Mw 6.4 Petrinja earthquake in Croatia: Main earthquake parameters, impact on buildings and recommendation for their structural strengthening

Razorni potres Petrinja (opći pojam za potrese na Banovini) od 29.12.2020. magnitude Mw 6.4 oduzeo je 7 ljudskih života i prouzročio katastrofalne štete na području Banovine. U radu su prikazani i analizirani najvažniji parametri potresa te naglašena njihova važnost u razumijevanju nastalih oštećenja i rušenja građevina te oblikovanju optimalne konstrukcije za njihovu obnovu. Dan je doprinos u razumijevanju složenog mehanizma nastanka potresa preko analize naponsko-deformacijskog stanja u stijenskom masivu tijekom međudjelovanja tektonskih ploča. Uzroci rušenja i oštećenja zgrada objašnjeni su kombiniranim utjecajem svojstava njihove konstrukcije, tla i samog potresa. Predložena su rješenja optimalne konstrukcije novih zgrada, kao i rješenja konstrukcijskog ojačanja oštećenih zgrada.Strong Mw 6.4 Petrinja earthquake from 29.12.2020. took 7 lives and caused catastrophic damage in the Banovina area. The paper presents and analyses the most important earthquake parameters and highlights their importance in understanding the damage and demolition of buildings, as well as creating an optimal structure for their reconstruction. A contribution is made to the understanding of the complex mechanism of earthquake formation through the analysis of the stress-strain state in a rock mass during tectonic plate conflict. The causes of demolition and damage to buildings are explained by the combination of the properties of their structure, soil and the earthquake itself. Solutions for optimal structure of new buildings, as well as solutions for structural renovation of damaged buildings are proposed and described