基于纤维模型的外包钢加固混凝土框架结构静力弹塑性分析
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摘要
目的发展弹塑性数值模拟方法,为外包钢加固框架结构的抗震性能分析提供参考.方法基于纤维模型,提出对采用外包钢加固的混凝土柱进行静力非线性分析的方法,在此基础上研究在结构整体层次上的外包钢加固框架结构静力弹塑性分析方法,截面分析、构件分析及结构分析均在OpenSees平台上编程实现.结果构件层次上,经与两次不同试验的结果比较,验证了方法正确可行.运用自编程序,结合实际加固方案,探讨了在常用工程分析软件中如何进行外包钢加固框架这一特殊结构的静力弹塑性分析的实用方法.结论弹塑性分析方法能反映出局部加强后结构失效的演化过程,能方便地用于加固后结构抗震性能评估.
The aim of the study is to develop the numerical simulation approach of the elastoplastic seismic performance of RC frame strengthened with externally bonded steel frame.Base on fiber model,the approach for nonlinear static analysis of RC column strengthened with externally bonded steel frame is proposed on the level of component,and the simulation results are found in good agreement with two experimental results,which proves the feasibility of the method.The nonlinear static analysis method of RC frame strengthened with externally bonded steel is presented on the structural level.The procedures for analysis of section,component and structure are programmed on OpenSees.The practical nonlinear static analysis method about how to apply the popular analysis software to the strengthened structure is discussed on the evaluation of a strengthening project in comparison with the results from program in this paper.The results show that the approach proposed in this paper is able to demonstrate the evolution of the structural failure after local strengthening,and can be applied conveniently to the seismic evaluation of the strengthened structures.
The aim of the study is to develop the numerical simulation approach of the elastoplastic seismic performance of RC frame strengthened with externally bonded steel frame.Base on fiber model,the approach for nonlinear static analysis of RC column strengthened with externally bonded steel frame is proposed on the level of component,and the simulation results are found in good agreement with two experimental results,which proves the feasibility of the method.The nonlinear static analysis method of RC frame strengthened with externally bonded steel is presented on the structural level.The procedures for analysis of section,component and structure are programmed on OpenSees.The practical nonlinear static analysis method about how to apply the popular analysis software to the strengthened structure is discussed on the evaluation of a strengthening project in comparison with the results from program in this paper.The results show that the approach proposed in this paper is able to demonstrate the evolution of the structural failure after local strengthening,and can be applied conveniently to the seismic evaluation of the strengthened structures.
引文
[1]卢亦焱,陈少雄,赵国藩.外包钢与碳纤维布复合加固钢筋混凝土柱抗震性能试验研究[J].土木工程学报,2005(8):10-17.(Lu Yiyan,Chen Shaoxiong,Zhao Guofan.An ex-perimental study on the seismic behavior of rein-forced concrete column strengthened with bonded steel hoops and carbon fiber reinforced polymer sheet[J].China Civil Engineering Journal,2005(8):10-17.)
[2]Chai Y H,Priestley M J N,Seible F.Analytical mod-el for steel-jacketed RC circular bridge columns[J].Journal of Structural Engineering,1994,120(8):2358-2376.
[3]Yan Xiao,Wu Hui.Retrofit of reinforced concrete columns using partially stiffened steel jackets[J].Journal of Structural Engineering,2003,129(6):725-732.
[4]Applied Technology Council(ATC-55Project).Fema-440improvement of nonlinear static seismic a-nalysis procedures[R].Washington:FEMA,2005.
[5]梁兴文,叶艳霞.混凝土结构非线性分析[M].北京:中国建筑工业出版社,2007.(Liang Xingwen,Ye Yanxia.Nonlinear analysis of concrete structures[M].Beijing:China Architecture&Building Press,2007.)
[6]Silvia M,Frank M,Michael H S,et al.OpenSees command language manual[EB/OL].Berkeley:Pa-cific Earthquake Engineering Research Center,2006[2008-11-12].http://opensees.berkeley.edu/.
