对有限元软件MARC进行了二次开发，实现混凝土有限元网格的各种材质单元的材料参数的自动识别及赋值，三维数值模拟结果的较直观显示等。

The second development of FEM software-MARC was studied to identify and assign the different material property of elements automatically and display the three-dimensional simulation result.

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研究结果显示当模拟单元的尺寸较小时。

Numerical results show that the finite size effect is really exists.

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