Obtaining the Necessary Precision Index on Deformation Observation Based on Reliability Theory

Under the strict of structural safety,this paper treats the measurement error of deformation observation as an equal value load and puts it into load combination,obtains the maximun deformation value Δ under the most disadvantage situation,and from the point of statistics mechanics defines the parameters such as permitting deformation values of deformation object,necessary measurement precision,etc.simple example proves this method reliable.