Theoretical Research And System Development On Safety Assessment And Early Warning In Spatial Structures

With Beijing Olympic Games 2008, Shanghai World Expo 2010 etc. have been held, the domestic application of long-span spatial structures into a new period of vigorous development. Involving the spatial structure of a major public safety, in-depth analysis of health monitoring data to properly evaluate the structural safety of the state, in order to achieve effective early warning of disasters has become a large span space structure is an important area of work.For specific areas of long-span spatial structures for safety evaluation, our country both in theory and methods in assessing the technology are still to be systematic research, structural health monitoring system in space research and development is also fundamental Exploration; long-span structures in the complex life of the change in operating characteristics to study the lack of depth, so the objective has not been established in respect of a unified field of normative standards, the industry analysis of the phenomenon of re-monitoring very serious light.Based on the background, this paper affect the safety of large span space structure fully into account various factors and analysis of the characteristics on the basis of structural security indicators reflected in the behavior of the coupling effect on the core ideas, the research ideas from the traditional single-factor, single-item Extension of warning to the health monitoring of the process of how existing technology can be obtained under conditions of a large number of different types of structural state of the integration of the measured information to maximize utilization.This article first research on a specific spatial structure in the context of the assessment of disaster early warning connotation and denotation to early warning and assessment for the two logical clues, established a conceptual framework for this study; and in a wide range of civil engineering Condition Assessment of cross-cutting area on the basis of the results for indicators of long-span spatial structure of multi-, multi-level, multi-objective characteristics of the analytic hierarchy structure is introduced into the field of this special assessment to disaster warning;Subsequently, the basic theory of AHP and the assessment process for the research framework, and a large span space structure and characteristics of the core structure is discussed in detail in the context of long-span spatial structure of AHP to assess the specific methods disaster early warning established using the AHP assessment of the spatial structure of disaster early warning procedures and processes to achieve safety on the spatial structure condition assessment, and based on the assessment of effective early warning purposes;Then, the traditional AHP in assessing the security status of large span space structure on the "one size fits all" limitations, the introduction of fuzzy theory on how AHP based on fuzzy evaluation was focused on the interpretation of a study based on the research, level of analysis in the assessment framework of organic integration into the concept of fuzzy comprehensive evaluation, and finally the concrete floor to the actual monitoring of long span steel structure carried out quantitative analysis and evaluation methods described in this article is applicable to prove in the spatial structure characteristics of this structure is feasible.Finally, based on the former research of large span space structure theory of disaster early warning assessment has been based on the results of AHP-based fuzzy comprehensive assessment of thinking as the core of the large span space structure assessment of disaster early warning system for the overall architecture and initial development.