地震作用下早齡期鋼筋混凝土粘結(jié)特性試驗(yàn)研究*
楊俊杰1，戴妙嫻2
- 摘 要
-
楊俊杰1，戴妙嫻2（1 浙江工業(yè)大學(xué)建筑工程學(xué)院， 杭州 310014； 2 杭州市運(yùn)河綜合保護(hù)開(kāi)發(fā)建設(shè)集團(tuán)， 杭州 310005）［摘要］新澆筑的早齡期混凝土結(jié)構(gòu)受到地震作用后鋼筋與混凝土間產(chǎn)生相對(duì)變形，尤其是預(yù)留鋼筋隨地震作用的甩動(dòng)，會(huì)導(dǎo)致鋼筋與混凝土間粘結(jié)特性改變。通過(guò)終凝初期(12h)混凝土與鋼筋受地震作用（峰值加速度分別為0.45g，0.25g，0.15g，0.06g，0.00g）的模擬試驗(yàn)，探討了鋼筋甩動(dòng)使混凝土表面產(chǎn)生空穴的機(jī)理和形態(tài)、受振動(dòng)后鋼筋沿錨固長(zhǎng)度的應(yīng)變分布與粘結(jié)應(yīng)力變化關(guān)系、早齡期混凝土在受振后粘結(jié)應(yīng)力損失的規(guī)律等。研究結(jié)果表明：空穴的大小與振動(dòng)力大小相關(guān)，且會(huì)影響鋼筋與混凝土的粘結(jié)應(yīng)力分布形態(tài)，使有效錨固長(zhǎng)度減小。［關(guān)鍵詞］早齡期混凝土； 地震作用； 粘結(jié)特性； 試驗(yàn)研究中圖分類(lèi)號(hào)：TU375 文獻(xiàn)標(biāo)識(shí)碼：A 文章編號(hào)：1002-848X(2013)08-0054-04Experimental study on bond behavior of early-age reinforced concrete under earthquake actionYang Junjie1, Dai Miaoxian2(1 College of Civil Engineering and Architecture, Zhejiang University of Technology, Hangzhou 310014, China; 2 Hangzhou Canal Protection and Development Construction Group, Hangzhou 310005, China)Abstract:The relative deformation between reinforced bars and concrete would be present in the early-age concrete under the earthquake action, especially with the reinforced bars swinging, the change of bond behavior between reinforced bars and concrete would happen. Simulative experiments of the early-age reinforced concrete (12h) under different degrees of seismic actions(0.45g, 0.25g, 0.15g, 0.06g and 0.00g) were carried out. The mechanism and formation of the gaps in early-age concrete associated with swinging actions of reinforced bars, the stress-strain relationship along the anchorage length, and the loss of bond stress after vibration were investigated. The results show that the scale of gap relates to the seismic forces, changes the distribution of bond stresses, and reduces the effective anchorage length.Keywords: early-age reinforced concrete; earthquake action; bond behavior; experimental study*浙江省重大科技項(xiàng)目資助（2010C13012）。作者簡(jiǎn)介：楊俊杰，碩士，教授，Email:yjnjie@163.com。參考文獻(xiàn)［1］金賢玉，錢(qián)春，錢(qián)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.［2］金臻麗，楊俊杰，應(yīng)義淼，等.余震作用下早齡期混凝土強(qiáng)度及損傷試驗(yàn)［J］. 建筑結(jié)構(gòu)，2011，41(3):69-71.［3］戴妙嫻，楊俊杰，應(yīng)義淼，等.余震作用下早齡期混凝土握裹力試驗(yàn)［J］. 建筑結(jié)構(gòu)，2011，41(3):75-77.［4］GB 50152—92混凝土結(jié)構(gòu)試驗(yàn)方法標(biāo)準(zhǔn)［S］.北京：中國(guó)建筑工業(yè)出版社，1992.［5］鄭曉燕. 銹蝕鋼筋與混凝土動(dòng)態(tài)粘結(jié)性［D］.南京：河海大學(xué)，2004：3-13.
- 下載地址
-
你還沒(méi)注冊(cè)？或者沒(méi)有登錄？這篇論文要求至少是本站的注冊(cè)會(huì)員才能閱讀！
如果你還沒(méi)注冊(cè)，請(qǐng)趕緊點(diǎn)此注冊(cè)吧！
如果你已經(jīng)注冊(cè)但還沒(méi)登錄，請(qǐng)趕緊點(diǎn)此登錄吧！
