Study On The Sensitivity Of The Structures' Properties Caused By Bias Of Manufacturing Deviation And Erecting Variation Of Steel Structures

In this paper, the mechanical behaviors of single-story and multi-story structural steel frames are studied respectively based on the probability sensitive theory, taking into account the maximum stresses, the maximum deformations, the buckling characteristic values and the geometrical non-linear stablility capacity as output parameters. In the study, the PDS module of the finite element analysis software is employed, and some conclusions obtained will show implications for ensuring the safety and quality of structural steel construction.In the analysis, the single-story one-span and single-story two-span structural steel plants are selected as single-story structural analysis model, and the six-story two-span plant as multi-story structural analysis model. The statistical distribution of deviation in structural steel manufacturing and erecting is obtained by referring to the existing statistical distribution of structural steel components and construction deficiency. Monte Carlo method is employed to conduct the probability analysis and the Latin hypercube sampling method is used as well. The correlation between the input parameters and the output parameters is calculated according to the Spearman's rank correlation coefficient. Meanwhile, it can be know whether it is sensitive for the mechanical behaviors to deviations in structural steel manufacturing and erecting and to what extent of the sentivity, based on the well established significant level. Then, the key sensitive factors which need to be controlled in construction can be indentified.Then, according to the sensitivity research, it research when the key sensitive exist at the same time, the structures'properties changing with deviation. It evaluate the current norms, and given the reasonable suggestion to control the bias of manufacturing deviation and erecting variation of steel structures.