A Structural Safety Assessment Method for Space Steel Structures Under Environmental Loads

Abstract

The invention provides a structure safety evaluation method under the action of environmental loads of a space steel structure. The structure safety evaluation method under the action of the environmental loads of the space steel structure comprises the steps that S1, environmental load partitioning is conducted on the structure on the basis of existing monitoring data; S2, a method for determining values of non-uniform distributed loads on structure partitions is determined; S3, a structural stress monitoring data evaluation threshold is set; S4, simulation analysis of structural stress field distribution under the action of the actual environmental loads is conducted through operation of finite element software and combination between the existing structure partitions and partition load values; S5, stress response data of the structure are extracted to be evaluated. According to the structure safety evaluation method under the action of the environmental loads of the space steel structure, good simulation of non-uniform distribution of actual temperature loads and actual wind loads of the space steel structure is achieved through utilization of existing temperature measured data and wind speed and pressure monitoring data of a health monitoring system, and therefore identification of a whole stress field under the action of the environmental loads of the structure is achieved; meanwhile, due to the fact that stress of rod pieces at measuring points and rod pieces which are not arranged at the measuring points is evaluated, the problems which can be caused in the process that whole stress safety of the structure is evaluated only through the finite stress measuring points are solved.

Description

technical field [0001] The invention relates to the field of civil engineering structure health monitoring and monitoring data information processing, in particular to a structural safety assessment method for a space steel structure under environmental loads. Background technique [0002] Since the current health monitoring system is relatively mature in bridge structural engineering, most of the existing structural state assessment methods are proposed for bridge structures. The theories adopted mainly focus on reliability theory, analytic hierarchy process, fuzzy theory, neural network and so on. At the same time, due to the late start of the space structure, the research on the safety state assessment technology of the structure is not perfect, and the span of the space structure itself, the large-area distribution and the architectural characteristics of the main material are mainly steel, which are obviously different from bridges and other concrete structures. The ma...

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Problems solved by technology

At the same time, due to the late start of the space structure, the research on the safety state assessment technology of the structure is not perfect, and the span of the space structure itself, the large-area distribution and the architectural characteristics of the main material are mainly steel, which are obviously different from bridges and other concrete structures. main architecture, making it difficult to apply more mature security assessment techniques in these fields

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