In this study, a new formulation for structural fragility function based on the theory of state-based philosophy (SBP) is introduced. In this innovative approach, gradual changes in stiffness (or flexibility) of the structure is considered as a firm base for describing changes in the state of the structure due to damage from various sources. In this study, the source of damage data is considered ground motions. After formulating state changes by using SBP theory, a new fragility function is proposed. Therefore, this new function is based on observations of various failure stages of the structure and, besides, it is organized specifically for the structural damage data. In order to prove the accuracy of this method, some special moment frames (SMFs) are modeled, and incremental dynamic analysis (IDA) is performed on them. Thus damage data are provided as initial input to the fragility function. After that, the final results of the SBP fragility function are compared with the results of the conventional methods of plotting the fragility curve, and lastly, the fragility curve’s accuracy obtained by using this new function is verified. This new fragility function is called ‘SBP fragility function’ and has some advantages over the ordinary fragility functions, which are discussed in this article.

在这项研究中，介绍了一种基于状态哲学（SBP）理论的结构脆性函数新公式。在这种创新方法中，结构刚度（或柔韧性）的逐渐变化被认为是描述由于各种来源的损坏而导致的结构状态变化的坚实基础。在这项研究中，破坏数据的来源被视为地震动。在利用SBP理论表达状态变化之后，提出了一种新的脆弱性函数。因此，此新功能基于对结构各个失效阶段的观察，此外，它是专门针对结构损伤数据进行组织的。为了证明该方法的准确性，对一些特殊矩框架（SMF）进行了建模，并对它们进行了增量动态分析（IDA）。因此，将损坏数据作为对脆弱性功能的初始输入。之后，将SBP脆​​弱性函数的最终结果与传统的绘制脆弱性曲线方法的结果进行比较，最后，验证了使用该新函数获得的脆弱性曲线的准确性。这个新的脆弱性函数称为“ SBP脆弱性函数”，它比普通脆弱性函数具有一些优势，本文将对此进行讨论。