再生混凝土框架结构抗震性能及其评价
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摘要
通过三维6自由度振动台试验,得到再生混凝土框架结构的地震反应。基于实测地震反应的深入分析,发现在同一地震动输入下,各楼层的最大层剪力、最大倾覆力矩沿高度总体上呈递减趋势。随着地震动强度的增加,各楼层的层剪力、基底剪重比、倾覆力矩随之增大。通过对试验数据拟合,分别得到结构的剪力系数和动力放大系数计算公式。弹塑性阶段前期结构动力放大系数下降较快,而在弹塑性阶段的后期其下降速度趋于平缓。通过对试验模型结构整体和各层间滞回曲线、骨架曲线和特征参数的分析,建立再生混凝土框架结构整体和层间刚度退化四折线型恢复力模型。最后基于破损程度的分析,提出再生混凝土框架结构在不同破坏状态下的性能指标,并进一步采用变形和能量组合的双重破坏准则对再生混凝土框架结构进行了抗震能力评价。
Based on 3D 6-DOF shaking table tests,the seismic response of the recycled aggregate concrete(RAC) frame was recorded.The analysis results indicate that the maximum inter-storey shear force and the maximum overturning moment reduce proportionally along the height of the model under the same seismic wave,and the inter-storey shear force,the shear-weight ratio and the overturning moment of the model increase progressively with the increase of acceleration amplitude.The relationship between peak ground acceleration(PGA) and shear coefficient or the dynamic amplification factor may be obtained by the mathematical fitting of experimental results.The dynamic amplification factor decreases rapidly at the early elasto-plastic stage,but decreases slowly with the development of elasto-plasticity.A four-line restoring force model with degenerated stiffness is proposed based on the analyses of hysteretic curves,skeleton curve and characteristic parameters of the model structure.The earthquake damage level for RAC frame is preliminarily classified and the corresponding performance design index is proposed according to the experimental results.Furthermore,a two-parameter seismic damage model based on deformation and cumulative energy dissipation is suggested to evaluate the seismic performance of the RAC frame structure.
Based on 3D 6-DOF shaking table tests,the seismic response of the recycled aggregate concrete(RAC) frame was recorded.The analysis results indicate that the maximum inter-storey shear force and the maximum overturning moment reduce proportionally along the height of the model under the same seismic wave,and the inter-storey shear force,the shear-weight ratio and the overturning moment of the model increase progressively with the increase of acceleration amplitude.The relationship between peak ground acceleration(PGA) and shear coefficient or the dynamic amplification factor may be obtained by the mathematical fitting of experimental results.The dynamic amplification factor decreases rapidly at the early elasto-plastic stage,but decreases slowly with the development of elasto-plasticity.A four-line restoring force model with degenerated stiffness is proposed based on the analyses of hysteretic curves,skeleton curve and characteristic parameters of the model structure.The earthquake damage level for RAC frame is preliminarily classified and the corresponding performance design index is proposed according to the experimental results.Furthermore,a two-parameter seismic damage model based on deformation and cumulative energy dissipation is suggested to evaluate the seismic performance of the RAC frame structure.
引文
[1]Xiao J,Li W,Poon C.Recent studies on mechanicalproperties of recycled aggregate concrete in China—a review[J].Science China Technological Sciences,2012,55(6):1463-1480
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[14]Xiao J,Li J,Chen J.Experimental study on the seismicresponse of braced reinforced concrete frame with irregularcolumns[J].Earthquake Engineering and EngineeringVibration,2011,10(4):487-494
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[16]Lu X,Zhou Y,Yan F.Shaking table test and numericalanalysis of RC frames with viscous wall dampers[J].Journal of Structural Engineering,2008,134(1):64-76
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[18]朱伯龙.结构抗震试验[M].北京:地震出版社,1989
[19]吕西林,卢文生.R.C.框架结构的振动台试验和面向设计的时程分析方法[J].地震工程与工程振动,1998,18(2):48-58(Lu Xilin,Lu Wensheng.Shaking table tests ofR.C.frames and development of design-oriented timehistory analysis method[J].Earthquake Engineering andEngineering Vibration,1998,18(2):48-58(in Chinese))
[20]肖建庄,谢猛.高性能混凝土框架火灾后抗震性能试验研究[J].土木工程学报,2005,38(8):36-42(XiaoJianzhuang,Xie Meng.An experimental study on theseismic behavior of HPC frames after fire[J].China CivilEngineering Journal,2005,38(8):36-42(in Chinese))
[21]李刚,程耿东.基于性能的结构抗震设计——理论、方法与应用[M].北京:科学出版社,2004
[22]Wen Y K,Kang Y J.Minimum building lifecycle costdesign criteria.I:methodology[J].Journal of StructuralEngineering,2001,127(3):330-337
[23]Wen Y K,Kang Y J.Minimum building life-cycle costdesign criteria.II:applications[J].Journal of StructuralEngineering,2001,127(3):338-346
