吕大刚, 代旷宇, 于晓辉, 李宁. FRP加固非延性RC框架结构的地震易损性分析[J]. 工程力学, 2017, 34(增刊): 49-53,70. DOI: 10.6052/j.issn.1000-4750.2016.04.S019
引用本文: 吕大刚, 代旷宇, 于晓辉, 李宁. FRP加固非延性RC框架结构的地震易损性分析[J]. 工程力学, 2017, 34(增刊): 49-53,70. DOI: 10.6052/j.issn.1000-4750.2016.04.S019
LÜ Da-gang, DAI Kuang-yu, YU Xiao-hui, LI Ning. SEISMIC FRAGILITY ANALYSIS ON NON-DUCTILE RC FRAME STRUCTURES RETROFITTED WITH FRP[J]. Engineering Mechanics, 2017, 34(增刊): 49-53,70. DOI: 10.6052/j.issn.1000-4750.2016.04.S019
Citation: LÜ Da-gang, DAI Kuang-yu, YU Xiao-hui, LI Ning. SEISMIC FRAGILITY ANALYSIS ON NON-DUCTILE RC FRAME STRUCTURES RETROFITTED WITH FRP[J]. Engineering Mechanics, 2017, 34(增刊): 49-53,70. DOI: 10.6052/j.issn.1000-4750.2016.04.S019

FRP加固非延性RC框架结构的地震易损性分析

SEISMIC FRAGILITY ANALYSIS ON NON-DUCTILE RC FRAME STRUCTURES RETROFITTED WITH FRP

  • 摘要: 对FRP加固非延性RC框架结构的地震易损性进行分析。以3层、6层和9层非延性RC框架结构为研究对象,针对三种不同的FRP加固方案,分别采用云图法和Pushover方法对结构的地震需求和抗震能力进行分析。通过对比FRP加固前后非延性RC框架结构的地震易损性,评估FRP加固方法对非延性RC框架结构抗震性能的影响。研究结果表明:FRP加固方法可以有效提高非延性RC框架结构抗震性能。在所采用的FRP加固方案中,底层关键楼层加固方案对非延性RC框架结构的抗震性能改善作用最为明显。此外,FRP加固方法对非延性RC框架结构的性能改善作用与结构高度相关,结构越高,FRP加固效果越差。

     

    Abstract: Seismic fragility analysis is performed for non-ductile reinforced concrete (RC) frame structures retrofitted by FRP. Three non-ductile RC frames designed with 3, 6 and 9 stories are used as the study cases. Three different rehabilitation strategies are adopted for each case structure. The cloud method and the Pushover method are used for the assessment of seismic demand and seismic capacity, respectively. The derived seismic fragility for the non-ductile RC frames retrofitted w/o FRP is compared to evaluate the effect of FRP rehabilitation. The results show that FRP rehabilitation is an effective alternative to improve the seismic performance of non-ductile RC frame structures. Among the adopted rehabilitation strategies, the one used to strengthen the lower stories can mostly promote the seismic capacity of the non-ductile RC frames. Moreover, the improvement of structural performance due to FRP rehabilitation is related to the height of the non-ductile RC frames. With a given rehabilitation strategy, the higher the frame is, the less improvement on structural performance is obtained.

     

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