1st Croatian Conference on Earthquake Engineering最新文献

{"title":"PETRINJA M6.2 EARTHQUAKE IN 2020 DAMAGED ALSO SOLID LINEAR INFRASTRUCTURE: ARE THERE SIMILAR ACTIVE FAULTS IN CROATIA?","authors":"Tvrtko Korbar, S. Markušić, D. Stanko, D. Penava","doi":"10.5592/CO/1CROCEE.2021.253","DOIUrl":"https://doi.org/10.5592/CO/1CROCEE.2021.253","url":null,"abstract":"On 29 December 2020 devastating M6.2 earthquake hit well known Petrinja epicentral area, and caused strong damage on many buildings in Petrinja, Sisak, and Glina, as well as on solid modern linear infrastructure (roads, bridges, artificial river embankments, pipelines etc.). The seismic hazard is not depending only on the estimated coseismic ground acceleration that should be used for EUROCODE 8 constructional seismic design, but is also strongly dependent on local soil effects and on the secondary effects of a strong earthquake (landslides, liquefaction, suffosion, etc.). Besides, movement of the crustal blocks along the fault lines that cross the solid objects, in case of surface coseismic rupture such was the Petrinja event, should be evaluated. Local site amplification effects are the results of several physical processes (multiple reflections and diffractions, focusing, resonance, wave trapping) in the overlying superifical deposits and soil, resulting in variable damage distribution that were observed in different local geological units affected by an earthquake. Also, the variable surface topography and various mechanical properties of the terrain such as water table, slopes, presence of heterogeneities, structural discontinuities and cavities, certainly can contribute to the observed damage and increase geological hazard in epicentral area. How many unknown active faults we can identified in Croatia? What could be surface manifestation of a strong earthquake that will occure on a shallow thrust (reverse) fault? Is there any major normal active fault that can surprise seismotectonic experts and civil engineers? The authors published first scientific paper after the Zagreb 22 March 2020 event and are currently working on active tectonics in Kvarner region and Hrvatsko Zagorje. Besides, a new Croatian Science Foundation (HRZZ) project has just been started with special attention on soil dynamic properties and its influence on the seismic hazard of the older cultural buildings in Trakošćan, Šibenik and Dubrovnik.","PeriodicalId":142267,"journal":{"name":"1st Croatian Conference on Earthquake Engineering","volume":"224 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122657800","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Damage assessment after the Zagreb earthquake – The case study of the educational building","authors":"Lukša Lulić, Tvrtko Renić, Michele Škofić, Ivan Hafner, Tomislav Kišiček, M. Stepinac","doi":"10.5592/CO/1CROCEE.2021.197","DOIUrl":"https://doi.org/10.5592/CO/1CROCEE.2021.197","url":null,"abstract":"(1) PhD student, University of Zagreb Faculty of Civil Engineering, e-mail address: luka.lulic@grad.unizg.hr (2) PhD student, University of Zagreb Faculty of Civil Engineering, e-mail address: trenic@grad.unizg.hr (3) PhD student, University of Zagreb Faculty of Civil Engineering, e-mail address: ivan.hafner@grad.unizg.hr (4) Student, University of Zagreb Faculty of Civil Engineering, e-mail address: michele.skofic@grad.unizg.hr (5) Full Professor, University of Zagreb Faculty of Civil Engineering, e-mail address: tomislav.kisicek@grad.unizg.hr (6) Assistant Professor, University of Zagreb Faculty of Civil Engineering, e-mail address: mislav.stepinac@grad.unizg.hr","PeriodicalId":142267,"journal":{"name":"1st Croatian Conference on Earthquake Engineering","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127001437","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Seismic shaking scenarios for city of Zagreb, Croatia","authors":"Helena Latečki, J. Stipčević, I. Molinari","doi":"10.5194/EGUSPHERE-EGU21-8781","DOIUrl":"https://doi.org/10.5194/EGUSPHERE-EGU21-8781","url":null,"abstract":"<p>In order to assess the seismic shaking levels, following the strong Zagreb March 22nd 2020 earthquake, we compute broadband seismograms using a hybrid technique. In a hybrid technique, low frequency (LF, f < 1 Hz) and high frequency (HF, f = 1&#8211;10 Hz) seismograms are obtained separately and then merged into a single time series. The LF part of seismogram is computed using a deterministic approach while for the HF part, we adopt the semi-stochastic method following the work of Graves and Pitarka (2010). For the purposes of the simulation, we also assemble the 3D velocity and density model of the crust for the city of Zagreb and its surrounding region. The model consists of a detailed description of the main geologic structures that are observed in the upper crust and is embedded within a greater regional EPCrust crustal model (Molinari and Morelli, 2011). To test and evaluate its performance, we apply the hybrid technique to the Zagreb March 22nd 2020 Mw = 5.3 event and four smaller (3.0 < Mw < 5.0) events. We compare the measured seismograms with the synthetic data and validate our results by assessing the goodness of fit for the peak ground velocity values and the shaking duration. Furthermore, since the 1880 Mw = 6.2 historic earthquake significantly contributes to the hazard assessment for the wider Zagreb area, we compute synthetic seismograms for this event at two different hypocenter locations. We calculate broadband waveforms on a dense grid of points and from these we plot the shakemaps to determine if the main expected ground-motion features are well-represented by our approach. Lastly, due to the events that occured in the Petrinja epicentral area at the end of 2020, we decided to extend our 3D model to cover the area of interest. We will present the preliminary results of the simulation for the December 29th 2020 Mw = 6.4 strong earthquake, as well as our plans for further research.</p>","PeriodicalId":142267,"journal":{"name":"1st Croatian Conference on Earthquake Engineering","volume":"117 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127808416","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"BASE EARTHQUAKE","authors":"S. Jerković, Nives Škreblin","doi":"10.5592/co/1crocee.2021.277","DOIUrl":"https://doi.org/10.5592/co/1crocee.2021.277","url":null,"abstract":"","PeriodicalId":142267,"journal":{"name":"1st Croatian Conference on Earthquake Engineering","volume":"50 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114098318","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}