Steel grid structure, which can fulfil the needs of long-span spatial sructures, has gained growing popularity at home and abroad. As this structure has a large span and can serve many people , an accident will threaten people life and cause huge economic losses and property loss. There are many collapse and accidents of long-span spatial structures in latest years, so it is important to identify and monitor space grid structure. In the field of identification, there are many mature methods which ...
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