运用波动的经典理论，提出了导波在金属杆嵌入层“变截面”传播时波速改变的“等效弹性模量”的概念。
Applying classical wave theory, a concept of equivalent elastic modulus on propagation speed modification of guided wave through "variable cross-section" of metal bar embeded layer was put forward.
构件预应力局部影响区与混凝土弹性模量，梁截面尺寸等因素有关。
The part influencing area of prestressing force is related to such factors as concretes elastic ratio, beams sectional dimension and so on.
将组合梁中混凝土翼缘板厚度按弹性模量之比换算，并保持宽度不变形成等效截面。
We put the concrete flange plate of the composite beam into the steel ones according to the elastic modulus ratio and keep the width of section unchanged, as a result, get a equivalent section.
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