考虑双轴水平力耦合效应的RPC箱型桥墩恢复力模型试验研究
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摘要
通过3个施加常轴力的RPC箱型桥墩试件的水平反复荷载试验,考虑水平荷载作用方向对RPC箱型墩抗震性能的影响,分析各试件滞回特性和骨架曲线的特点,对影响RPC箱型桥墩恢复力模型的主要因素进行数值回归分析,建立了计入双轴水平力耦合效应的RPC箱型桥墩恢复力模型。利用基于平截面假定的纤维模型法编制考虑轴力二阶效应的双轴压弯构件非线性分析程序,并对RPC箱型桥墩试件的骨架曲线和滞回曲线进行数值模拟。通过与试验结果进行分析对比表明:所提出的恢复力模型具有较好的精确性,能够较好地模拟和反映RPC箱型桥墩的抗震性能。
Based on cyclic loading tests of three reactive power concrete box pier samples under invariable axial force and reversed horizontal load,hysteretic properties and characteristics of the skeleton curves of the samples were analyzed.At the same time,the factors affecting the restoring force models of the samples were considered and the numerical regressive analysis method was used to establish the restoring force model of reactive power concrete box piers under biaxial horizontal loads.In addition,the numerical simulation analysis was performed with the program compiled with the fiber model method taking into account the second-order effects of the axial force and biaxial loads.The results are in good agreement with the experimental results,which shows that the restoring force model presented in this paper can accurately simulate and reflect the seismic behavior of reactive power concrete box piers.
Based on cyclic loading tests of three reactive power concrete box pier samples under invariable axial force and reversed horizontal load,hysteretic properties and characteristics of the skeleton curves of the samples were analyzed.At the same time,the factors affecting the restoring force models of the samples were considered and the numerical regressive analysis method was used to establish the restoring force model of reactive power concrete box piers under biaxial horizontal loads.In addition,the numerical simulation analysis was performed with the program compiled with the fiber model method taking into account the second-order effects of the axial force and biaxial loads.The results are in good agreement with the experimental results,which shows that the restoring force model presented in this paper can accurately simulate and reflect the seismic behavior of reactive power concrete box piers.
引文
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[2]Bonneau O,Lachemi M.Mechanical properties and durability of two industrial reactive powder concrete[J].ACI Material Journal,1997,94(4):286-290.
[3]张素梅,刘界鹏,王玉银,等.双向压弯方钢管高强混凝土构件滞回性能试验与分析[J].建筑结构学报,2005,26(3):9-18.ZHANG Sumei,LIU Jiepeng,WANG Yuyin,et al.Hysteretic behavior of biaxially loaded high strength concrete-filled square hollow section beam-columns[J].Journal of Building Structures,2005,26(3):9-18.(in Chinese)
[4]郭子雄,张志伟,黄群贤,等.型钢混凝土柱恢复力模型试验研究[J].地震工程与工程振动,2009,29(5):79-85.GUO Zixiong,ZHANG Zhiwei,HUANG Qunxian,et al.Experimental study on hysteretic model of SRC columns[J].Journal of Earthquake Engi-neering and Engineering Vibration,2009,29(5):79-85.(in Chinese)
[5]齐岳,郑文忠.核心高强混凝土柱荷载-位移恢复力模型[J].哈尔滨工业大学学报,2010,42(4):531-535.QI Yue,ZHENG Wenzhong.Restoring-force model of load versus displacement for concrete columns with high strength core[J].Journal of HarbinInstitute of Technology,2010,42(4):531-535.(in Chinese)
[6]郝文秀,钟铁毅,赵冠远.活性粉末混凝土空心桥墩恢复力模型试验研究[J].铁道学报,2011,33(8):89-93.HAO Wenxiu,ZHONG Tieyi,ZHAO Guanyuan.Experimental study on the restoring force model of reactive powder concrete hollow piers[J].Jour-nal of The China Railway Society,2011,33(8):89-93.(in Chinese)
[7]何政,欧进萍.钢筋混凝土结构非线性分析[M].哈尔滨:哈尔滨工业大学出版社,2007.HE Zheng,OU Jinping.Nonlinear analysis of reinforced concrete structure[M].Harbin:Harbin Institute of Technology Press,2007.(in Chinese)
[8]单波.活性粉末混凝土基本力学性能的试验与研究[D].长沙:湖南大学土木工程学院,2002:35-50.SHAN Bo.Experiment and study on mechanical performance of RPC[D].Changsha:College of Civil Engineering of Hunan University,2002,35-50.(in Chinese)
[9]王诚.活性粉末混凝土箱型桥墩抗震性能试验研究[D].长沙:湖南大学土木工程学院,2010:48-50.WANG Cheng.Experimental and study on seismic performance of RPC box piers[D].Changsha:College of Civil Engineering of Hunan University,2010,48-50.(in Chinese)
[10]原海燕.配筋活性粉末混凝土受拉性能试验研究及理论分析[D].北京:北京交通大学,2009:56-64.YUAN Haiyan.Theoretical analysis and experimental research on tensile performance of reinforced reactive powder concrete[D].Beijing:BeijingJiaotong University,2009:56-64.(in Chinese)
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