Study On Evalution Of Seismic Resilience Of Water Supply System

Trace to the source,resilience is a basic concept of materials science in the field of physics.In the 1980 s,some scholars first linked the concept of resilience with natural disasters.At the beginning of the 21 st century,the concept of resilient city was first proposed at the United Nations Global Summit on Sustainable Development.Subsequently,studies on community resilience and engineering system resilience emerged gradually and have been developing till now.In 2018,the US national academy of sciences and other institutions compiled a series of books detailing the concept of resilience.At present,the research achievements in the field of seismic resilience of engineering system includes building structure,transportation system,water supply system,power supply system and communication system are relatively few and there is no mature evaluation system.Therefore,the topic of this paper is to carry out related research on the seismic resilience of water supply system based on the previous research results.The thesis mainly completed the following works and achievements:The seismic safety of water supply system was researched.The definition of seismic safety of water supply system is given,and the seismic action at the seismic fortification intensity level that should be adopted in the region is proposed as the reference input.The seismic safety of water supply system is divided into four grades: excellent,good,medium and bad.The damage index model of single component was established.The importance coefficient was calculated by analytic hierarchy process(AHP)and the seismic safety evaluation model of water supply system was established.The results obtained from the model are proved to be in line with the actual situation by example analysis,and the seismic safety of water supply system in the same or different intensity zones can be compared.The methods to improve the seismic safety are summarized from the basic parameters of water supply system and the seismic emergency measures.The post-earthquake recoverability of water supply system was studied.The definition of the post-earthquake recoverability of water supply system is given.The maintenance and repair of the water supply system is proposed based on the local human resource reserve.The post-earthquake recoverability of water supply system is divided into four grades: excellent,good,medium and bad.The function index model of single element was established.In order to simulate the post-earthquake recovery process,the local human resources assessment model was established.The repair time of the water supply system can be calculated according to the repair time of the single component and the required human resources,the restoration cost of water supply system can be calculated according to the loss ratio of single component,and the post-earthquake recoverability assessment model of the water supply system was established.The results obtained from the model are proved to be in line with the actual situation by example analysis,and the post-earthquake recoverability of the water supply system in the same or different intensity zones can be compared after the earthquake.The methods to improve the post-earthquake recoverability of water supply system are summarized from the basic parameters of water supply system and post-earthquake recovery measures.The seismic resilience of water supply system was studied.According to the core connotation of disaster resilience,a seismic resilience evaluation system based on seismic safety evaluation and post-earthquake recoverability evaluation of water supply system was established.The seismic resilience of water supply system is divided into four grades: excellent,good,medium and bad.The water service function based on number of users,which is a hot issue on the water supply system seismic resilience evaluation,was studied.The relationship between the earthquake damage rate and the water service function based on the number of users is established.The proportions of users with normal water supply service function at 4 grades of seismic resilience were evaluated.It is proved by example that the seismic resilience evaluation system of water supply system can be used to horizontally or vertically compare the seismic resilience of water supply system in the same or different intensity zones,and the proportion of users with normal water supply service functions can be obtained in each region under the seismic action at the corresponding seismic fortification intensity level.