傳統(tǒng)風(fēng)格鋼筋混凝土梁-柱節(jié)點抗剪機理分析與抗剪承載力計算*
謝啟芳1,2,李朋1,王龍1,隋?1
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(1 西安建筑科技大學(xué)土木工程學(xué)院, 西安 710055;2 華南理工大學(xué)亞熱帶建筑科學(xué)國家重點實驗室, 廣州 510640)[摘要]結(jié)合傳統(tǒng)風(fēng)格鋼筋混凝土梁-柱中節(jié)點的低周反復(fù)荷載試驗結(jié)果,分析了傳統(tǒng)風(fēng)格鋼筋混凝土梁-柱節(jié)點的受力機理及影響節(jié)點抗剪承載力的主要因素。結(jié)果表明:傳統(tǒng)風(fēng)格鋼筋混凝土梁-柱節(jié)點受力機理及抗剪承載力與常規(guī)梁柱節(jié)點有顯著區(qū)別,其開裂荷載及抗剪承載能力大小主要取決于下核心區(qū)強度;節(jié)點抗剪承載力主要影響因素為混凝土強度、節(jié)點體積配箍率、軸向力及上、下梁間距。基于抗剪機理分析及主要影響因素分析,提出了傳統(tǒng)風(fēng)格鋼筋混凝土梁-柱節(jié)點的開裂荷載和抗剪承載力的計算公式,根據(jù)試驗結(jié)果確定了相關(guān)系數(shù)。研究成果可為該類結(jié)構(gòu)的工程實踐提供參考。[關(guān)鍵詞]傳統(tǒng)風(fēng)格現(xiàn)代建筑; 鋼筋混凝土梁-柱節(jié)點; 抗剪機理; 開裂荷載; 抗剪承載力中圖分類號:TU375.4 文獻(xiàn)標(biāo)識碼:A 文章編號:1002848X(2014)19-0081-06Shear mechanism analysis and shear capacity calculation of the RC column-beam joint built in traditional styleXie Qifang1,2 , Li Peng1, Wang Long1, Sui Yan1(1 School of Civil Engineering, Xi′an University of Architecture and Technology, Xi′an 710055, China; 2 State Key Laboratory of Subtropical Building Science, South China University of Technology, Guangzhou 510640, China)Abstract:The mechanical behavior and the main factors of the shear capacity of the RC column-beam joint built in traditional style were analyzed based on the results of low cyclic loading test conducted on the RC column-beam joint built in traditional style. The results show that the mechanical behavior and shear capacity of the RC column-beam joint built in traditional style have significant difference with that of the ordinary beam-column joint. The crack load and shear capacity of the RC column-beam joint built in traditional style mainly depend on the strength of the lower core. The main factors of the shear capacity are the concrete strength, stirrup volume ratio of the joint, axial load and the space between up and low beams. Based on the shear mechanism and the main factors of shear capacity analysis, the formulas for crack load and shear capacity of the RC column-beam joint built in traditional style were put forward, and the correlation coefficients were determined according to the test results. The research results can provide reference for engineering practice of this kind of structure.Keywords:modern architecture built in traditional style; RC beam-column joint; shear mechanism; crack load; shear capacity*國家自然科學(xué)基金項目(51208411),陜西省青年科技新星項目(2013KJXX-56),亞熱帶建筑科學(xué)國家重點實驗室開放課題(2014KA05),西安市科技計劃項目(CX1262④)。作者簡介:謝啟芳,博士,副教授,Email:nacy.xie@163.com。參考文獻(xiàn)[1]張?zhí)m香. YJGF 47—2002大型仿古建筑混凝土結(jié)構(gòu)構(gòu)架施工工法[J]. 施工技術(shù), 2005, 34(3): 80-83.[2]謝永良. 鋼筋混凝土仿古建筑結(jié)構(gòu)施工技術(shù)[J]. 建筑施工, 2005, 27(10):57-60.[3]張明. 九華山回香閣萬佛塔結(jié)構(gòu)動力分析[D]. 太原:太原理工大學(xué), 2005.[4]張宣關(guān),薛永武,武云飛. 法門寺合十舍利塔鋼骨結(jié)構(gòu)施工應(yīng)力測試與研究[J].施工技術(shù), 2010, 39(S1): 266-269.[5]王宏旭,周華新,董歡濤,等. 天人長安塔鋼混組合結(jié)構(gòu)應(yīng)用技術(shù)[J]. 施工技術(shù), 2011, 40(2):31-33.[6]王其均. 中國建筑圖解詞典[M]. 北京:機械工業(yè)出版社,2006.[7]框架節(jié)點專題研究組.低周反復(fù)荷載作用下鋼筋混凝土框架梁柱節(jié)點核心區(qū)的受力性能[J].建筑結(jié)構(gòu),1983,13(6):14-19.[8]白國良,李紅星,朱佳寧. 鋼筋混凝土框架異型節(jié)點抗震性能試驗研究[J]. 建筑結(jié)構(gòu)學(xué)報, 2004, 25(4): 8-14.[9]趙鴻鐵.鋼筋混凝土梁柱節(jié)點的抗裂性[J]. 建筑結(jié)構(gòu)學(xué)報, 1990, 11 (12):38-48.[10]劉瑛, 馬樂為. 七個足尺加固節(jié)點的抗裂強度試驗分析[J]. 工業(yè)建筑, 1999, 29(6):55-57.[11]薛偉辰,劉文如.鋼筋混凝土圓柱節(jié)點抗裂度和抗剪強度計算[J].四川建筑科學(xué)研究,1996,22(4):2-7.[12]鄭七振,魏林. 鋼纖維混凝土框架節(jié)點抗剪承載力的試驗研究與機理分析[J].土木工程學(xué)報,2005, 38(9): 89-93.[13]馬克儉,柳炳康,黃慎江. 鋼筋混凝土框架梁柱偏心節(jié)點抗剪承載力計算[J]. 工程力學(xué),1999,16(A02):37-42.[14]唐九如.鋼筋混凝土框架節(jié)點抗震[M]. 南京:東南大學(xué)出版社,1989.