方钢管高强混凝土柱恢复力模型研究
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摘要
根据23根方钢管高强混凝土柱在反复水平荷载作用下的试验结果,通过理论分析和试验结果的回归分析,提出了方钢管高强混凝土柱的恢复力模型;确定了轴压比、约束效应系数、长细比等主要参数与恢复力模型之间的关系;给出了各特征点参数的计算方法。研究结果表明:最大荷载与屈服荷载的比值、退化刚度与弹性刚度的比值都随着轴压比和长细比的增加而减小,随着约束效应系数的增加而增大;按建议的恢复力模型计算的骨架曲线与试验曲线符合较好。文中建议的恢复力模型既反映了主要影响因素,又便于对结构进行非线性动力分析。
Based on experimental results of 23 high strength concrete-filled rectangular steel tubular(HCRST) columns subjected to cyclic lateral load,the restoring force model of HCRST columns is researched.Through theoretical and regression analysis and experimental results,the relations between the restoring model of HCRST columns and axial load ratio,confinement effect coefficient as well as slenderness ratio are discussed.The calculating methods and steps are established.The results show that the ratios of degraded stiffness to elastic stiffness and maximum loads to yielding loads are proportional with confinable effect coefficient,and are inversely proportional with axial load ratio and slenderness ratio.Many various influential factors are considered in the restoring force model of HCRST columns.The model is close to the experimental results,which can be conveniently applied to nonlinear dynamic analysis of tall building composite structures.
Based on experimental results of 23 high strength concrete-filled rectangular steel tubular(HCRST) columns subjected to cyclic lateral load,the restoring force model of HCRST columns is researched.Through theoretical and regression analysis and experimental results,the relations between the restoring model of HCRST columns and axial load ratio,confinement effect coefficient as well as slenderness ratio are discussed.The calculating methods and steps are established.The results show that the ratios of degraded stiffness to elastic stiffness and maximum loads to yielding loads are proportional with confinable effect coefficient,and are inversely proportional with axial load ratio and slenderness ratio.Many various influential factors are considered in the restoring force model of HCRST columns.The model is close to the experimental results,which can be conveniently applied to nonlinear dynamic analysis of tall building composite structures.
引文
[1]韩林海.钢管混凝土结构理论与实践[M](第二版).北京:科学出版社,2007.HAN Linhai.Theory and practice of concrete-filled steel tubular structure[M].Beijing:Science Press,2007.
[2]屠永清.钢管混凝土压弯构件恢复力特征的研究[D].哈尔滨:哈尔滨建筑大学,1994.TU Yongqing.Research on the characteristics of restoring force for concrete-filled steel tube compression-bending members[D].Harbin:HarbinBuilding University,1994.
[3]韩林海,陶忠.方钢管混凝土柱的延性系数[J].地震工程与工程振动,2000,20(4):56-65.HAN Linhai,TAO Zhong.Ductility coefficient of concrete filled steel tubular columns with square sections[J].Journal of Earthquake Engineeringand Engineering Vibration,2000,20(4):56-65.
[4]张素梅,刘界鹏,王玉银,et al.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 biaxial loaded high strength concrete-filled square hollow section beam-column[J].Journal of building structures,2005,26(3):9-18.
[5]孙修礼,梁书亭,段友利.钢管混凝土框架骨架曲线研究[J].地震工程与工程振动,2007,27(1):99-103.SUN Xiuli,LIANG Shuting,DUAN Youli.Research on skeleton curves of concrete-filled steel tubular frame structure[J].Journal of Earthquake En-gineering and Engineering Vibration,27(1):99-103.
[6]Varma A H,Richard J M.Seismic behavior and design of high-strength square concrete-filled steel tube beam columns[J].Journal of StructuralEngineering,2004,13(2):169-179.
[7]游经团.矩形钢管混凝土压弯构件滞回性能研究[D].福州:福州大学,2002.YOU Jingtuan.Study for dynamical behaviors of concrete filled rectangular steel tubes[D].Fuzhou:Fuzhou University,2002.
[8]李学平,吕西林,郭少春.反复荷载作用下矩形钢管混凝土柱的抗震性能的试验研究[J].地震工程与工程振动,2005,25(5):95-103.LI xueping,L U¨Xilin,GUO Shaochun.Seismic behavior of CFRT columns under cyclic loading[J].Journal of Earthquake Engineering and Engi-neering Vibration,2007,25(5):95-103.
[9]马恺泽.方钢管高强混凝土柱抗震性能研究[D].内蒙古科技大学,2008.MA Kaize.Study on seismic behaviors of high strength concrete-filled rectangular steel tube columns[D].Inner Mongolia Scientific and TechnicalUniversity,2008.
[10]Eurocode4(EC4),Design of composite steel and concrete structure-partⅠ:General rules and for buildings[S].
[2]屠永清.钢管混凝土压弯构件恢复力特征的研究[D].哈尔滨:哈尔滨建筑大学,1994.TU Yongqing.Research on the characteristics of restoring force for concrete-filled steel tube compression-bending members[D].Harbin:HarbinBuilding University,1994.
[3]韩林海,陶忠.方钢管混凝土柱的延性系数[J].地震工程与工程振动,2000,20(4):56-65.HAN Linhai,TAO Zhong.Ductility coefficient of concrete filled steel tubular columns with square sections[J].Journal of Earthquake Engineeringand Engineering Vibration,2000,20(4):56-65.
[4]张素梅,刘界鹏,王玉银,et al.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 biaxial loaded high strength concrete-filled square hollow section beam-column[J].Journal of building structures,2005,26(3):9-18.
[5]孙修礼,梁书亭,段友利.钢管混凝土框架骨架曲线研究[J].地震工程与工程振动,2007,27(1):99-103.SUN Xiuli,LIANG Shuting,DUAN Youli.Research on skeleton curves of concrete-filled steel tubular frame structure[J].Journal of Earthquake En-gineering and Engineering Vibration,27(1):99-103.
[6]Varma A H,Richard J M.Seismic behavior and design of high-strength square concrete-filled steel tube beam columns[J].Journal of StructuralEngineering,2004,13(2):169-179.
[7]游经团.矩形钢管混凝土压弯构件滞回性能研究[D].福州:福州大学,2002.YOU Jingtuan.Study for dynamical behaviors of concrete filled rectangular steel tubes[D].Fuzhou:Fuzhou University,2002.
[8]李学平,吕西林,郭少春.反复荷载作用下矩形钢管混凝土柱的抗震性能的试验研究[J].地震工程与工程振动,2005,25(5):95-103.LI xueping,L U¨Xilin,GUO Shaochun.Seismic behavior of CFRT columns under cyclic loading[J].Journal of Earthquake Engineering and Engi-neering Vibration,2007,25(5):95-103.
[9]马恺泽.方钢管高强混凝土柱抗震性能研究[D].内蒙古科技大学,2008.MA Kaize.Study on seismic behaviors of high strength concrete-filled rectangular steel tube columns[D].Inner Mongolia Scientific and TechnicalUniversity,2008.
[10]Eurocode4(EC4),Design of composite steel and concrete structure-partⅠ:General rules and for buildings[S].
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