日本无卡码高清免费视频V

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預應力鋼絞線千斤頂伸長值
日期:【2017-09-08 11:36】來源:天津市瑞通預應力鋼絞線有限公司 閱讀次數:【】次 作者:預應|應力|力鋼|鋼絞|絞線|線千|千斤|斤頂|頂伸|伸長|長值|值

 預應力鋼絞線按此可計算30%和100%時的伸長值。根據規范,預應力鋼絞線的伸長值的計算式是100%千斤頂伸長值-2X15%千斤頂伸長值+30%千斤頂伸長值
我碰到的情況是12孔預應力鋼絞線長200m,預估計15%千斤頂伸長值是多少,30%是多少,還有100%? 
張拉到15% 可定經由多次倒頂,所以無法預估。 
《公路橋涵施工技術規范》(JTJ041-2000)第129頁有理論伸長值計算公式。 
按計算理論伸長值的方法,張拉力取值按15%計,則可計算出15%時的張拉伸值。

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日本无卡码高清免费视频V
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