2nd Croatian Conference on Earthquake Engineering ‒ 2CroCEE最新文献_第2页

SEISMIC RETROFITTING OF POST-WWII MID-RISE UNREINFORCED MASONRY RESIDENTIAL BUILDINGS IN THE BALKANS 二战后巴尔干半岛中层无加固砖石住宅的抗震改造

2nd Croatian Conference on Earthquake Engineering ‒ 2CroCEE Pub Date : 2023-03-24 DOI: 10.5592/co/2crocee.2023.90

S. Brzev, P. Blagojević, R. Cvetković

{"title":"SEISMIC RETROFITTING OF POST-WWII MID-RISE UNREINFORCED MASONRY RESIDENTIAL BUILDINGS IN THE BALKANS","authors":"S. Brzev, P. Blagojević, R. Cvetković","doi":"10.5592/co/2crocee.2023.90","DOIUrl":"https://doi.org/10.5592/co/2crocee.2023.90","url":null,"abstract":"There is a significant building stock of the existing low- and mid-rise unreinforced masonry (URM) buildings constructed after World War II in Serbia and neighbouring countries. Numerous buildings of this typology collapsed in the devastating 1963 Skopje, North Macedonia earthquake, causing fatalities, injuries, and property losses, and experienced damage in a few recent earthquakes in the region, including the 2010 Kraljevo, Serbia earthquake and the 2020 Petrinja, Croatia earthquake. These buildings are 3- to 5-storey high, have URM walls and rigid reinforced concrete (RC) or semi-prefabricated concrete and masonry floor slabs, usually with a RC ring beam at each floor level. The paper will provide an overview of seismic retrofitting approaches for these buildings, starting from provisions of design codes which were previously followed in Serbia and former Yugoslavia as well as Eurocode 8 (Part 3). Conventional seismic retrofitting technologies based on RC wall overlays which were applied in past earthquakes, including the 2010 Kraljevo earthquake, will be presented and their advantages and disadvantages will be discussed. Finally, a case study of a building in Kraljevo which was damaged in the 2010 earthquake and subsequently retrofitted, will be presented, including the results of seismic analysis and design solution. The paper should be of interest to engineers and academics interested in seismic retrofitting of masonry buildings.","PeriodicalId":427395,"journal":{"name":"2nd Croatian Conference on Earthquake Engineering ‒ 2CroCEE","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121581298","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}

引用次数: 0

MOST AFFECTED TYPOLOGIES FROM THE 26 NOVEMBER 2019 EARTHQUAKE 2019年11月26日地震中受影响最严重的类型

2nd Croatian Conference on Earthquake Engineering ‒ 2CroCEE Pub Date : 2023-03-24 DOI: 10.5592/co/2crocee.2023.106

M. Baballëku, Rikard Luka, Klajdi Shaholli

{"title":"MOST AFFECTED TYPOLOGIES FROM THE 26 NOVEMBER 2019 EARTHQUAKE","authors":"M. Baballëku, Rikard Luka, Klajdi Shaholli","doi":"10.5592/co/2crocee.2023.106","DOIUrl":"https://doi.org/10.5592/co/2crocee.2023.106","url":null,"abstract":"Assessing and finding the causes of damages in buildings belonging to construction typologies severely damaged as a result of the 26 November 2019 earthquake is of significant importance. Not only to better understand the causes of severe damage and the measures that should be taken specifically for these buildings, but also for planning the necessary interventions in these typified buildings typologies not only in the damaged areas but also in non-affected areas. This paper aims to carefully analyse some of the most severely damaged buildings by the earthquake, which have been associated with human casualties. Three construction typologies are considered in this paper, where two of them are design and build before the ‘90s as a typified buildings implemented in different cities, and the third one is a modification of typified RC building, constructed mainly after the ‘90s. One of the buildings build before the 90s is a masonry structure, while the others are reinforced concrete structure. Through damage and collapse mechanism assessment as well as using results of non-linear analysis, the paper attempts to highlight the primary causes of severe damage, compliance with building codes and the necessary measures that are recommended to reduce the vulnerability of these buildings","PeriodicalId":427395,"journal":{"name":"2nd Croatian Conference on Earthquake Engineering ‒ 2CroCEE","volume":"65 5","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133002397","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}

