Investigation and Analysis of Seismic Damage to Industrial Buildings and Facilities in the Mw 7.8 Turkey Earthquake
On February 6,2023,Turkey′s Kahramanmaraş province experienced two successive earthquakes,with magnitudes of Mw7.8 and Mw7.5,occurring within a short period.Compared with previous earthquakes,this event was characterized by high intensity and double main shocks,resulting in widespread damage.Following the earthquake,a field investigation was conducted on damaged in-dustrial plants and facilities,supported by data collection,to explore the characteristics of the earth-quake′s ground motion.The acceleration response spectra recorded by typical strong-motion stations in Turkey were compared with the seismic design spectra from China′s standards.The seismic damage to typical industrial plants and facilities in Turkey was assessed,and the causes of destruction were an-alyzed.Additionally,typical seismic waves were selected to perform unidirectional seismic analysis on a nuclear power plant(NPP)′s coupling system,exploring its response characteristics under strong ground motion.The results showed that the strength of the earthquake exceeded the highest standard in Chinese seismic codes,with particularly strong vertical ground motion.A series of high-intensity quakes caused severe damage to industrial plants and facilities in the affected area.Many primary struc-tures of the plants collapsed,while non-structural components and production equipment also suffered significant damage.Non-structural damage primarily involved collapsed walls and fallen ceilings.The calculation results of the NPP showed that,under Turkey′s strong earthquake,the acceleration re-sponse of the steam generator exceeded its median seismic capacity,and the stress response of the main pipelines surpassed allowable stress limits.The investigation highlighted that the seismic vulnera-bilities of industrial plants and facilities lay primarily within internal structures and equipment.Strengthening seismic measures for industrial facilities and improving the seismic capacity of industrial equipment are effective strategies to enhance the seismic resilience of industrial plants and facilities.
Turkey earthquakeindustrial plant and facilityindustrial equipmentnon-structure ele-mentreinforced concrete framenuclear power plant coupled system
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