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試驗(yàn)條件對(duì)鋼筋混凝土銹裂模型影響的研究
鄭曉燕1,吳勝興2
摘 要

(1 南京林業(yè)大學(xué),南京 210037; 2 河海大學(xué),南京 210098)
[摘要]澆注了5個(gè)鋼筋混凝土柱式大試件,養(yǎng)護(hù)三個(gè)月后通過電化學(xué)方法加速其銹蝕,得出了銹脹開裂時(shí)鋼筋的銹蝕率?;陔娀瘜W(xué)銹蝕試驗(yàn)結(jié)果,并結(jié)合已有的試驗(yàn)資料,建立了考慮電化學(xué)銹蝕速度、相對(duì)保護(hù)層厚度及粗鋼筋影響的銹裂模型, 該模型具有較強(qiáng)的通用性。
[關(guān)鍵詞]鋼筋混凝土;鋼筋銹蝕;銹裂模型;電化學(xué)
Study on effect of testing condition on models of corrosioncracking of reinfor
ced concrete
Zheng Xiaoyan1, Wu Shengxing2(1 Nanjing Forestry University,Nanjing 210037, China; 2 Hehai University, Nanjing 210098, China)
Abstract:Five large size column-ype specimens were poured. After being cured for three months, these specimens were under accelerated corrosion by electro chemical method, and the corrosion rate of steel bar at the moment of concrete cracking had been obtained. A new model,which was based on comprehensive analysis of the testing results, was presented,in which, the effect of electrochemical corrosion velocity,large c/d and large diameter re-bar were considered by revision coefficient.The model is of great currency.
Keywords:reinforced concrete; steel corrosion; model of corrosion-cracking; electrochemistry
國家自然科學(xué)基金項(xiàng)目“鋼筋混凝土結(jié)構(gòu)銹裂損傷的參數(shù)識(shí)別與系統(tǒng)仿真評(píng)估”(50079002)。
作者簡介:鄭曉燕,博士,教授,Email:xyzh@njfu.edu.cn。
參考文獻(xiàn)
[1]MOLINA  F J. Cover cracking as affection of bar corrosion: Part ⅡNumerical model[J]. Materials and Structures,1993, 26:932548.
[2]ROBERTS  M B, ATKINS C, et al. A proposed empirical corrosion model for reinforced concrete[J]. Structure and Building,I.C.E,2000, 140:111.
[3]徐善華,牛荻濤,陳新孝. 鋼筋混凝土結(jié)構(gòu)銹脹壽命分析[J].建筑科學(xué), 2002,18(5): 32-35.
[4]淡丹輝.基于模型的鋼筋混凝土構(gòu)件銹蝕裂縫的全過程非線性有限元分析[D]. 西安:西安建筑科技大學(xué),1997.
[5]潘振華,牛荻濤,王慶森.鋼筋銹蝕開裂條件的試驗(yàn)研究[J].工業(yè)建筑,1999,29(5):46-19.
[6]李海波,鄢飛,趙羽習(xí),等.鋼筋混凝土結(jié)構(gòu)開裂時(shí)刻的鋼筋銹脹力模型[J].浙江大學(xué)學(xué)報(bào),2000,34(4):415422.
[7]張偉平.混凝土結(jié)構(gòu)的鋼筋銹蝕損傷預(yù)測及其耐久性評(píng)估[D].上海:同濟(jì)大學(xué),1999.
[8]鄭曉燕. 銹蝕鋼筋與混凝土動(dòng)態(tài)粘結(jié)性能研究[D]. 南京:河海大學(xué),2004.

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