Research on Sampling Method for High Performance Standardized Steel Structure

Whether the quality of high-efficiency standardized steel structure can meet the requirements needs to be judged by quality inspection, and sampling inspection is currently the most commonly used method. According to the mathematical basis of counting sampling inspection, the binomial distribution was used to analyze the sampling scheme of the current specification, and the application risks of the user and the producer were given when the AQL of the received quality limit is 5% and 10%, respectively, which is conducive to the establishment of a clear understanding of risk for the producer and the user of the steel structure. At the same time, for the two cases of the AQL of the received quality limit being 3% and 8%, the determination guidelines were formulated and the risks of the user and the producer were clarified, which It can be used for quality checking of projects with higher quality requirements. For the inspection process for isolated batches of structural steel: for the cases of priority protection of the user, the analysis should be carried out for different levels of inspection, for cases with limit quality LQ of 5%, 10%, 15%, and 20%, respectively; for the case of priority protection of the producer, the analysis should be carried out for different levels of inspection, with acceptance quality limit ALQ of 5% and 10%, respectively; thus, a sampling plan for each inspection level, can be provided with priority protection for the user or priority protection for the producer.