延性屈服 meaning in English

ductile yield

But setting of strengthened floor will result in the sudden variation of structural stiffness and internal force , and will come into being weal story . the yield mechanism will difficultly " story column , weak beam " and " strong in resistance of shear force , weak in resistance of bending moment "
在风荷载作用下，设置加强层是一种减少结构水平位移的有效方法；但在地震作用下，加强层的设置将会引起结构刚度、内力突变，并易形成薄弱层，结构的损坏机理难以呈现“强柱弱梁”和“强剪弱弯”的延性屈服机制。