約束高強(qiáng)混凝土的基本關(guān)系研究
同 盈,梁興文
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約束高強(qiáng)混凝土的基本關(guān)系研究同 盈,梁興文(西安建筑科技大學(xué)土木工程學(xué)院,西安 710055)[摘要] 基于83個約束高強(qiáng)混凝土試件的試驗數(shù)據(jù),分別分析了箍筋間距、體積配箍率、箍筋強(qiáng)度、混凝土強(qiáng)度對約束高強(qiáng)混凝土的峰值應(yīng)力、峰值應(yīng)變和極限應(yīng)變的影響。結(jié)果表明,配箍特征值綜合反映了上述因素的影響,是最主要的影響因素。建立了約束高強(qiáng)混凝土的峰值應(yīng)力、峰值應(yīng)變、極限應(yīng)變與配箍特征值之間的關(guān)系。[關(guān)鍵詞] 約束高強(qiáng)混凝土;配箍特征值;峰值應(yīng)力;峰值應(yīng)變;極限應(yīng)變中圖分類號:TU375.02,TU528.01文獻(xiàn)標(biāo)識碼:A文章編號:1002-848X(2011)01-0077-02Study on the basic relationship of confined high-strength concreteTong Ying, Liang Xingwen(College of Civil Engineering, Xian University of Architecture and Technology, Xian 710055, China)Abstract:According to the experimental results of 83 confined high-strength concrete specimens, the influences of stirrup spacing, volume stirrup ratio, stirrup strength, concrete strength on peak stress, peak strain and ultimate strain of confined high-strength concrete were analyzed. The results show that confining reinforcement characteristic value is the synthetical reflection of the above-mentioned factors and the most important influencing factor. Taking confining reinforcement characteristic value as a parameter, the relations between peak stress, peak strain, ultimate strain and confining reinforcement characteristic value were respectively established.Keywords:confined high-strength concrete; confining reinforcement characteristic value; peak stress; peak strain; ultimate strain*國家自然科學(xué)基金資助項目(50678149)。作者簡介:同盈,碩士,Email:tongying-218@163.com。參考文獻(xiàn)[1]RICHART F E, BRANDTZAEG A, BROWN R L. A study of the failure of concrete under combined compressive stresses[R]. Urbana:University of Illi-nois at Urbana-champaign, 1928.[2]SOLIMAN M T M,YU C W. The flexural stress-strain relationship of concrete confined by rectangular transverse reinforcement[J]. Magazine of Concrete Research,1967,19(61):223-238.[3]SAATCIOGLU M,RAZVI S R. Strength and ductility of confined concrete[J]. Journal of Structural Engineering, ASCE, 1992,118(6):1590-1607.[4]林大炎,王傳志. 矩形箍筋約束的混凝土應(yīng)力-應(yīng)變?nèi)€性能研究[M]//清華大學(xué)抗震抗爆工程研究室科學(xué)研究報告集. 北京:清華大學(xué)出版社,1980.[5]吳綺蕓. 約束混凝土強(qiáng)度和變形的實驗研究[R]. 中國建筑科學(xué)研究院,1982.[6]胡海濤,葉知滿. 復(fù)合箍筋約束混凝土軸心受壓短柱承載力計算[J].建筑結(jié)構(gòu),2002,32(4):12-13.[7]關(guān)萍,王清湘,趙國藩. 高強(qiáng)約束混凝土應(yīng)力-應(yīng)變本構(gòu)關(guān)系的試驗研究[J]. 工業(yè)建筑,1997,27(11):27-30.[8]胡海濤,葉知滿. 復(fù)合箍筋約束高強(qiáng)混凝土應(yīng)力應(yīng)變性能[J]. 工業(yè)建筑,1997,27(10):23-28.[9]楊坤,史慶軒,王秋維,等. 高強(qiáng)箍筋約束混凝土軸心受壓性能分析[J].西安建筑科技大學(xué)學(xué)報:自然科學(xué)版,2009,41(2):161-172.[10]錢稼茹,程麗榮,周棟梁. 普通箍筋約束混凝土柱的中心受壓性能[J]. 清華大學(xué)學(xué)報:自然科學(xué)版,2002,42(10):1369-1373.[11]李立仁,余瑜,陳永慶. 不同配箍方式的軸壓高強(qiáng)混凝土短柱承載力及延性試驗研究[C]//高強(qiáng)與高性能混凝土及其應(yīng)用專題研討會論文集,1990.[12]SHEIKH S A,UZUMERI S M. Analytical model for concrete confinement in tied columns[J].Journal of the Structural Division, ASCE,1982,108(12):2703-2722.[13]MANDER J B, PRIESTLEY M J N,PARK R. Theoretical stress-strain model for confined concrete[J]. Journal of Structural Engineering, ASCE,1988,114(8):1804-1826.[14]張秀琴,過鎮(zhèn)海,王傳志. 反復(fù)荷載下箍筋約束混凝土的應(yīng)力-應(yīng)變?nèi)€方程[J]. 工業(yè)建筑,1985,15(12):18-22.[15]梁興文,馬樂為,鄧明科. 混凝土結(jié)構(gòu)課程教學(xué)中的若干問題[J]. 建筑結(jié)構(gòu),2008,38(S1):72-74.