再生混凝土柱地震破坏Park-Ang模型试验研究
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摘要
通过对不同配比的6根再生混凝土(RAC)柱进行低周反复试验,结合适用于普通混凝土柱的修正Park-Ang双参数损伤模型及实际结构各震害破损度Dc,确定了各RAC柱的循环荷载系数β的计算值。通过分析可得:再生骨料取代率及混杂纤维掺量对系数β均有明显的影响,需将二者同时作为计算系数β的重要因素。考虑配筋率对于系数β的影响,利用Matlab对以再生骨料取代率R、混杂纤维掺量Hf、配筋率ρa为基础的多变量线性方程进行拟合,确定了循环荷载系数β的计算公式:a fβ=0.0689ρ+0.02138 R+0.05614H,从而对修正Park-Ang模型作出了进一步修正,使其更适用于RAC柱的损伤计算。
Low-cyclic loading tests with recycled aggregate concrete(RAC) columns for six different proportions are carried out.Combining the modified Park-Ang two-parameter damage model suitable for ordinary concrete columns and the damaged degrees Dc for actual earthquake damage structures,cyclic loading coefficient β is calculated for RAC columns.By the analysis of calculated β,it concludes that β is significantly influenced by recycled aggregate replacement ratio and mixed fiber contents.And both of them should be taken into account as significant factors for calculation of β.Considering the effects of reinforcement ratio on β,multivariate linear equation for recycled aggregate replacement ratio R,mixed fiber contents Hf and reinforcement rate a ρ is fitted by using Matlab,for cyclic loading coefficient β,a formula is identified: a f β = 0.0689 ρ+ 0.02138 R +0.05614H.The modified Park-Ang model is further amended,and thus more applicable for damage calculation of RAC columns.
Low-cyclic loading tests with recycled aggregate concrete(RAC) columns for six different proportions are carried out.Combining the modified Park-Ang two-parameter damage model suitable for ordinary concrete columns and the damaged degrees Dc for actual earthquake damage structures,cyclic loading coefficient β is calculated for RAC columns.By the analysis of calculated β,it concludes that β is significantly influenced by recycled aggregate replacement ratio and mixed fiber contents.And both of them should be taken into account as significant factors for calculation of β.Considering the effects of reinforcement ratio on β,multivariate linear equation for recycled aggregate replacement ratio R,mixed fiber contents Hf and reinforcement rate a ρ is fitted by using Matlab,for cyclic loading coefficient β,a formula is identified: a f β = 0.0689 ρ+ 0.02138 R +0.05614H.The modified Park-Ang model is further amended,and thus more applicable for damage calculation of RAC columns.
引文
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[2]肖建庄,兰阳.再生粗骨料混凝土梁抗弯性能试验研究[J].特种结构,2006,23(1):9-12.(Xiao Jianzhuang,Lan Yang.Study on flexural behavior of recycled aggregate concrete beam[J].Special Structures,2006,23(1):9-12.(in Chinese))
[3]史宇.钢纤维再生混凝土抗冲击性能的试验研究[J].科技资讯,2012(7):39-42.(Shi Yu.Impact resistance test on steel fiber recycled concret[J].Science&Technology Information,2012(7):39-42.(in Chinese))
[4]吴建华,马石城,唐昭青,等.聚丙烯纤维和硅粉对再生混凝土的强化试验研究[J].混凝土,2006(11):36-38.(Wu Jianhua,Ma Shicheng,Tang Zhaoqing,et al.Intensified test research on the influence of polypropylene fiber&silica fume on recycled concrete[J].Concrete,2006(11):36-38.(in Chinese))
[5]李军旗,赵世春.钢筋混凝土构件损伤模型[J].兰州铁道学院学报,2000,19(3):25-27.(Li Junqi,Zhao Shichun.Damage model of reinforced concrete member[J].Journal of Lanzhou Railway Institute,2000,19(3):25-27.(in Chinese))
[6]林煌斌,王全凤,刘良林.高强混凝土柱变形-耗能损伤模型的参数确定[J].华侨大学学报,2011,32(3):322-325.(Lin Huangbin,Wang Quanfeng,Liu Lianglin.Analysis of deformation-hysteretic energy dissipation damage model of high-strength reinforced concrete columns[J].Journal of Huaqiao University,2011,32(3):322-325.(in Chines))
[7]曹万林,张亚齐.再生混凝土结构抗震性能研究进展[C]//首届全国再生混凝土研究和应用学术交流会.上海:中国土木工程学会,2008.(Cao Wanlin,Zhang Yaqi.Research advances on seismic behavior of recycled concrete structure[C]//First National of Recycled Concrete Research and Application of Academic Exchange.Shanghai:China Ciril Engineering Society,2008.(in Chinese))
[8]Kunnath S K,Reinhorn A M,Park Y J.Analytical modeling of inelastic seismic response of RC structures[J].Journal of Structural Engineering,1990,116(4):996-1017.
[9]Park Y J,Ang H S.Mechanistic seismic damage model for reinforced concrete[J].Journal of Structure Engineering,1985,111(4):722-739.
[10]中国地震局工程力学研究所.GB/T17742-2008中国地震烈度表[S].北京:中国建筑工业出版社,2008.(Institute of Engineering Mechanics,China Earthquake Administration.GB/T17742-2008Chinese seismic intensity scale[S].Beijing:China Building Industry Press,2008.(in Chinese))
[11]胡聿贤.地震工程学[M].北京:地震出版社,2006.(Hu Yuxian.Earthquake engineering[M].Beijing:Seismological Press,2006.(in Chinese))
[12]王社良,张博,赵祥,等.一种多元混杂再生纤维增强再生混凝土制备方法:中国,CN102584135A[P].2012-07-18.(Wang Sheliang,Zhang Bo,Zhao Xiang,et al.A multivariate mixed renewable fiber reinforced recycled concrete preparation:China,CN102584135A[P].2012-07-18.(in Chinese))
[13]张波志,王社良,张博,等.再生混凝土基本力学性能试验研究[J].混凝土,2011(7):4-6.(Zhang Bozhi,Wang Sheliang,Zhang Bo,et al.Experimental analysis of the basic mechanical properties of recycled concrete[J].Concrete,2011(7):4-6.(in Chinese))
[14]中华人民共和国建设部.GB/T 50081-2002普通混凝土力学性能试验方法标准[S].北京:中国建筑工业出版社,2003.(PRC Ministry of Constuction.GB/T 50081-2002 Ordinary concrete mechanics performance test method standard[S].Beijing:China Building Industry Press,2003.(in Chinese))
[15]胡琼,卢锦.再生混凝土柱抗震性能试验[J].哈尔滨工业大学学报,2012(2):23-27.(Hu Qiong,Lu Jin.Experimental research on hysteretic behavior of recycled concrete[J].Journal of Harbin Institute of Technology,2012(2):23-27.(in Chinese))
[16]牛荻涛,任利杰.改进的钢筋混凝土结构双参数地震破坏模型[J].地震工程与工程振动,1996(4):44-54.(Niu Ditao,Ren Lijie.A modified seismic damage model with double variables for reinforced concrete structures[J].Earthquake Engineering and Engineering Vibration,1996(4):44-54.(in Chinese))
[17]刘阳,郭子雄,黄群贤.型钢混凝土柱的损伤模型试验研究[J].武汉理工大学学报,2010(9):203-207.(Liu Yang,Guo Zixiong,Huang Qunxian.Experimental study of damage model for SRC columns[J].Journal of Wuhan University of Technology,2010(9):203-207.(in Chinese))
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