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(1 浙江工業(yè)大學(xué)建筑規(guī)劃設(shè)計(jì)研究院有限公司，杭州 310014； 2 浙江工業(yè)大學(xué)建筑工程學(xué)院，杭州 310014)

［摘要］通過(guò)對(duì)不同齡期新澆筑混凝土柱施加不同地震加速度作用的試驗(yàn)，以模擬新澆筑鋼筋混凝土結(jié)構(gòu)構(gòu)件受地震作用后的影響。研究發(fā)現(xiàn)，處于早齡期的混凝土柱在地震作用下產(chǎn)生自上而下的水平裂縫，裂縫位置在柱箍筋位置附近，且越接近柱端，裂縫越寬。齡期在48h以后的混凝土柱在受到地震擾動(dòng)下，柱身和柱根均未見(jiàn)明顯水平裂縫。通過(guò)超聲波探傷表明，內(nèi)部損傷與外觀裂縫具有緊密的聯(lián)系，齡期越短，內(nèi)部損傷越為嚴(yán)重，且越靠近柱根，內(nèi)部損傷越明顯。

［關(guān)鍵詞］早齡期混凝土；余震；振動(dòng)臺(tái)試驗(yàn)；超聲波探傷

中圖分類(lèi)號(hào)：TU528文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2011)03-0072-03Cracks and internal damage analysis of early-age concrete columns under aftershock

Ying Yimiao¹, Yang Junjie², Chen Xiong², Zhou Xiaoyue¹, Zhang Xuefeng¹

(1 Architectural and Planning Design & Research Institute Co., Ltd of Zhejiang University of Technology, Hangzhou 310014,

China; 2 College of Civil Engineering and Architecture, Zhejiang University of Technology, Hangzhou 310014, China)

Abstract:Through the test of exerting different seismic acceleration on the new pouring concrete columns of different ages, the influence of the new cast reinforced concrete structure members under earthquake was simulated. The results show that some horizontal cracks are appeared from the top to the bottom of the early-age concrete columns under earthquake, and the positions of the cracks are near the stirrups. The closer to the end of the columns, the wider the cracks will be. There are no obvious horizontal cracks on the body and the root of the 48hage concrete columns which subject to seismic disturbance. The ultrasonic flaw detection shows that the internal damage is closely related with the cracks on the surface of the column. The shorter the age is, the more serious the internal damage will be, and the closer to the root of the column, the more obvious the internal damage will be.

Keywords:earlyage concrete; aftershock; shaking table test; ultrasonic flaw detection

*浙江省科技廳資助項(xiàng)目“余震作用下混凝土結(jié)構(gòu)施工技術(shù)研究”（2009C16076）。

作者簡(jiǎn)介：應(yīng)義淼，高級(jí)工程師，一級(jí)注冊(cè)結(jié)構(gòu)工程師，Email:gdyym@126.com。

參考文獻(xiàn)

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［2］HANNA M M, FARIS A M. The effect of thick concrete cover on the maximum flexural crack width under service load［J］. ACI Structural Journal,1996,93(3):257-265.

［3］李士偉，林維正，李少波，等.混凝土損傷的超聲檢測(cè)試驗(yàn)研究［J］，無(wú)損檢測(cè)，2004，26(3)：127-128，141.