| The study on varied-amplitude fatigue behavior of large-span grid structure with hanging cranes is a blank field in the world. On the base of extensive investigation, from the viewpoint of loading, this paper widely discusses the development of fatigue loading spectrum in the fields of aviation, mechanism and civil engineering, listing the main technology standards of hanging crane and the engineering examples of partial grid structure with hanging crane in China, concluding the mechanic methods on tension-resistance fatigue design of bolt in China. America. Germany. Japan and Soviet Union, and some regulations on tension-resistance fatigue design of high-strength bolt by America and Germans- Institute of Steel Construction .On the base of fatigue loading spectrum achievements, combining the characteristics of large-span grid structure with hanging cranes and the using-requirement on fatigue loading spectrum of grid structure with hanging cranes, this paper has firstly put forward the theoretic method for constructing fatigue loading spectrum of grid structure with hanging cranes, organized the relevantprogram--GJFLS. and elementally established the program loadingspectrum .Finally, this paper looks forward to the further researches. |
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