, and uses the ISO834 heating curve to apply the heating load to the cable-stayed cable, calculates and simulates the temperature field of the cable-stayed cable with time, and obtains the damage degree of the elastic modulus of the cable-stayed cable. By calculating the temperature field and mechanical properties of cable-stayed cables with different thermal conductivity under refractory layer, it is shown that the selection of refractory layer with thermal conductivity 1w/ (m 鈩，
本文编号：2496844
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