C40早齡期鋼筋混凝土偏壓柱受力性能試驗(yàn)研究*
王冬雁1，楊振坤2，吳岳剛2，王夢(mèng)夢(mèng)2，袁泉2，林冰1，廖娟1
- 摘 要
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（1 中國(guó)建筑股份有限公司技術(shù)中心， 北京 101300；2 北京交通大學(xué)土木建筑工程學(xué)院， 北京 100044）［摘要］為了研究C40早齡期鋼筋混凝土偏壓柱靜力性能，對(duì)5根不同齡期（1，3，7，28，90d）時(shí)C40鋼筋混凝土偏壓柱進(jìn)行了單調(diào)靜力加載試驗(yàn)。主要研究了不同齡期時(shí)C40鋼筋混凝土偏壓柱的承載能力、破壞形態(tài)、變形特性、鋼筋與混凝土共同工作性能。研究結(jié)果表明：混凝土早齡期（7d前）對(duì)試件的承載能力、破壞特征、變形特征、鋼筋與混凝土共同工作性能有不同影響，并與混凝土在各種性能指標(biāo)中的參與程度密切相關(guān)；極限承載力隨齡期增長(zhǎng)呈非線(xiàn)性增長(zhǎng)，前7d增長(zhǎng)較快，7d后增速變緩；對(duì)于破壞形態(tài)、變形特性，3d以前試件差異較大，3d以后試件與28d試件相似；鋼筋與混凝土共同工作性能在3d齡期前較差，3d齡期以后二者共同工作性能增強(qiáng)，混凝土與鋼筋間粘結(jié)強(qiáng)度較大，變形能力趨于一致。［關(guān)鍵詞］早齡期鋼筋混凝土柱; 偏心受壓; 試驗(yàn)研究; 受力性能中圖分類(lèi)號(hào)：TU375.3 文獻(xiàn)標(biāo)識(shí)碼：A 文章編號(hào)：1002-848X(2013)21-0058-05Experimental study on behavior of C40 RC eccentric compressive columns of early-ageWang Dongyan1, Yang Zhenkun2, Wu Yuegang2, Wang Mengmeng2, Yuan Quan2, Lin Bing1, Liao Juan1(1 Technical Center of China State Construction Engineering Co., Ltd., Beijing 101300, China; 2 School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China)Abstract: In order to study the behavior of C40 reinforced concrete（RC）eccentric compressive columns of early-age, five C40 RC eccentric compressive columns in different age（1,3,7,28,90d）were experimented under static load. The bearing capacities, failure characteristics, deformation features, co-working properties of rebar and concrete were obtained from the test under the consideration of curing-age. The test shows that the concrete in early age (7d ago) has different effects on the bearing capacities, failure characteristics, deformation features, co-working properties of rebar and concrete of the specimens, which closely relates with levels of concrete participation in a variety of performance indicators. Ultimate strength is nonlinear growth with age, the rate before 7d is much quicker than after 7d; the failure characteristics, deformation features are similar to the specimens of 28d. The co-working properties of rebar and concrete are poor before 3d, but after 3d the bond strength becomes greater and then the co-working properties of rebar and concrete are very good and deformations are consistent.Keywords: early-age reinforced concrete column; eccentric compressive; experimental study; mechanical behavior*中建科技項(xiàng)目（CSCEC-2010-Z-02），國(guó)家科技支撐計(jì)劃（2006BAJ01B04）。作者簡(jiǎn)介：王冬雁，博士，高級(jí)工程師，Email: wangdongyan@cscec.com。參考文獻(xiàn)［1］GB 50204—2002混凝土結(jié)構(gòu)工程施工質(zhì)量驗(yàn)收規(guī)范［S］. 北京：中國(guó)建筑工業(yè)出版社，2011.［2］金賢玉，田野，金南國(guó). 混凝土的早齡期性能與裂縫控制［J］. 建筑結(jié)構(gòu)學(xué)報(bào)，2010, 31(6): 205-212.［3］OLUOKUN FRANCIS A, BURDETTE EDWIN G, DEATHERIDGE J HAROLD, et al. Early-age concrete strength prediction by maturity—another look［J］.ACI Material Journal，1990，87（6）：565-572.［4］SLATNICK SAM,RIDING KYLE A,FOLLIARD KEVIN J,et al. Evaluation of autogenous deformation of concrete at early ages［J］. ACI Materials Journal，2011，108(1)：21-28.［5］應(yīng)義淼，楊俊杰，陳雄，等. 余震作用下早齡期鋼筋混凝土柱裂縫及內(nèi)部損傷分析［J］.建筑結(jié)構(gòu)，2011,41（3）：72-74.［6］GB/T 50081—2002 普通混凝土力學(xué)性能試驗(yàn)方法標(biāo)準(zhǔn)［S］. 北京: 中國(guó)建筑工業(yè)出版社，2003.［7］過(guò)鎮(zhèn)海. 鋼筋混凝土原理［M］. 北京：清華大學(xué)出版社，1999.
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