湿式外包钢法加固RC-L形柱的有限元仿真分析
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摘要
利用有限元分析软件ANSYS设置混凝土、钢筋和外包角钢的单元类型、控制参数及材料模型,进行精细网格划分,建立实足尺寸的湿式外包钢加固RC-L形柱的有限元模型。有限元仿真分析得到了RC-L形柱模型中混凝土、钢筋骨架及外包角钢的应力云图和相应的荷载位移曲线。在相同的边界条件及加载模式下,相比未加固柱模型,湿式外包钢加固模型破坏前用了较多荷载子步数且产生较小位移。对比分析结果,得出湿式外包钢加固法应用于钢筋混凝土异形柱构件的加固具有良好的性能。
The finite element model of full size RC-L column is established by using finite element analysis software ANSYS.The element types,control parameters and material models of concrete,steel bar and angle are set respectively and the grids are divided finely.Based on the analysis of FEM simulation,the stress and the corresponding load-displacement curves of concrete,steel skeleton and the external angle of RC-L-shaped column model are obtained.Under the same boundary conditions and loading,the model reinforced by wet-enclosing steel takes more load steps and produces a smaller sub-shift before the damage when compared with the model without reinforcement.Comparing with the analysis results,it can be seen that it has a good performance to reinforce RC column with special shape by wet-enclosing steel reinforcement method.
The finite element model of full size RC-L column is established by using finite element analysis software ANSYS.The element types,control parameters and material models of concrete,steel bar and angle are set respectively and the grids are divided finely.Based on the analysis of FEM simulation,the stress and the corresponding load-displacement curves of concrete,steel skeleton and the external angle of RC-L-shaped column model are obtained.Under the same boundary conditions and loading,the model reinforced by wet-enclosing steel takes more load steps and produces a smaller sub-shift before the damage when compared with the model without reinforcement.Comparing with the analysis results,it can be seen that it has a good performance to reinforce RC column with special shape by wet-enclosing steel reinforcement method.
引文
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[2]HADIMNS.Behavior of FRP strengthened concrete columnsunder eccentric compression loading[J].Composite Struc-tures,2007,77(1):92-96.
[3]刘瑛,赵金先,荣强.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,2004,20(1):105-111.
[4]GB50367-2006,混凝土结构加固设计规范[S].
[5]张俊杰,何陶.型刚轻骨料混凝土梁正截面受弯裂缝实验[J],黑龙江科技学院学报,2009,9(6):482-485.
[6]李华,黎立云.钢管混凝土组合节点的非线性有限元分析[J].河北工程大学学报(自然科学版),2010,27(1):25-28.
[7]芳枋,卫建祥,慈军,等.工程结构的空间非线性有限元分析[J].河北工程大学学报(自然科学版),2008,25(3):30-33.
[8]谢征勋,谢敏.工程事故与安全-结构加固技术[M].北京:中国水利水电出版社,2009.
[9]王吉忠,杨辉,王苏岩.CFRP加固高强混凝土柱试验及有限元分析[J].武汉大学学报(工学版),2008,41(增刊):6-10.
[10]郝文化,肖新标.ANSYS7.0实例分析与应用[M].北京:清华大学出版社,2004.
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