引用次数: 0

DISASTER RISK REDUCTION IN THE MUNICIPALITY OF LEZHË. SEISMIC RISK AS PART OF A MULTI-RISK ANALYSIS 在lezhË市减少灾害风险。地震风险作为多风险分析的一部分

2nd Croatian Conference on Earthquake Engineering ‒ 2CroCEE Pub Date : 2023-03-24 DOI: 10.5592/co/2crocee.2023.39

Merita Guri, Endri Duro

{"title":"DISASTER RISK REDUCTION IN THE MUNICIPALITY OF LEZHË. SEISMIC RISK AS PART OF A MULTI-RISK ANALYSIS","authors":"Merita Guri, Endri Duro","doi":"10.5592/co/2crocee.2023.39","DOIUrl":"https://doi.org/10.5592/co/2crocee.2023.39","url":null,"abstract":"Disaster Risk Reduction (DRR) and community resilience is considered as a global priority. For several decades the focus has been on changing the approach from emergency response towards prevention strategies. Within this approach local authorities have a fundamental role in reducing such disasters as they represent the link between the community and other stakeholders; from central authorities to engineers, planners and disaster specialists. As such the quality, efficiency and the way the risk information is provided to such authorities is of the utmost importance. Albania is located in one of the most active areas from the seismic point of view and therefore is an earthquake-prone country. The latest seismic event was the 6.4 Magnitude earthquake of November 2019 in Durrës which caused several fatalities and a considerable amount of economic damage, whose impact is still evident nowadays, three years after the event, with the recovery phase still ongoing. Such consequences clearly reflect the low levels of resilience and preparedness urban and non-urban systems in Albania unfortunately have. The aim of this paper, is the evaluation of seismic risk in semi-quantitative terms based on indices, within a wider multi-risk analysis including also flooding, fire, wind, snow etc. for one of the most strategic municipalities of Albania, Lezhë. The analysis is done by taking into consideration several aspects of vulnerability; physical, social, economic, environmental and cultural. The results of such analysis are aimed to be used for several decision-making processes by the local authorities as part of improving the strategies for Disaster Risk Reduction (DRR) and Disaster Risk Management (DRM).","PeriodicalId":427395,"journal":{"name":"2nd Croatian Conference on Earthquake Engineering ‒ 2CroCEE","volume":"214 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132187631","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}

引用次数: 1

LESSONS LEARNED FROM A PREDICTION AND POSTDICTION OF A SHAKE TABLE TEST ON AN UNREINFORCED MASONRY AGGREGATE 对未加筋砌体骨料振动台试验的预测与定位

2nd Croatian Conference on Earthquake Engineering ‒ 2CroCEE Pub Date : 2023-03-24 DOI: 10.5592/co/2crocee.2023.51

Igor M. Tomic, K. Beyer

{"title":"LESSONS LEARNED FROM A PREDICTION AND POSTDICTION OF A SHAKE TABLE TEST ON AN UNREINFORCED MASONRY AGGREGATE","authors":"Igor M. Tomic, K. Beyer","doi":"10.5592/co/2crocee.2023.51","DOIUrl":"https://doi.org/10.5592/co/2crocee.2023.51","url":null,"abstract":"Historical centers of Europe and Croatia are often formed by unreinforced masonry building aggregates that developed as the layout of the city or village was densified. In these aggregates, adjacent buildings can share structural walls with an older and a newer unit connected either by interlocking or just by a layer of mortar. Observations after for example the recent Central Italy and Croatia earthquakes showed that joints between the buildings were often damaged. This indicated a possible out-of-phase behaviour of units which can lead to the interaction which is demanding to capture with numerical models. The analysis of such building aggregates is difficult due to the lack of guidelines, as the advances were impeded by the scarce experimental data. The SERA project AIMS (Seismic Testing of Adjacent Interacting Masonry Structures) comprised a shake-table test of an aggregate of two buildings under two horizontal components of dynamic excitation, accompanied by the blind prediction competition. Each group was provided with a complete set of construction drawings, material properties, testing sequence and the list of measurements to be reported. After the results were reported, participants were able to compare the results, apply actual accelerations, and update their models within the postdiction phase. The prediction and postdiction of EPFL model were based on an equivalent frame model with a newly developed macroelement able to simulate both the in-plane and out-of-plane behaviour of unreinforced masonry piers, and a newly developed 3D material model allowing to simulate the interaction between the units. This paper deals with the prediction submitted by the EPFL team and discusses the results and possible pitfalls in modelling assumptions leading to unsatisfying prediction. Lessons learned are applied by updating the model for the postdiction analyses and discussing the updated results with the goal to improve the way we model unreinforced masonry aggregates using the equivalent frame approach.","PeriodicalId":427395,"journal":{"name":"2nd Croatian Conference on Earthquake Engineering ‒ 2CroCEE","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116790599","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}

