prestressing jack 中文意思是什麼
prestressing jack
解釋
預應力千斤頂- prestressing : 強壓（拉、扭）處理
- jack : n 1 〈常 J 〉 傑克〈男子名，也作 John 的俗稱或昵稱〉。2 〈J 〉普通人，男子，傢伙，小夥子。3 水手...
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In this test, a special bolt - jack is used to exent of prestressing force to brace angles as the whole structure is under dead - load. in this state brace angles withstand partly load before twice - load and the stress and strain of concrete are decreased. in this way the aim of removal of load and strengthening can be reached
本試驗中採用專用螺栓千斤頂在恆定荷載水平下對混凝土柱角鋼撐桿施加預壓應力，使外包角鋼在二次受力前即分擔部分荷載，使混凝土應力水平和應變水平降低，達到卸載與加固同步進行的目的。 -
Hydraulic jack for prestressing
預應力用液壓千斤頂
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