[7]Silvia Mazzoni,McKenna Frank,Michael H S,et al.OpenSees examples primer[EB/OL].Berkeley:Pa-cific Earthquake Engineering Research Center,2006[2008-11-12].http://opensees.berkeley.edu/.
[8]Michael H S,Kidarsa A.Development of bridge rat-ing applications using OpenSees and Tcl[J].Journal of Computing in Civil Engineering,2008,22(4):264-271.
[9]潘志宏,李爱群.基于纤维模型的外粘型钢加固混凝土柱静力弹塑性分析[J].东南大学学报:自然科学版,2009,39(3):552-556.(Pan Zhihong,Li Aiqun.Nonlinear static analysis on RC column strengthened with externally bonded steel frame based on fiber model[J].Journal of Southeast University:Natural Science,2009,39(3):552-556.)
[10]刘瑛,赵金先,荣强,等.湿式外包钢加固钢筋混凝土柱抗震性能试验研究[J].世界地震工程,2004(1):105-111.(Liu Ying,Zhao Jinxian,Rong Qiang,et al.The test and study on earthquake resistant capacity of strengthening reinforced concrete column with wet encased steel[J].World Earthquake Engineering,2004(01):105-111.)
[11]四川省建筑科学研究院.GB50367-2006混凝土结构加固设计规范[S].北京:中国建筑工业出版社,2006.(Sichuang Research Institute of Building Science.GB50367-2006Design code for strengthening con-crete structure[S].Beijing:China Architecture&Building Press,2006.)
[2]Chai Y H,Priestley M J N,Seible F.Analytical mod-el for steel-jacketed RC circular bridge columns[J].Journal of Structural Engineering,1994,120(8):2358-2376.
[3]Yan Xiao,Wu Hui.Retrofit of reinforced concrete columns using partially stiffened steel jackets[J].Journal of Structural Engineering,2003,129(6):725-732.
[4]Applied Technology Council(ATC-55Project).Fema-440improvement of nonlinear static seismic a-nalysis procedures[R].Washington:FEMA,2005.
[5]梁兴文,叶艳霞.混凝土结构非线性分析[M].北京:中国建筑工业出版社,2007.(Liang Xingwen,Ye Yanxia.Nonlinear analysis of concrete structures[M].Beijing:China Architecture&Building Press,2007.)
[6]Silvia M,Frank M,Michael H S,et al.OpenSees command language manual[EB/OL].Berkeley:Pa-cific Earthquake Engineering Research Center,2006[2008-11-12].http://opensees.berkeley.edu/.
[7]Silvia Mazzoni,McKenna Frank,Michael H S,et al.OpenSees examples primer[EB/OL].Berkeley:Pa-cific Earthquake Engineering Research Center,2006[2008-11-12].http://opensees.berkeley.edu/.
[8]Michael H S,Kidarsa A.Development of bridge rat-ing applications using OpenSees and Tcl[J].Journal of Computing in Civil Engineering,2008,22(4):264-271.
[9]潘志宏,李爱群.基于纤维模型的外粘型钢加固混凝土柱静力弹塑性分析[J].东南大学学报:自然科学版,2009,39(3):552-556.(Pan Zhihong,Li Aiqun.Nonlinear static analysis on RC column strengthened with externally bonded steel frame based on fiber model[J].Journal of Southeast University:Natural Science,2009,39(3):552-556.)
[10]刘瑛,赵金先,荣强,等.湿式外包钢加固钢筋混凝土柱抗震性能试验研究[J].世界地震工程,2004(1):105-111.(Liu Ying,Zhao Jinxian,Rong Qiang,et al.The test and study on earthquake resistant capacity of strengthening reinforced concrete column with wet encased steel[J].World Earthquake Engineering,2004(01):105-111.)
[11]四川省建筑科学研究院.GB50367-2006混凝土结构加固设计规范[S].北京:中国建筑工业出版社,2006.(Sichuang Research Institute of Building Science.GB50367-2006Design code for strengthening con-crete structure[S].Beijing:China Architecture&Building Press,2006.)
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