高强钢筋高强混凝土柱损伤模型试验研究
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摘要
该文主要研究了轴压比系数和体积配箍率等因素对配有高强钢筋高强混凝土柱滞回特性的影响和配有高强钢筋高强混凝土柱在不同抗震性态水平条件下的变形指标。通过试验结果分析了配有高强钢筋高强混凝土柱试件的破坏形态、变形能力、滞回特性等抗震性能指标。基于配有高强钢筋高强混凝土柱试件的低周反复加载试验结果,该文采用修正Park-Ang模型对12个配有高强钢筋高强混凝土柱试件进行了不同位移角幅值下的损伤指数计算对比分析。基于不同性能水平下的变形和相关参数试验结果,提出了以裂缝宽度和纵向钢筋应力水平、残余变形、极限转角分别作为正常使用、可修和避免倒塌等性能水平的评定参数,并建议了相应性能水平的限值。与试验结果的对比显示,该模型可以合理的反映不同参数高强混凝土柱的损伤发展过程,可为高强混凝土结构基于性态的震损评估提供参考。
A new damage model for the high-strength concrete column reinforced with high-strength stirrup is presented.The effects of axial compression ratio and stirrup ratio on hysteretic characteristics of the high strength concrete columns reinforced with high strength reinforcement(HSC) and the seismic performance parameters for the performance based seismic design of HSC columns were investigated.The failure mechanism,ductility,and hysteretic behavior were analyzed based on the experimental data.The damage index of 12 HSC columns under different story drifts was calculated using the modified Park-Ang model.According to the damage characteristics and measurement results,a series of performance parameters and the corresponding limit value that can be used to evaluate the performance level of HSC columns under earthquake was proposed.It is indicated that the crack width and stress level of a longitudinal bar,the residual drift and ultimate drift index can be adopted as the key parameters to appraise the seismic performance of functional,repairable and collapse avoidable capacities,respectively.The comparison between the calculated damage indices using the proposed model and test results shows a good agreement.This can be referenced for the performance based seismic assessment of HSC columns.
A new damage model for the high-strength concrete column reinforced with high-strength stirrup is presented.The effects of axial compression ratio and stirrup ratio on hysteretic characteristics of the high strength concrete columns reinforced with high strength reinforcement(HSC) and the seismic performance parameters for the performance based seismic design of HSC columns were investigated.The failure mechanism,ductility,and hysteretic behavior were analyzed based on the experimental data.The damage index of 12 HSC columns under different story drifts was calculated using the modified Park-Ang model.According to the damage characteristics and measurement results,a series of performance parameters and the corresponding limit value that can be used to evaluate the performance level of HSC columns under earthquake was proposed.It is indicated that the crack width and stress level of a longitudinal bar,the residual drift and ultimate drift index can be adopted as the key parameters to appraise the seismic performance of functional,repairable and collapse avoidable capacities,respectively.The comparison between the calculated damage indices using the proposed model and test results shows a good agreement.This can be referenced for the performance based seismic assessment of HSC columns.
引文
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[3]阎石,肖潇,张曰果,等.高强钢筋约束混凝土矩形截面柱的抗震性能试验研究[J].沈阳建筑大学学报(自然科学版),2006,22(1):7―10.Yan Shi,Xiao Xiao,Zhang Yueguo,et al.Seismicperformances of square HSC columns confined withhigh-strength PC rebar[J].Journal of Shenyang JianzhuUniversity(Natural Science),2006,22(1):8―10.(inChinese)
[4]阎石,张曰果,王旭东.圆形截面高强混凝土柱抗震性能试验研究[J].沈阳建筑大学学报(自然科学版),2006,22(4):538―542.Yan Shi,Zhang Yueguo,Wang Xudong.Seismicperformance test study on circular HSC columnsconfined with high-strength rebar[J].Journal ofShenyang Jianzhu University(Natural Science),2006,22(4):538―542.(in Chinese)