引用次数: 0

RETROFITTING OF SACRAL BUILDINGS AFTER THE RECENT EARTHQUAKES IN CROATIA 克罗地亚最近发生地震后对圣坛建筑的改造

2nd Croatian Conference on Earthquake Engineering ‒ 2CroCEE Pub Date : 2023-03-24 DOI: 10.5592/co/2crocee.2023.97

David Anđić, M. Baniček, Tamara Horvat, B. Doračić, Juraj Pojatina, M. Stepinac, A. Baričević

引用次数: 0

STUDY OF SIMULTANEOUS INTER-STOREY DRIFT IP AND OOP LOADS ON RC FRAMES WITH AND WITHOUT INFILL WALLS AND OPENINGS BY A VARIATING ANGLE 不同角度下有无填充墙和开口的钢筋混凝土框架层间同时漂移荷载的研究

2nd Croatian Conference on Earthquake Engineering ‒ 2CroCEE Pub Date : 2023-03-24 DOI: 10.5592/co/2crocee.2023.83

Filip Anić, D. Penava, V. Sarhosis, L. Abrahamczyk

引用次数: 0

GEOPHYSICAL RECONSTRUCTION OF BEDROCK DEPTH AT THE LARGE SINKHOLE IN THE 2020 PETRINJA EARTHQUAKE 2020年petrinja地震大天坑基岩深度地球物理重建

2nd Croatian Conference on Earthquake Engineering ‒ 2CroCEE Pub Date : 2023-03-24 DOI: 10.5592/co/2crocee.2023.85

Eric Ntambakwa, I. Šalković, I. Tomac

{"title":"GEOPHYSICAL RECONSTRUCTION OF BEDROCK DEPTH AT THE LARGE SINKHOLE IN THE 2020 PETRINJA EARTHQUAKE","authors":"Eric Ntambakwa, I. Šalković, I. Tomac","doi":"10.5592/co/2crocee.2023.85","DOIUrl":"https://doi.org/10.5592/co/2crocee.2023.85","url":null,"abstract":"This paper shows the results of bedrock depth analysis around the largest cover-collapse sinkhole that occurred during the 2020-2021 Petrinja earthquake sequence. Horizontal to Vertical Spectral Ratio (HVSR) data was collected by the Geotechnical Extreme Events Reconnaissance (GEER) team after the Mw 6.4 December 2020 Petrinja earthquake in Croatia. In addition, the GEER team collected other data to assess the damage and geologic conditions, including two geotechnical boreholes with field and laboratory data and Multichannel Analysis of Surface Waves (MASW) profiles. Out of 61 HVSR readings performed during reconnaissance, 15 are around the largest sinkhole, S001, about 25 m wide and 12 m deep, with vertical walls and groundwater. The soil in the area consists of a clayey cover that is 4.0 m to 10.0 m thick, with sporadic gravel lenses. Clays are mostly over-consolidated, with varying degrees of saturation with intensely karstified carbonate rocks underneath. The HVSR data was analyzed using the HVSRweb platform and associated Python-based modules incorporating various statistical assessment models include single azimuth, multiple-azimuth, and geometric mean. The geometric mean results based on resampling frequencies between 3 Hz and 10 Hz indicate karst depths between 12.0 m and 18.0 m, which is generally consistent with the bedrock assumed from the sinkhole depth. Furthermore, an evaluation of the spatial variability of the resonance frequencies and the corresponding depth estimates assesses the presence and orientation of karstic features around S001. Based on the assessed data, HVSR measurements appear to be a helpful tool for evaluating variations in subsurface impedance contrasts and can be used to augment geotechnical data and other geophysical measurement techniques due to the relative ease of deployment and rapid data acquisition.","PeriodicalId":427395,"journal":{"name":"2nd Croatian Conference on Earthquake Engineering ‒ 2CroCEE","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117169473","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}

