預(yù)應(yīng)力型鋼混凝土框架梁彎矩調(diào)幅系數(shù)影響因素分析*
高峰1，2,熊學(xué)玉3，張少紅4
- 摘 要
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(1 濟(jì)南大學(xué)土木建筑學(xué)院，濟(jì)南 250022；2 濟(jì)南大學(xué)工程結(jié)構(gòu)與健康監(jiān)測研究所，濟(jì)南 250022；3 同濟(jì)大學(xué)土木工程學(xué)院建筑工程系，上海 200092；4 山東省工程建設(shè)標(biāo)準(zhǔn)定額站，濟(jì)南 250001)［摘要］采用ABAQUS非線性有限元分析方法，分析了預(yù)應(yīng)力度、有效預(yù)應(yīng)力、預(yù)應(yīng)力筋反彎點(diǎn)長度與線形、含鋼率及截面相對(duì)受壓區(qū)高度等因素對(duì)預(yù)應(yīng)力型鋼混凝土框架梁彎矩調(diào)幅系數(shù)的影響。研究表明：預(yù)應(yīng)力度、含鋼率及截面相對(duì)受壓區(qū)高度對(duì)預(yù)應(yīng)力型鋼混凝土框架梁彎矩調(diào)幅系數(shù)影響較顯著，隨著預(yù)應(yīng)力度、截面相對(duì)受壓區(qū)高度的降低及含鋼率的增加，彎矩調(diào)幅系數(shù)增大；預(yù)應(yīng)力筋的有效預(yù)應(yīng)力、預(yù)應(yīng)力筋反彎點(diǎn)長度與線形的變化可以改變框架梁次彎矩，從而對(duì)框架梁彎矩調(diào)幅系數(shù)產(chǎn)生影響。通過對(duì)彎矩調(diào)幅系數(shù)的分析，建議預(yù)應(yīng)力度λ不宜大于0.6，經(jīng)濟(jì)合理含鋼率為5%左右，截面相對(duì)受壓區(qū)高度不宜大于0.32。［關(guān)鍵詞］預(yù)應(yīng)力; 型鋼混凝土; 框架梁; 內(nèi)力重分布; 彎矩調(diào)幅中圖分類號(hào)：TU378.4 文獻(xiàn)標(biāo)識(shí)碼：A 文章編號(hào)：1002-848X(2015)05-0080-06Influence factors analyses on moment modulation coefficient of prestressed steel reinforced concrete frame beamGao Feng1,2, Xiong Xueyu3, Zhang Shaohong4(1 School of Civil Engineering and Architecture, University of Jinan, Jinan 250022, China; 2 Institute of Civil Engineering and Health Monitoring, University of Jinan, Jinan 250022, China; 3 Department of Building Engineering, College of Civil Engineering, Tongji University, Shanghai 200092,China; 4 Engineering Construction Standards Quota Station of Shandong Province , Jinan 250001, China )Abstract: Using nonlinear finite element analysis method with ABAQUS, influences of factors on the moment redistribution coefficient of prestressed steel reinforced concrete frame beams were researched, including the prestressing degree, effective prestressing, inflection point length and linearity of prestressing tendon, steel ratio and relative height of compression zone. The research shows that the effects of the prestressing degree, steel ratio and relative height of compression zone are remarkable, while the moment redistribution coefficient increases as the decrease of prestressing degree and relative height of compression zone and the increase of steel ratio. Secondary moment of frame beams are decided by the effective prestressing, inflection point length and linearity of prestressing tendon，which impacts on the moment redistribution coefficient of the frame. Based on the analysis on moment redistribution coefficient, some proposals were put forward, including prestressing degree λ should not be greater than 6%，reasonable steel ratio is about 5% and relative height of compression zone should not be more than 0.32.Keywords: prestressing; steel reinforced concrete; frame beam; internal force redistribution; moment modulation*住房和城鄉(xiāng)建設(shè)部研究開發(fā)項(xiàng)目（2014-K2-029），山東省住房城鄉(xiāng)建設(shè)科學(xué)技術(shù)計(jì)劃項(xiàng)目（KY027），國家自然科學(xué)基金資助項(xiàng)目(51178328)。作者簡介：高峰，博士，講師，Email：gaofenglike@163.com。參考文獻(xiàn)［1］熊學(xué)玉，高峰.預(yù)應(yīng)力型鋼混凝土框架試驗(yàn)研究及分析［J］.四川大學(xué)學(xué)報(bào):工程科學(xué)版，2011,43（6）：1-8.［2］高峰,熊學(xué)玉.預(yù)應(yīng)力型鋼混凝土框架結(jié)構(gòu)豎向反復(fù)荷載作用下抗震性能試驗(yàn)研究［J］.建筑結(jié)構(gòu)學(xué)報(bào),2013,34(7): 62-71.［3］熊學(xué)玉，高峰，蘇小卒.預(yù)應(yīng)力型鋼混凝土框架試驗(yàn)研究和設(shè)計(jì)理論［J］.湖南大學(xué)學(xué)報(bào)：自然科學(xué)版,2012,39（8）:19-26.［4］王鈞，鄔丹，鄭文忠.預(yù)應(yīng)力H型鋼混凝土簡支梁正截面受力性能試驗(yàn)［J］.哈爾濱工業(yè)大學(xué)學(xué)報(bào)：自然科學(xué)版，2009，41(6):22-27.［5］傅傳國，李玉瑩，梁書亭.預(yù)應(yīng)力型鋼混凝土簡支梁受彎性能試驗(yàn)研究［J］.建筑結(jié)構(gòu)學(xué)報(bào)，2007，28（3）：62-73.［6］鄭文忠，王鈞，韓寶權(quán)，等.內(nèi)置H型鋼預(yù)應(yīng)力混凝土連續(xù)組合梁受力性能試驗(yàn)研究［J］.建筑結(jié)構(gòu)學(xué)報(bào)，2010，31(7):23-31.［7］熊學(xué)玉，高峰.預(yù)應(yīng)力型鋼混凝土框架彎矩調(diào)幅試驗(yàn)研究［J］.華中科技大學(xué)學(xué)報(bào)：自然科學(xué)版,2012,40（11）：1-5.［8］JEEHO LEE, GREGORY L FENVES. Plastic-damage model for cyclic loading of concrete structures［J］. Journal of Engineering Mechanics, 1998，124（8）：892-900.［9］HU HUANTIE, LIN FUMING, JAN YINYUAN. Nonlinear finite element analysis of reinforced concrete beams strengthened by fiber-reinforced plastics［J］. Composite Structures, 2004, 63(2):271-281.［10］雷拓，錢江，劉成清.混凝土損傷塑性模型應(yīng)用研究［J］.結(jié)構(gòu)工程師，2008，24(2):22-27.［11］GB 50010—2010 混凝土結(jié)構(gòu)設(shè)計(jì)規(guī)范［S］.北京:中國建筑工業(yè)出版社，2011.［12］李紅.型鋼與混凝土粘結(jié)性能的試驗(yàn)研究［D］.西安:西安建筑科技大學(xué),1995.
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