Petrinja, Croatia December 29, 2020, Mw 6.4 Earthquake Joint Reconnaissance Report (JRR)
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Research Collection Report Petrinja, Croatia December 29, 2020, Mw 6.4 Earthquake Joint Reconnaissance Report (JRR) Author(s): Miranda, Eduardo; Brzev, Svetlana; Bijelic, Nenad; Arbanas, Željko; Bartolac, Marko; Jagodnik, Vedran; Lazarević, Damir; Mihalić Arbanas, Snježana; Zlatović, Sonja; Acosta, Andrés; Archbold, Jorge; Bantis, James; Borozan, Jovana; Božulić, Ivana; Blagojević, Nikola; Cruz, Cristian; Dávalos, Héctor; Fischer, Erica; Gunay, Selim; Hadzima-Nyarko, Marijana; Heresi, Pablo; Lignos, Dimitrios; Lin, Ting; Marinković, Marko; Messina, Armando; Miranda, Sebastian; Poulos, Alan; Scagliotti, Giulia; Tomac, Ingrid; Tomic, Igor; Ziotopoulou, Katerina; Žugić, Željko; Robertson, Ian Publication Date: 2021-01 Permanent Link: https://doi.org/10.3929/ethz-b-000465058 Originally published in: Joint Reconnaissance Report PRJ-2959, http://doi.org/10.17603/DS2-1W0Y-5080 Rights / License: In Copyright - Non-Commercial Use Permitted This page was generated automatically upon download from the ETH Zurich Research Collection. 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ETH Library PETRINJA, CROATIA DECEMBER 29, 2020, Mw 6.4 EARTHQUAKE JOINT RECONNAISSANCE REPORT (JRR) Collapsed unreinforced masonry building on Strossmayer St. in Petrinja, Photo by Damir Lazarević January 2021 PETRINJA, CROATIA DECEMBER 29, 2020, Mw 6.4 EARTHQUAKE JOINT RECONNAISSANCE REPORT (JRR) Joint Reconnaissance Team Leaders: Eduardo Miranda, Stanford University Svetlana Brzev, University of British Columbia / SUZI-SAEE Nenad Bijelić, Swiss Federal Institute of Technology Lausanne (EPFL) Field Assessment Structural Team (FAST) Authors: (in alphabetical order) Željko Arbanas, University of Rijeka Marko Bartolac, University of Zagreb Nenad Bijelić, Swiss Federal Institute of Technology Lausanne (EPFL) Vedran Jagodnik, University of Rijeka Damir Lazarević, University of Zagreb Snježana Mihalić Arbanas, University of Zagreb Sonja Zlatović, Zagreb University of Applied Sciences Virtual Assessment Structural Team (VAST) Authors: (in alphabetical order) Andrés Acosta, Stanford University Dimitrios Lignos, EPFL Jorge Archbold, UC Berkeley Ting Lin, Texas Tech University James Bantis, Stanford University Marko Marinković, University of Belgrade Jovana Borozan, SUZI-SAEE Armando Messina, Stanford University Ivana Božulić, EPFL Sebastián Miranda, Univ. del Desarrollo Nikola Blagojević, ETH Zurich Alan Poulos, Stanford University Cristian Cruz, Univ. Técnica Federico Santa María Giulia Scagliotti, Stanford University Héctor Dávalos, Universidad Panamericana Ingrid Tomac, UC San Diego Erica Fischer, Oregon State University Igor Tomić, EPFL Selim Gunay, UC Berkeley Katerina Ziotopoulou, UC Davis Marijana Hadzima-Nyarko, J.J. Strossmayer U of Osijek Željko Žugić, PIMO Government of Serbia Pablo Heresi, Univ. Técnica Federico Santa María Virtual Assessment Structural Team (VAST) Editors: Ian Robertson, University of Hawaii JRR: Petrinja December 29, 2020 Earthquake PRJ-2959 | Released: Jan 22, 2021 Building Resilience through Reconnaissance 2 PREFACE The present report is a collaboration between the Learning From Earthquakes (LFE) Program of the Earthquake Engineering Research Institute (EERI) and the Structural Extreme Events Reconnaissance (StEER) Network. The Earthquake Engineering Research Institute is the leading non-profit membership organization that connects those dedicated to reducing earthquake risk. Its multidisciplinary members include engineers, geoscientists, social scientists, architects, planners, emergency managers, academics, students, and other like-minded professionals. EERI has been bringing people and disciplines together since 1948. The objective of the Earthquake Engineering Research Institute is to reduce earthquake risk by (1) advancing the science and practice of earthquake engineering, (2) improving understanding of the impact of earthquakes on the physical, social, economic, political, and cultural environment, and (3) advocating comprehensive and realistic measures for reducing the harmful effects of earthquakes. The National Science Foundation (NSF) awarded a 2-year EAGER grant (CMMI 1841667) to a consortium of universities to form the Structural Extreme Events Reconnaissance (StEER) Network (see https://www.steer.network for more details). StEER builds societal resilience by generating new knowledge on the performance of the built environment through impactful post-disaster reconnaissance disseminated to affected communities. StEER achieves this vision by: (1) deepening structural engineers’ capacity for post-event reconnaissance by promoting community-driven standards, best practices, and training, as well as their understanding of the effect of