Study on Similarity Relationship between Large Span Steel Structure and Stainless Steel Scale Model
Due to factors such as the test scale,site size,and test funding,most structures are unable to conduct vibration table tests on the original structure,especially for large-span steel structures.The size of the rods and joints of the scaled model of long-span steel structures with small geometric similarity is small,so it is difficult to use the same material as the prototype structural materials.Stainless steel materials are easy to process and suit-able to replace prototype structural materials in making scaled models.However,there are differences in mechani-cal properties between stainless steel and prototype structural materials,and the difference in the yield strength is the main problem when designing stainless steel scale models.Therefore,this paper conducts research on the stress similarity ratio of stainless steel scale models.First,the quasi-dimensional method is used to deduce the similarity relationship between the scale model considering the difference in material yield strength and the pro-totype structure,and the formula for calculating the similarity ratio of main performance indicators is obtained.Then,using Midas Gen software,a finite element model of the prototype structure of the lattice shell and a stain-less steel scaled model was established,and static analysis and natural vibration characteristics analysis was car-ried out to verify the rationality of the theoretical derivation of the similarity ratio calculation formula.This article can provide theoretical reference for the design of stainless steel scaled models.
large span spatial structurereduced scale modelstainless steelstress similarity relationshipyield strength
万方数据
维普
