cross-section curvature ductility 基本例句 截面曲率延性 Principle of energy is used to study the moment redistribution and the section curvature ductility in reinforced and prestressed concrete continuous beams.本文采用能量法对普通钢筋混凝土连续梁和预应力混凝土连续梁的弯矩调幅与截面曲率延性之间的关系进行了研究。