Basic theory of elasticity

Based on the basic theory of elasticity , the fundamental equation of steel tubular members filled with centrifugal concrete under torsion stress is presented ;

采用弹性力学的基本分析方法，建立了离心钢管混凝土构件扭转作用的基本方程。

Based on the basic theory of elasticity and thermodynamics , a method for calculating opti-mal slope shape and rational slope angle is proposed . Then , an equation for optimal slope shape is ob-tained .

基于弹性力学和热力学的基本理论，分析了最佳边坡形状和合理边坡角的计算方法，并得出最佳边坡形状方程。