natural hazards on society; (2) coordination leveraging its distributed network of members and partners for early, efficient and impactful responses to disasters; and (3) collaboration that broadly engages communities of research, practice and policy to accelerate learning from disasters. StEER works closely with other extreme event reconnaissance organizations and the Natural Hazards Engineering Research Infrastructure (NHERI) to foster greater potentials for truly impactful interdisciplinary reconnaissance after disasters. Under the banner of NHERI's CONVERGE node, StEER works closely with the wider Extreme Events Reconnaissance consortium including the Geotechnical Extreme Events Reconnaissance (GEER) Association and the networks for Nearshore Extreme Event Reconnaissance (NEER), Interdisciplinary Science and Engineering Extreme Events Research (ISEEER) and Social Science Extreme Events Research (SSEER), as well as the NHERI RAPID equipment facility and the NHERI DesignSafe Cyberinfrastructure (CI), long-term home to all StEER data and reports. While the StEER network currently consists of the three primary nodes located at the University of Notre Dame (Coordinating Node), University of Florida (Atlantic/Gulf Regional Node), and University of California, Berkeley (Pacific Regional Node), StEER aspires to build a network of regional nodes worldwide to enable swift and high quality responses to major disasters globally. JRR: Petrinja December 29, 2020 Earthquake PRJ-2959 | Released: Jan 22, 2021 Building Resilience through Reconnaissance 3 For more information about the Earthquake Engineering Research Institute please visit the EERI website: https://www.eeri.org/ In particular, for a full listing of over 300 different earthquakes occurring in more than 50 countries during the last 70 years for which the EERI’s Learning From Earthquakes program has created products (Virtual Earthquake Reconnaissance Team (VERT) reports, datasets, and publications) please visit the EERI LFE website: http://www.learningfromearthquakes.org/ For more information about the Structural Extreme Events Reconnaissance (StEER) Network please visit the StEER website: https://www.steer.network/ In particular, for a full listing of all StEER products (briefings, reports and datasets) please visit this StEER website: https://www.steer.network/products JRR: Petrinja December 29, 2020 Earthquake PRJ-2959 | Released: Jan 22, 2021 Building Resilience through Reconnaissance 4 ACKNOWLEDGMENTS Conducting post-earthquake reconnaissance is critically important to observe, document and analyze the seismic performance of built and natural environments. While experimental work in the laboratory and analytical modelling are extremely valuable, we will continue to rely on post- earthquake reconnaissance for many years to come to learn about and understand the effects of earthquakes on full-scale three-dimensional structures in the field which provide the ultimate test of our progress in mitigating the effects of earthquakes on structures and society. Hence, post-earthquake reconnaissance is at the very core of the missions of both the EERI’s Learning From Earthquakes (LFE) program and of the Structural Extreme Events Reconnaissance (StEER) Network. This report is the result of hard swift work and contributions by a large number of individuals and organizations, both in Croatia and in many other countries that worked day and night for nine days during New Year and Epiphany holidays to put together the present report on the Petrinja December 29, 2020 earthquake. We received valuable and continuous support from the Croatian Center for Earthquake Engineering (HCPI by its initials in Croatian). HCPI provided logistic support to our field group including safety equipment, power banks, materials for evaluation of buildings, means of transportation, as well as food. Additionally, HCPI provided information and guidance about the various affected areas as well as assisted in understanding and documenting local construction practices. Special thanks also go to the Croatian Seismological Survey (CSS) of the Faculty of Science at the University of Zagreb who generously shared information about ground motion recorded as a result of this event. Efforts to install and maintain seismic instrumentation as well as to retrieve, process and disseminate strong motion records are key to our ability to learn about the effects of earthquakes and to mitigate the effects of earthquakes on man-made structures and on society in general. Their assistance is greatly appreciated. Prof. Matjaz Dolsek of the Faculty of Civil and Geodetic Engineering at the University of Ljubljana in Slovenia provided information on the performance of the Krsko nuclear power plant on the border of Croatia with Slovenia. We thank the Serbian Association for Earthquake Engineering