緩粘結(jié)預應(yīng)力鋼絞線與混凝土粘結(jié)性能試驗研究
吳轉(zhuǎn)琴,尚仁杰,洪光,夏京亮,寅志強
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吳轉(zhuǎn)琴,尚仁杰,洪光,夏京亮,寅志強(中冶建筑研究總院有限公司,北京 100088)[摘要]緩粘結(jié)預應(yīng)力鋼絞線與混凝土之間的粘結(jié)錨固性能關(guān)系到緩粘結(jié)預應(yīng)力混凝土結(jié)構(gòu)的受力,通過對8個試件的拉拔試驗,研究了緩粘結(jié)預應(yīng)力鋼絞線與混凝土之間的粘結(jié)錨固性能,測得了鋼絞線拉力與滑移量之間的關(guān)系曲線。試驗證明,緩粘結(jié)鋼絞線外包護套的橫肋高度直接影響到緩粘結(jié)鋼絞線與混凝土之間的粘結(jié)性能,橫肋越高,鋼絞線從混凝土試件中拔出的拉拔力越大,粘結(jié)性能越好。試驗結(jié)果對緩粘結(jié)鋼絞線的制作和緩粘結(jié)預應(yīng)力混凝土結(jié)構(gòu)設(shè)計和工程應(yīng)用提供參考。[關(guān)鍵詞]緩粘結(jié)預應(yīng)力鋼絞線; 粘結(jié)錨固性能; 拉拔試驗中圖分類號:TU378.8 文獻標識碼:A 文章編號:1002-848X(2013)02-0068-03Experimental study on cohesive property between retardbonded prestressing steel strand and concreteWu Zhuanqin, Shang Renjie, Hong Guang, Xia Jingliang, Yin Zhiqiang( Central Research Institute of Building and Construction, MCC Group Co., Ltd., Beijing100088, China)Abstract: The cohesive anchorage property between retard-bonded prestressing steel strand and concrete is important to the retard-bonded prestressed concrete structure. The pull-out experiments of 8 test specimens were carried out to study the cohesive anchorage property of retard-bonded prestressing steel strand, and the curves of load versus slide displacement were obtained. It is shown that the cohesive anchorage property is affected by the height of the transverse rib directly. The higher the transverse rib is, the larger the pull\|out force would be. The study provides a reference for the fabrication of the retard-bonded prestressing steel strand and the design of the retard-bonded prestressed concrete structure.Keywords: retard-bonded prestressing steel strand; cohesive anchorage property; pull-out experiment參考文獻[1] 陶學康. 21世紀的混凝土及預應(yīng)力混凝土新技術(shù)——國際結(jié)構(gòu)混凝土協(xié)會第一屆大會有關(guān)內(nèi)容介紹[J]. 施工技術(shù),2003,32(7):1-5.[2] 李佩勛. 緩粘結(jié)預應(yīng)力綜合技術(shù)的研究和發(fā)展[J]. 工業(yè)建筑,2008,38(11):1-5.[3] 熊小林. 緩粘結(jié)預應(yīng)力體系施工工藝研究[D]. 南京:東南大學,2006.[4] 忻鼎康,張燕平,胡祖光. 緩凝型預應(yīng)力應(yīng)用技術(shù)研究[R].上海:上海建科預應(yīng)力技術(shù)工程有限公司,2006.[5] 徐有鄰,劉立新,管品武,等. 環(huán)氧樹脂涂層鋼筋錨固性能及設(shè)計方法[J]. 水運工程,1999,307(8):33-37.