[5]肖潇.配有高强钢筋的高强混凝土柱的抗震性能研究[D].沈阳:沈阳建筑大学,2004.Xiao Xiao.Seismic behaviors of high strength concretecolumns reinforced with high strength reinforcement[D].Shenyang:Shenyang Jianzhu University,2004.(inChinese)
[6]张曰果.高强钢筋高强混凝土圆柱抗震性能研究[D].沈阳:沈阳建筑大学,2005.Zhang Yueguo.Seismic behaviors of high strengthconcrete circular columns reinforced with high strengthreinforcement[D].Shenyang:Shenyang JianzhuUniversity,2005.(in Chinese)
[7]郭子雄,刘阳,杨勇.结构震害指数研究评述[J].地震工程与工程振动,2004,24(5):56―61.Guo Zixiong,Liu Yang,Yang Yong.State-of-the-art ofseismic damage index of structures[J].EarthquakeEngineering and Engineering Vibration,2004,24(5):56―61.(in Chinese)
[8]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,2010,32(9):203―207.Liu Yang,Guo Zixiong,Huang Qunxian.Experimentalstudy of damage model for src columns[J].Journal ofWuhan University of Technology,2010,32(9):203―207.(in Chinese)
[9]郭子雄,刘阳,杨勇.框架柱试验结果的震害指数计算模型比较[J].华侨大学学报(自然科学版),2005,26(2):145―148.Guo Zixiong,Liu Yang,Yang Yong.A comparativestudy on seismic damage index based on test results[J].Journal of Huaqiao University(Natural Science),2005,26(2):145―148.(in Chinese)
[10]郭子雄,林煌,刘阳.不同配箍形式型钢混凝土柱抗震性能试验研究[J].建筑结构学报,2010,31(4):110―115.Guo Zixiong,Lin Huang,Liu Yang.Experimental studyon seismic behavior of SRC columns with differentstirrup configuration[J].Journal of Building Structures,2010,31(4):110―115.(in Chinese)
[2]Kunnath S K,Reinhorn A M,Park YJ.AnalyticalModeling of Inelastic Seismic Response of RC Structures[J].Journal of Structural Engineering,1990,116(4):996―1017.
[3]阎石,肖潇,张曰果,等.高强钢筋约束混凝土矩形截面柱的抗震性能试验研究[J].沈阳建筑大学学报(自然科学版),2006,22(1):7―10.Yan Shi,Xiao Xiao,Zhang Yueguo,et al.Seismicperformances of square HSC columns confined withhigh-strength PC rebar[J].Journal of Shenyang JianzhuUniversity(Natural Science),2006,22(1):8―10.(inChinese)
[4]阎石,张曰果,王旭东.圆形截面高强混凝土柱抗震性能试验研究[J].沈阳建筑大学学报(自然科学版),2006,22(4):538―542.Yan Shi,Zhang Yueguo,Wang Xudong.Seismicperformance test study on circular HSC columnsconfined with high-strength rebar[J].Journal ofShenyang Jianzhu University(Natural Science),2006,22(4):538―542.(in Chinese)
[5]肖潇.配有高强钢筋的高强混凝土柱的抗震性能研究[D].沈阳:沈阳建筑大学,2004.Xiao Xiao.Seismic behaviors of high strength concretecolumns reinforced with high strength reinforcement[D].Shenyang:Shenyang Jianzhu University,2004.(inChinese)
[6]张曰果.高强钢筋高强混凝土圆柱抗震性能研究[D].沈阳:沈阳建筑大学,2005.Zhang Yueguo.Seismic behaviors of high strengthconcrete circular columns reinforced with high strengthreinforcement[D].Shenyang:Shenyang JianzhuUniversity,2005.(in Chinese)
[7]郭子雄,刘阳,杨勇.结构震害指数研究评述[J].地震工程与工程振动,2004,24(5):56―61.Guo Zixiong,Liu Yang,Yang Yong.State-of-the-art ofseismic damage index of structures[J].EarthquakeEngineering and Engineering Vibration,2004,24(5):56―61.(in Chinese)
[8]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,2010,32(9):203―207.Liu Yang,Guo Zixiong,Huang Qunxian.Experimentalstudy of damage model for src columns[J].Journal ofWuhan University of Technology,2010,32(9):203―207.(in Chinese)
[9]郭子雄,刘阳,杨勇.框架柱试验结果的震害指数计算模型比较[J].华侨大学学报(自然科学版),2005,26(2):145―148.Guo Zixiong,Liu Yang,Yang Yong.A comparativestudy on seismic damage index based on test results[J].Journal of Huaqiao University(Natural Science),2005,26(2):145―148.(in Chinese)
[10]郭子雄,林煌,刘阳.不同配箍形式型钢混凝土柱抗震性能试验研究[J].建筑结构学报,2010,31(4):110―115.Guo Zixiong,Lin Huang,Liu Yang.Experimental studyon seismic behavior of SRC columns with differentstirrup configuration[J].Journal of Building Structures,2010,31(4):110―115.(in Chinese)
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