采用正交试验，对一种聚氨酯混凝土的材料和配合比进行了选择性研究。
By using orthogonal test method, the selective study on the mixture proportion about a type of polyurethane concrete was processed.
针对此类梁-柱结构推导了梁和柱的材料不同时的正交性条件。
Derived the orthogonality of the beam-column structure when the material of beam different from the material of column in structure.
当上下半平面材料参数相同时，可获得受弯曲载荷正交异性复合材料板裂纹尖端应力场，并利用有限元算例分析验证了理论结果的正确性。
When the upper and the lower half-planes are of the same parameters, the stress field of crack of orthotropic composite materials can be obtained. The derived equation is verified with FEM analysis.
当上下半平面材料参数相同时，可获得受弯曲载荷正交异性复合材料板裂纹尖端应力场，并利用有限元算例分析验证了理论结果的正确性。
When the upper and the lower half-planes are of the same parameters, the stress field of crack of orthotropic composite materials can be obtained. The derived equation is verified with FEM analysis.
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