Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : September 13, 2020 - September 16, 2020
Conventionally, in designing the strength of machines and structures, it was common to use the allowable stress method of design that uses an empirical safety factor with a sufficient margin in strength. However, since ISO 2394:1973 was published, standards based on limit state method of design that quantitatively evaluates the reliability of materials and structures against damage by means of reliability engineering methods and ensure an appropriate safety margin have been established. The crane design is also similar. In Japan, JIS and construction code for mobile cranes have been established or revised in recent years, and a system that can use the limit state method of design for crane design has been established. In this study, we investigated the difference between the allowable stress method and the limit state method, and the development trend of standards for crane design, and confirmed that the use of the limit state design method in crane design is a global trend.
