Research On Seismic Resilience Assessment Method Of Hospital Systems

Hospital system is one of the main undertakers of post-earthquake emergency rescue.However,as the earthquake disaster bearing object,hospital system itself is also easy to be damaged during earthquakes.Apart from structural components,nonstructural components and inside equipment are also easy to be damaged under earthquakes,which significantly affects the functionality of post-earthquake emergency rescue.The seismic safety of buildings and quickly recovery ability of post-earthquake functionality constitute the dualistic attributes of the seismic resilience of buildings.Researches of this thesis focus on seismic resilience assessment of hospital systems.The main research works are summarized as follows:(1)A general floor response spectrum for seismic tests of nonstructural components is developed.Seismic fragility models of typical medical equipment are developed based on shaking table tests.A state-of-the-art review of floor acceleration response spectra is presented.Different methods for generating floor response spectra and the parameters influencing floor response spectra are analyzed.Current researches on floor response spectrum for evaluating seismic performance of nonstructural components are summarized.General floor response spectrum for shaking table tests of nonstructural components was established based on nonlinear time history analysis of standard frame structures,which can be used in seismic performance tests of nonstructural components and equipment.Shaking table tests of different types medical equipment were conducted using the proposed response spectrum.Seismic responses of these medical equipment were analyzed.Damage limit states were defined and the corresponding seismic fragility curves of the tested medical equipment were generated based on the test results.(2)A framework to quantitatively evaluate the seismic resilience of hospital systems is proposed.The seismic resilience of emergency department was evaluated using state tree method.A multilevel analysis model of hospital system is built,which is composed of component level,subsystem level and system level.The importance factors of different components are determined based on expert questionnaire survey.The resilience demands are quantified using post-earthquake recovery time considering emergency functionality and complete functionality recovery.The expected resilience demand values on different functionalities are determined.A framework to quantitatively evaluate the seismic resilience of hospital systems is proposed based on seismic damage and repair of components.The state tree model of emergency department is developed.The system fragility of emergency department is defined based on state tree method.The quantified functionality index of emergency department is proposed.The seismic fragility of complex systems is quantified using Monte Carlo simulation.(3)A benchmark model for seismic resilience assessment of city-level engineering systems is developed.Post-earthquake health care service accessibility is analyzed considering seismic damage to infrastructure systems.A benchmark model for seismic resilience assessment of cities is developed based on Geographic Information System(GIS)platform.The basic information,demographics,site conditions,building information,infrastructure information are included in the model,as well as seismic fragility models,consequence models,and recovery models.The benchmark model can be used for comparison of different seismic resilience assessment methods and calibration of the evaluation results.Urban health care service functionality is quantified using available number of medical staffs and patient beds.Based on the benchmark city model,urban traffic capacity analysis is conducted considering the effects of building collapse and damage to transportation system.Health care service accessibility considering seismic damage is conducted and the effects of different earthquake magnitudes are investigated.