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运用ansys软件分别计算不同配筋率下,混凝土的徐变情况,理论计算的方法,公式繁多,求解繁琐,需要求解微分方程,面对每一种配筋率都需要重新进行计算求解;ANSYS数值模拟计算,可以通过APDL编程命令,直接计算出相关结果,实现了模型改变方法不变,求解方便。经过两方法计算结果的比较可看到:ANSYS模拟值与理论计算值两者的计算误差很小,都在可接受范围内。另外ANSYS计算结果还显示:随着配筋率逐渐增加,混凝土的应力应变越来越小,应力应变变化率也越来越小。
Ansys software were used to calculate the creep of concrete under different reinforcement ratio. The theoretical calculation method, the formula is numerous, the solution is cumbersome, need to solve differential equations, in the face of each reinforcement ratio need to be calculated again; ANSYS numerical Simulation calculation, APDL programming commands can be calculated directly to the relevant results, to achieve the same model change method, easy to solve. After comparing the results of the two methods, we can see that the calculated errors between the ANSYS simulation values and the theoretical ones are very small and are within the acceptable range. In addition, the results of ANSYS also show that as the ratio of reinforcement increases, the stress and strain of concrete become smaller and smaller and the rate of change of stress and strain becomes smaller and smaller.