The formula is suitable for most engineering cast which consist of three disposal styles of tension rod - level tension rod , one break point strut - framed tension rod , two break points strut - framed tesion rod , and consider the boundary condition ' s effect on the strengthening . its application also is convenience 此公式包容了現(xiàn)今預(yù)應(yīng)力法加固工程中多采用的三種拉桿布置型式? ?水平式拉桿、下?lián)问揭徽埸c(diǎn)拉桿、下?lián)问絻烧埸c(diǎn)拉桿,并考慮到邊界條件對(duì)加固所產(chǎn)生的影響,具有簡(jiǎn)便易用,適用面廣的特點(diǎn)。