- 摘 要
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（1 中國建筑設(shè)計研究院，北京 100044；2 北京萬年基業(yè)建設(shè)投資有限公司，北京 100071）
［摘要］工程設(shè)計中，多層或高層房屋端部常遇到懸挑梁結(jié)構(gòu)，懸挑跨度達到4,5m甚至6m以上。當作用較大活荷載或墻載時，采用普通鋼筋混凝土懸挑梁結(jié)構(gòu)，梁截面高度較大，即使增大配筋量，裂縫寬度仍難滿足規(guī)范限值，造成結(jié)構(gòu)耐久性降低，影響結(jié)構(gòu)安全，此時采用預(yù)應(yīng)力懸挑梁結(jié)構(gòu)是最合理的結(jié)構(gòu)方案。介紹適合手算的預(yù)應(yīng)力懸挑梁設(shè)計計算方法和施工詳圖構(gòu)造，供設(shè)計參考。
［關(guān)鍵詞］懸挑梁； 預(yù)應(yīng)力； 配筋； 承載力； 撓度
中圖分類號：TU378文獻標識碼：A文章編號：1002-848X(2018)04-0010-07
Design method of bonded post-tensioned prestressed cantilever beam
Yu Zhenzhou1, Yu Mingjiang2
(1 China Architecture Design & Research Group, Beijing 100044, China; 2 Beijing Vanion Construction & Investment (Group) Co., Ltd., Beijing 100071, China)
Abstract:In engineering design, cantilever beam structure is common at the end of multi-story or high-rise housing structure, with cantilever span of 4m, 5m or even 6m above. When the large live load or wall load is exerted, the use of ordinary reinforced concrete cantilever beam structure leads to large beam section height. Even if the amount of reinforcement is increased, the crack width is still difficult to meet the code limits, resulting in decreased durability of the structure and affecting the structural safe. The prestressed cantilevered beam structure is the most reasonable structural scheme. The design calculation methods and construction details of prestressed cantilevered beams suitable for hand computation were introduced for the reference of design.
Keywords:cantilever beam; prestress; reinforcement; bearing capacity; deflection
作者簡介：于振洲，本科，高級工程師，一級注冊結(jié)構(gòu)工程師，Email:yzhzhgshw@163.com。
