The present paper deals with real-life bridge structure and evaluates the reliability function with the help of the universal generating function technique where the components of the system have different performance states. The bridge system (complex) is known as the combination of series and the parallel system where the system cannot be simplified into pure series or pure parallel structure. Universal generating function technique can find the performance of the system as a whole depends upon the overall performance of the components where these components are independent and identically distributed. Also, expected time Barlow–Proschan index, tail signature and signature of the proposed complex system using Owen’s and Boland methods have been calculated.

本文研究了现实生活中的桥梁结构，并借助通用生成函数技术评估了可靠性函数，其中系统组件具有不同的性能状态。桥接系统（复杂系统）称为串联系统和并联系统的组合，其中系统无法简化为纯串联或纯并联结构。通用生成函数技术可以发现整个系统的性能取决于组件的整体性能，其中这些组件是独立且相同分布的。此外，还计算了预期时间Barlow–Proschan索引，尾部签名以及使用Owen和Boland方法提出的复杂系统的签名。