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(1 浙江工業(yè)大學(xué)建筑工程學(xué)院，杭州 310014； 2 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)

［摘要］汶川地震災(zāi)后重建項(xiàng)目是在不斷發(fā)生的余震中開(kāi)工建設(shè)的，余震是否會(huì)對(duì)在建建筑物造成損傷是共同關(guān)注的問(wèn)題。對(duì)早齡期混凝土試塊模擬不同峰值加速度的振動(dòng)擾動(dòng)，通過(guò)28d的抗壓強(qiáng)度及超聲波波速的比較，研究不同齡期的新澆混凝土受振動(dòng)擾動(dòng)后強(qiáng)度及損傷的變化規(guī)律。試驗(yàn)結(jié)果表明，在剛性模板的試驗(yàn)條件下，新澆混凝土在2d后受振對(duì)后期強(qiáng)度及損傷影響甚微。

［關(guān)鍵詞］早齡期混凝土；余震；抗壓強(qiáng)度；損傷

中圖分類號(hào)：TU528文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2011)03-0069-03

Experimental investigation on strength and damage of early-age concrete subjected to aftershock

Jin Zhenli1, Yang Junjie1, Ying Yimiao2, Zhang Xuefeng2, Zheng Shuguang2

(1 College of Civil Engineering and Architecture, Zhejiang University of Technology, Hangzhou 310014, China; 2 Architectural

and Planning Design & Research Institute Co., Ltd of Zhejiang University of Technology, Hangzhou 310014, China)

Abstract:The reconstructions after Wenchuan Earthquake suffered ongoing aftershock. It was concerned whether the new constructions in process were influenced by aftershock. Early-age concrete was subjected to different earthquake excitations at different ages. The 28 days compressive strength and ultrasonic velocity of specimens were tested and compared with the control samples. The result shows that the influence of aftershock on fresh concrete after two days is little.

Keywords:early-age concrete; aftershock; compressive strength; damage

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：金臻麗，碩士研究生，Email: jinzhenli1985@163.com。

參考文獻(xiàn)

［1］張治泰,邱平.超聲波在混凝土質(zhì)量檢測(cè)中的應(yīng)用［M］.北京:化學(xué)工業(yè)出版社,2006.

［2］樓志文. 損傷力學(xué)基礎(chǔ)［M］. 西安：西安交通大學(xué)出版社,1991.

［3］金賢玉,錢春,錢在茲. 對(duì)早齡期混凝土產(chǎn)生損傷的試驗(yàn)研究與分析［J］.土木工程學(xué)報(bào), 1997, 30(6)：47-51.