Research On Disaster Safety Evaluation System And Improvement Strategy Of Rural Masonry Building Complex

With the implementation of the rural revitalization strategy,the country is paying more attention to the development and construction of rural areas.As a place for residents to live and live in rural areas,masonry buildings are highly vulnerable and pose safety hazards due to the impact of natural environment,socio-economic conditions,meteorological,geological,and ecological disaster factors.In order to effectively respond to complex natural disasters in rural areas,comprehensive,effective,and reliable comprehensive evaluation techniques must be adopted to digitally evaluate rural masonry buildings from the perspective of disaster safety,making the risks of rural buildings under the influence of various natural disasters transparent,and providing theoretical support for improving rural housing safety.The main research content and results of this article are as follows:(1)The combination weighting method and geographic information system(GIS)coupling evaluation method was proposed to improve the accuracy and efficiency of disaster safety evaluation for rural masonry building clusters.This paper first analyzed the quantitative index method of Fuzzy set theory based on triangular fuzzy membership function,then studied the combined weighting problem of analytic hierarchy process and entropy weight method,proposed to use the maximum deviation method to combine subjective and objective weights,and finally analyzed the GIS analysis method to assist in determining the evaluation results of corresponding indexes.(2)After analyzing the disaster situation of rural masonry buildings based on disaster system theory,a disaster safety evaluation index system was established.Firstly,based on the theory of disaster systems,typical disasters in rural areas were analyzed from three aspects:the disaster environment,disaster causing factors,and disaster vulnerability of rural masonry buildings.It was determined that the main causes of disaster in rural masonry buildings were the site,construction,and use of the building.Then,in combination with relevant national regulations and standards on building safety construction,a "building site" was established 21 evaluation indicators for disaster safety of rural masonry buildings based on the five criteria of "building form","wall conditions","building integrity",and "usage situation".(3)The feasibility and applicability of the evaluation system were verified through example evaluation.Finally,based on the current evaluation status,strategies for improving the safety of masonry building clusters were proposed.Firstly,GIS was used to evaluate the site conditions of the example.The results showed that the soil salinity in the study area was mild saline soil,and the geological conditions belonged to the "good" level.All buildings met the evacuation requirements,and 57 buildings were in the fire blind area.Then,the evaluation results of masonry buildings are obtained by coupling the GIS analysis results with the combination weighting method.The evaluation results show that:before the reconstruction,the disaster safety levels of 7 buildings are "Level 1",99 buildings are "Level 2",109 buildings are "Level 3",and 19 buildings are "Level 4";After the renovation,there are 6 buildings with a disaster safety level of "1",86 buildings with a level of "2",112 buildings with a level of "3",and 30 buildings with a level of "4".Finally,based on the evaluation results,improvement strategies were proposed to mitigate the impact of saline alkali soil,geological planning,emergency transportation construction,fire planning,reinforcement methods,and feedback systems.