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任利民¹，盛  超²
（1南京新街口百貨商店股份有限公司，南京210005; 2 南京工業(yè)大學(xué)鑒定與加固中心，南京210009）

[摘要] 為了解決既有高層建筑結(jié)構(gòu)增設(shè)大跨度懸挑梁所面臨的問題，采用了體內(nèi)外同索預(yù)應(yīng)力技術(shù)進(jìn)行懸挑梁設(shè)計(jì)，不僅提高了懸挑梁根部的抗裂性，而且還對既有結(jié)構(gòu)邊跨梁端負(fù)彎矩區(qū)實(shí)現(xiàn)了加固。本文結(jié)合工程實(shí)例探討了體內(nèi)外同索預(yù)應(yīng)力技術(shù)進(jìn)行大跨懸挑梁的設(shè)計(jì)和計(jì)算方法。實(shí)踐證明，本文方法是切實(shí)可行的，并具有一定的優(yōu)越性。
[關(guān)鍵詞]  體內(nèi)外同索；索梁分載法；懸挑梁；加固改造

Application of Same Tendon in Internality and Externality Prestressed in High-rise Building Strengthen
Ren Limin¹, Sheng Chao²
(1Nanjing Xinjiekou Department Store Co.,  Ltd. , Nanjing 210008, China; 2 Center of Identification and strengthening, Nanjin University of Technology,  Nanjing 210009, China)

Abstract: In order to solve the existing high-rise building additional large-span cantilevered beam facing the question of the use of same tendon in internality and externality prestressed technology for cantilevered beam design, not only improve the cantilevered beam crack roots,  but also on both the structure of cross-border negative moment beam reinforced zones. In this paper, combined with engineering examples show that the same tendon in internality and externality prestressed technology for large-span cantilevered beam design and calculation methods. Practice has proved that this method is practical and superiority.
Keywords: same tendon in internality and externality; loading method distribution to cable-beam; cantilevered beam; Strengthening and retrofit