Abstract: Based on optimum criterion method of system failure model analyses, a theoretical analysis method of generalized strength failure model for steel structure system is advanced, calculating software GSFMA is also developed. The steel structure of space parking system is taken as engineering examples. The analysis results are shown selected rational control parameter X not only improves calculating efficiency but also ensures veracity of reliability calculating. First failure element in failure tree is resource of causing other elements failure, therefore reinforce first failure element is the most rational and economic method that ensure steel structure no failure. The analysis calculating method and the calculating software-GSFMA are originated and effective.

Key words: Failure model, Generalized strength, Space parking system, Steel structure system