[24]Park Y,Ang A H.Mechanistic seismic damage model forreinforced concrete[J].Journal of Structural Engineering,1985,111(4):722-739
[25]Park Y,Ang A H,Wen Y K.Seismic damage analysis ofreinforced concrete buildings[J].Journal of StructuralEngineering,1985,111(4):740-757
[26]Park Y J,Ang A H,Wen Y K.Damage-limiting aseismicdesign of buildings[J].Earthquake Spectra,1987,3(1):1-26
[2]Hansen T C.Recycling of demolished concrete and masonry[R].London:E&FN SPON,1992
[3]肖建庄,兰阳.再生混凝土梁抗剪性能试验研究[J].结构工程师,2004,20(6):54-58,53(Xiao Jianzhuang,Lan Yang.Experimental study on shear behavior ofrecycled concrete beams[J].Structural Engineers,2004,20(6):54-58,53(in Chinese))
[4]肖建庄,李宏,金少惷,等.压型钢板-再生混凝土组合板纵向抗剪承载力试验[J].结构工程师,2010,26(4):91-95(Xiao Jianzhuang,Li Hong,Jin Shaochun,etal.Longitudinal shear test on steel deck recycled aggregateconcrete composite slabs[J].Structural Engineers,2010,26(4):91-95(in Chinese))
[5]肖建庄,沈宏波,黄运标.再生混凝土柱受压性能试验[J].结构工程师,2006,22(6):73-77(XiaoJianzhuang,Shen Hongbo,Huang Yunbiao.Test oncompression performance of recycled concrete columns[J].Structural Engineers,2006,22(6):73-77(inChinese))
[6]曹万林,徐泰光,刘强,等.再生混凝土高剪力墙抗震性能试验研究[J].世界地震工程,2009,25(2):18-23(Cao Wanlin,Xu Taiguang,Liu Qiang,et al.Experimental study on seismic performance of high-riserecycled aggregate concrete shear wall[J].WorldEarthquake Engineering,2009,25(2):18-23(inChinese))
[7]肖建庄,朱晓晖.再生混凝土框架节点抗震性能研究[J].同济大学学报:自然科学版,2005,33(4):436-440(Xiao Jianzhuang,Zhu Xiaohui.Study on seismic behaviorof recycled concrete frame joints[J].Journal of TongjiUniversity:Natural Science Edition,2005,33(4):436-440(in Chinese))
[8]Xiao J,Sun Y,Falkner H.Seismic performance of framestructures with recycled aggregate concrete[J].Engineering Structures,2006,28(1):1-8
[9]王长青,肖建庄.再生混凝土框架结构模型振动台试验[J].同济大学学报:自然科学版,2012,40(12):1766-1772(Wang Changqing,Xiao Jianzhuang.Experimentalstudy on recycled aggregate concrete frame structure model[J].Journal of Tongji University:Natural ScienceEdition,2012,40(12):1766-1772(in Chinese))
[10]GB50010—2010混凝土结构设计规范[S].北京:中国建筑工业出版社,2010(GB50010—2010Code for designof concrete structures[S].Beijing:China Architecture&Building Press,2010(in Chinese))
[11]GB50011—2010建筑抗震设计规范[S].北京:中国建筑工业出版社,2010(GB50011—2010Code for seismicdesign of buildings[S].Beijing:China Architecture&Building Press,2010(in Chinese))
[12]Lu X,Chen L,Zhou Y,et al.Shaking table model testson a complex high-rise building with two towers of differentheight connected by trusses[J].The Structural Design ofTall and Special Buildings,2009,18(7):765-788
[13]Hosoya H.Shaking table tests of three-dimensional scalemodels of reinforced concrete high-rise frame structureswith wall columns[J].ACI Structural Journal,1995,92(6):765-780
[14]Xiao J,Li J,Chen J.Experimental study on the seismicresponse of braced reinforced concrete frame with irregularcolumns[J].Earthquake Engineering and EngineeringVibration,2011,10(4):487-494
[15]Bracci J M,Reinhorn A M,Mander J B.Seismic resistanceof reinforced concrete frame structures designed for gravityloads:performance of structural system[J].ACI StructuralJournal,1995,92(5):597-610
[16]Lu X,Zhou Y,Yan F.Shaking table test and numericalanalysis of RC frames with viscous wall dampers[J].Journal of Structural Engineering,2008,134(1):64-76
[17]JGJ3—2010高层建筑混凝土结构技术规程[S].北京:中国建筑工业出版社,2010(JGJ3—2010Technicalspecification for concrete structures of tall buildings[S].Beinjing:China Architecture&Building Press,2010(inChinese))
[18]朱伯龙.结构抗震试验[M].北京:地震出版社,1989
[19]吕西林,卢文生.R.C.框架结构的振动台试验和面向设计的时程分析方法[J].地震工程与工程振动,1998,18(2):48-58(Lu Xilin,Lu Wensheng.Shaking table tests ofR.C.frames and development of design-oriented timehistory analysis method[J].Earthquake Engineering andEngineering Vibration,1998,18(2):48-58(in Chinese))
[20]肖建庄,谢猛.高性能混凝土框架火灾后抗震性能试验研究[J].土木工程学报,2005,38(8):36-42(XiaoJianzhuang,Xie Meng.An experimental study on theseismic behavior of HPC frames after fire[J].China CivilEngineering Journal,2005,38(8):36-42(in Chinese))
[21]李刚,程耿东.基于性能的结构抗震设计——理论、方法与应用[M].北京:科学出版社,2004
[22]Wen Y K,Kang Y J.Minimum building lifecycle costdesign criteria.I:methodology[J].Journal of StructuralEngineering,2001,127(3):330-337
[23]Wen Y K,Kang Y J.Minimum building life-cycle costdesign criteria.II:applications[J].Journal of StructuralEngineering,2001,127(3):338-346
[24]Park Y,Ang A H.Mechanistic seismic damage model forreinforced concrete[J].Journal of Structural Engineering,1985,111(4):722-739
[25]Park Y,Ang A H,Wen Y K.Seismic damage analysis ofreinforced concrete buildings[J].Journal of StructuralEngineering,1985,111(4):740-757
[26]Park Y J,Ang A H,Wen Y K.Damage-limiting aseismicdesign of buildings[J].Earthquake Spectra,1987,3(1):1-26
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