碳纤维加固RC框架结构抗震性能
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摘要
利用ANSYS软件对一栋三层钢筋混凝土框架结构进行了抗震性能分析,研究了碳纤维加固框架结构在地震作用下,节点的受力和变形特征、梁柱纵筋的应力增长变化以及结构动力特性等,并与普通框架结构进行对比分析。结果表明:加固后框架结构的楼层最大位移较普通结构明显提高,结构的延性显著改善,有利于结构的抗震。在节点处采用外包碳纤维布加固,可以提高框架柱的抗弯能力,使塑性铰首先出现在梁端,钢筋混凝土框架结构在地震作用下,破坏时更接近"强柱弱梁"的特点。
A seismic performance model was established with Ansys software for a three-floor reinforced concrete frame structure.Studies of carbon fiber reinforced frame structures under earthquake,stress and deformation character of the node,and steel stress growth changes and structural dynamic characteristics,and with the ordinary framework for comparative analysis.The results show that:reinforced frame structure floor displacement than ordinary structure improved and significant improvement in ductility of the component.It is also shown that for carbon fiber reinforced frame structures,the yielding time of column reinforce bar will shift to a later time,which tend to exhibit a failure type closer to strong column and weak beam characteristics.
A seismic performance model was established with Ansys software for a three-floor reinforced concrete frame structure.Studies of carbon fiber reinforced frame structures under earthquake,stress and deformation character of the node,and steel stress growth changes and structural dynamic characteristics,and with the ordinary framework for comparative analysis.The results show that:reinforced frame structure floor displacement than ordinary structure improved and significant improvement in ductility of the component.It is also shown that for carbon fiber reinforced frame structures,the yielding time of column reinforce bar will shift to a later time,which tend to exhibit a failure type closer to strong column and weak beam characteristics.
引文
[1]GB50010-2001建筑抗震设计规范[S].
[2]苏幼坡,张玉敏,王绍杰,徐建新.从汶川地震看提高建筑结构抗倒塌能力的必要性和可行性[J].土木工程学报,2008,6:1-10.
[3]Lafave J M,Wijht J K.Reinforced concrete exterior beam-column-stab connections subjected to lateral earthquake loading[J].ACI Structural Jour-nal,1999,96(4):577-585.
[4]Maalej M,Leong K S.Effect of beam size and FRP thickness on interfacial shear stress concentration and failure mode of FRP-strengthened beams[J].Composites Science and Technology,2005,65:1148-1158.
[5]谢剑,刘明学,赵彤.碳纤维布提高高强混凝土柱抗震能力评估方法[J].天津大学学报,2005,38(2):109-113.
[6]陆洲导,宋彦涛,王李果.碳纤维加固混凝土框架节点的抗震试验研究[J].结构工程师,2004,20(5):39-43.
[7]王苏岩,韩克双.纤维增强复合材料(FRP)加固混凝土柱的性能研究进展[J].地震工程与工程振动,2004,(24)1:97-104.
[8]赵彤,刘明国,谢剑,张景明.应用碳纤维布增强钢筋混凝土柱抗震能力的研究[J].地震工程与工程振动,2000,(4):66-72.
[9]李静,钱稼茹,蒋剑彪.纤维布(FS)约束混凝土矩形柱轴心受压试验及非线性有限元分析[J].建筑结构学报,2004,25(2):110-117.
[2]苏幼坡,张玉敏,王绍杰,徐建新.从汶川地震看提高建筑结构抗倒塌能力的必要性和可行性[J].土木工程学报,2008,6:1-10.
[3]Lafave J M,Wijht J K.Reinforced concrete exterior beam-column-stab connections subjected to lateral earthquake loading[J].ACI Structural Jour-nal,1999,96(4):577-585.
[4]Maalej M,Leong K S.Effect of beam size and FRP thickness on interfacial shear stress concentration and failure mode of FRP-strengthened beams[J].Composites Science and Technology,2005,65:1148-1158.
[5]谢剑,刘明学,赵彤.碳纤维布提高高强混凝土柱抗震能力评估方法[J].天津大学学报,2005,38(2):109-113.
[6]陆洲导,宋彦涛,王李果.碳纤维加固混凝土框架节点的抗震试验研究[J].结构工程师,2004,20(5):39-43.
[7]王苏岩,韩克双.纤维增强复合材料(FRP)加固混凝土柱的性能研究进展[J].地震工程与工程振动,2004,(24)1:97-104.
[8]赵彤,刘明国,谢剑,张景明.应用碳纤维布增强钢筋混凝土柱抗震能力的研究[J].地震工程与工程振动,2000,(4):66-72.
[9]李静,钱稼茹,蒋剑彪.纤维布(FS)约束混凝土矩形柱轴心受压试验及非线性有限元分析[J].建筑结构学报,2004,25(2):110-117.
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