基于ABAQUS和MATLAB的断层抗大变形管道长度计算

Using ABAQUSand MATLABto Calculate Length of High Deformability Steel Pipeline Crossing Active Fault

通过对比抗大变形管材与普通管材力学性能和经济成本,阐述了确定活动断层处抗大变形钢管道长度的必要性。在忽略活动断层面宽度条件下,研究采用有限元软件ABAQUS对该处普通钢管道进行抗震受力计算,得到管道沿线应变。利用MATLAB软件对大于容许应变值的管道单元进行统计处理,得到大于普通钢管容许应变值的管道长度,加上活动断层面宽度之和即为需要使用抗大变形管道的长度。此方法可得到抗大变形钢管道长度及沿管道长度方向应变分布状况,为活动断层作用下管材选择提供依据。

This paper introduces the necessity of calculating the length of high deformability steel pipeline crossing active fault by comparing mechanical properties and economic costs between the high deformability steel pipeline and the com- mon steel pipeline. Under the condition of ignoring activity fault plane width, the seismic resistance of the common steel pipeline is calculated by the finite element software ABAQUS, and the strains along the pipeline are obtained. Then, the pipe elements which have the strains greater than the allowable strain value are identified and dealt with by software MAT- LAB , and the corresponding pipeline length is obtained. The corresponding pipeline length plus the activity fault plane width is the total necessary length of pipeline having the strains greater than the allowable strain value. This method can obtain the necessary pipeline length and strain distribution along the pipeline length, also provide the basis of choosing pipes for crossing the active fault.