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Seismic evaluation of ordinary RC buildings retrofitted with externally bonded FRPs using a reliability-based approach

机译：使用基于可靠性的方法对装有外部粘结FRP的普通RC建筑物进行抗震评估

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Despite the extensive literature on reinforced concrete (RC) members retrofitted with fiber-reinforced polymer (FRP) composites, few studies have employed a reliability-based approach to evaluate the seismic performance of RC buildings in terms of their collapse capacity and ductility. In this study, the performance of a poorly-confined RC building structure is investigated for different FRP retrofitting schemes using different configurations and combinations of wrapping and flange-bonded FRPs, as two well-established techniques. A nonlinear pushover analysis is then implemented with a computational reliability analysis based on Latin Hypercube Sampling (LHS) to determine the collapse capacity and ductility of the case-study structure. The variations in material properties and applied loads are examined using a rational probabilistic procedure. The results demonstrate the effectiveness of the reliability approach as it is capable of providing reliable and accurate comparisons between the retrofitting schemes implemented. In addition, the failure modes of the original and retrofitted frames are scrutinized for a more detailed study. It was found that the failure mode of the case-study building is remarkably dependent on the variations of both the input parameters and the adopted retrofitting scheme.
机译：尽管有大量文献报道了用纤维增强聚合物（FRP）复合材料翻新的钢筋混凝土（RC）构件，但很少有研究采用基于可靠性的方法来评估RC建筑物的抗震能力和延展性。在这项研究中，作为两种公认的技术，针对使用不同配置以及包裹式和法兰粘结式FRP组合的不同FRP改造方案，研究了密闭性较差的RC建筑结构的性能。然后，基于拉丁文超立方体抽样（LHS），通过计算可靠性分析来实现非线性下垂分析，以确定案例研究结构的塌陷能力和延展性。使用合理的概率程序检查材料特性和施加的载荷的变化。结果证明了可靠性方法的有效性，因为它能够在所实施的改造方案之间提供可靠而准确的比较。此外，还要仔细检查原始框架和改装框架的失效模式，以进行更详细的研究。结果发现，案例研究大楼的故障模式明显取决于输入参数和所采用的改造方案的变化。

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