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首页> 外文会议>Sustainable Performance of Concrete Bridges and Elements Subjected to Aggressive Environments: Monitoring, Evaluation amp; Rehabilitation >Response Surface Metamodel-based Performance Reliability for Reinforced Concrete Beams Strengthened with FRP sheets
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Response Surface Metamodel-based Performance Reliability for Reinforced Concrete Beams Strengthened with FRP sheets

机译：FRP片加固钢筋混凝土梁基于响应面元模型的性能可靠性

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摘要

This paper presents the performance reliability of reinforced concrete beams strengthened with fiber reinforced polymer (FRP) sheets, including structural fragility. Emphasis is placed on the development of effective strains that can represent FRP-debonding failure. The reliability predicted by a conventional standard log-normal cumulative probability density function and by the proposed response surface metamodel (RSM) combined with Monte-Carlo simulation (MCS) is employed to assess the contribution of physical attributes to debonding failure. The models are constructed based on a large set of experimental database consisting of 230 test beams collected from published literature. Another aspect of the study encompasses the effect of various RSM parameters on the variation of effective strains, such as FRP thickness (t_f), steel reinforcement ratio (ρ), concrete strength (f'_c), beam height (h), beam width (w), span length (L), and shear span (a). The mutual interaction between these parameters indicates that those related to beam geometry (i.e., L, w, h, and a parameters) and the t_f parameter are significant factors influencing the effective strain of FRP-strengthened beams.
机译：本文介绍了纤维增强聚合物（FRP）片增强的钢筋混凝土梁的性能可靠性，包括结构脆性。重点放在可以代表FRP脱胶失败的有效菌株的开发上。由常规标准对数正态累积概率密度函数和拟议的响应表面元模型（RSM）与蒙特卡洛模拟（MCS）相结合预测的可靠性可用于评估物理属性对脱粘破坏的影响。这些模型是基于大量实验数据库构建而成的，该数据库包含从出版的文献中收集的230条测试光束。研究的另一个方面包括各种RSM参数对有效应变变化的影响，例如FRP厚度（t_f），钢筋比（ρ），混凝土强度（f'_c），梁高（h），梁宽（w），跨度长度（L）和剪切跨度（a）。这些参数之间的相互作用表明与梁几何形状有关的参数（即L，w，h和一个参数）和t_f参数是影响FRP加固梁有效应变的重要因素。

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