Analysis of Grids Structures with Random Installation DeviationZHOU Fei1,WAN Shu-qi2 (1.Architectural and Planning Design Institute of Guangdong Ad vanced Education,Guangzhou 510631,China; 2.School of Civil Engineering, Wuhan U niversity, Wuhan 430072,China)Based on the assumption of random installation deviation, the finite element met hod analyzing the initial displacement and stress of grid structures was set up. The random installation deviation was assumed as normal distribution. Numerical example showed that the random installation deviation had a large effect on the safety of the grids structures and could not be ignored. It also showed that th e method obtained was significant for the design of grids structures.random installation deviation; grids structure s; normal distribution