span of cognition 中文意思是什麼
span of cognition
解釋
認知廣度-
For example, the large friction loss of prestressed tendons, complex anchorage bearing joint, the problem of cracks in large area structure, axial compress of long span continuous beam under prestress. all those hinder its use in long span structure. until now days, the cognition about the behavior of such structure under loads is not enough for the realm of prestressed concrete of all the world
但是，預應力技術應用於大跨連續框架結構，在設計和施工中還存在一些缺點和不足，例如預應力筋的摩擦損失過大，節點錨固區設計和構造復雜、大面積結構的裂縫控制問題、大跨框架梁在預應力作用下的軸向縮短等，這些都是困擾大跨預應力混凝土框架結構應用的突出問題，特別是目前對于預應力混凝土超靜定結構的受力性能，國內外預應力界的認識尚不夠全面。
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