高温火灾条件下混凝土的热传导数值模拟分析

摘要

文章研究了高温条件下混凝土圆杆在一维方向上温度传播的数值模拟问题。文中给出了混凝土圆杆在受到瞬时高温条件下的热传导方程，借助有限元软件（ANSYSY）对控制方程进行求解。计算得到了一维混凝土热量传播及温度的分布规律，从其整个温度传播过程中可以看出，高温条件下热传导初期混凝土在纵向方向上存在较大的温度梯度差现象，且在初始阶段的加热段附近可能会存在热波现象。%This paper studies the problem of numerical simulation of concrete under high temperature conditions, round bar in one dimension temperature spread. This paper presents a concrete round rod at high temperature conditions by transient heat conduction equation, using the finite element software (ANSYSY) to solve equations. Calculated the distribution of one-dimensional propagation of heat and temperature of the concrete, from the whole communication process temperature can be seen, a large temperature gradient difference early concrete heat conduction phenomenon under high temperature conditions exist in the longitudinal direction, and heated in the initial stage of segment may exist near heat wave phenomenon.