Investigation on the Mathematical Relation Model of Structural Reliability and Structural Robustness

Structural reliability and structural robustness, from different research fields, are usually employed for the evaluative analysis of building civil engineering structures. has been widely used optimization design, while robustness is still in rapid development. Several dimensionless evaluation indexes have defined so far, such as reliability-based redundancy index. However, these based on subjective definitions, they also difficult to put into practice. The mathematical relational model between not established yet. This paper a quantitative study, focusing relation further develop theory robustness. A strain energy index introduced firstly by considering principle. then derived followed comparative study sensitivity, damage, random variation factor. cantilever beam truss presented two case studies. In this parabolic curve established. significant trend their sensitivities observed. complex interaction mechanism joint effect damage factor reflected. With consideration that affected degrees (mild impairment, moderate severe impairment), three-stage framework life-cycle maintenance management proposed. can help us gain better understanding reliability. Some practical references provided decision-making departments.