The lithology and the weathering degree of the bed rocks are the main factors to determine their physical mechanical properties. 基岩的岩性和風化程度是決定其物理力學性質的王要因素。
RC is a composite material with rebar and concrete that have different physical mechanics characters, and its constitutive relationship is relatively complex. 摘要鋼筋混凝土是由鋼筋和混凝土兩種具有不同物理力學性質的材料組合而成的複合材料，其本構模型比較複雜。
