碳纤维加固RC框架结构抗震性能

Research on Seismic Performance for Reinforced Concrete Frame Structure With Hybridized CFRP

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 charac- ter of the node, and steel stress growth changes and structural dynamic characteristics, and with the ordinary frame- work 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.