引用次数: 0

FRAGILITY AND VULNERABILITY ANALYSIS OF RC BUILDINGS WITH DIFFERENT SHAPES IN THE BASE 基础不同形状钢筋混凝土建筑易损性分析

2nd Croatian Conference on Earthquake Engineering ‒ 2CroCEE Pub Date : 2023-03-24 DOI: 10.5592/co/2crocee.2023.5

R. Folić, M. Čokić, B. Folić

引用次数: 0

COMPILATION OF AVAILABLE SEISMOTECTONIC DATA FOR NORTH MACEDONIA AS AN INPUT FOR PSHA 北马其顿现有地震构造资料汇编，作为psha的输入

2nd Croatian Conference on Earthquake Engineering ‒ 2CroCEE Pub Date : 2023-03-24 DOI: 10.5592/co/2crocee.2023.11

Zabedin Neziri, Radmila Salic Makreska

{"title":"COMPILATION OF AVAILABLE SEISMOTECTONIC DATA FOR NORTH MACEDONIA AS AN INPUT FOR PSHA","authors":"Zabedin Neziri, Radmila Salic Makreska","doi":"10.5592/co/2crocee.2023.11","DOIUrl":"https://doi.org/10.5592/co/2crocee.2023.11","url":null,"abstract":"N. Macedonia is a country characterized by relatively high seismic activity. As a consequence of its special tectonic regime, and quite frequent occurrence of damaging earthquakes, necessity for reliable seismic hazard and risk assessments are of outmost importance. Initial and one of the most important steps in PSHA is the seismic source characterization. Previously used seismic hazard models at the national level (Mihailov, 1978; Milutinovic et al., 1998; Dojcinovski, 2005; Stamatovska and Koytcheva, 2013; Salic, 2015; Milutinovic et al., 2016) consisted in areal type and/or gridded seismicity sources (Salic, 2015; Milutinovic et al., 2016), owing to the lack of seismogenic active fault parameters. All up to date available national (Basic Geological Map 1:100.000; Arsovski and Petkovski, 1975; Janchevski, 1987; Petkovski, 1992; Arsovski, 1997; Dumurdzanov et al., 2005; Drogreshka, 2018) and regional and European (EDSF13 and EFSM20) fault parametrization data were summarized and comparatively analysed. Three main declustered catalogues of earthquakes (National Seismological Observatory, BSHAP project, and ESHM20-Unified Earthquake Catalogue) for the territory of N. Macedonia and border region were also described and comparatively analysed. Histogram analysis related to different earthquake parameters were performed and compared together with the time completeness checks. As addition fault-plane solutions extracted from international or local seismic agencies concerning the studied region were analysed and systemised (Harvard CMT, INGV, EMEC, EPICA, BSHAP, Drogreshka, 2018). In this study, gaps and inconsistencies were drawn out from these data and alternative state-of-the-art methodologies were proposed to be used for seismogenic fault parametrization as a critical step towards reliable seismic hazard assessment.","PeriodicalId":427395,"journal":{"name":"2nd Croatian Conference on Earthquake Engineering ‒ 2CroCEE","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128574426","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}

引用次数: 0

BEHAVIOUR OF MASONRY INFILLS WITH DOOR OPENINGS UNDER SEQUENTIAL IN-PLANE AND OUT-OF-PLANE LOADING 面内、面外顺序荷载作用下有门洞砌体填料的性能

2nd Croatian Conference on Earthquake Engineering ‒ 2CroCEE Pub Date : 2023-03-24 DOI: 10.5592/co/2crocee.2023.47

Aleksa Milijaš, Bogdan Šakić, M. Marinković, C. Butenweg, M. Gams, Mathias Reichle

{"title":"BEHAVIOUR OF MASONRY INFILLS WITH DOOR OPENINGS UNDER SEQUENTIAL IN-PLANE AND OUT-OF-PLANE LOADING","authors":"Aleksa Milijaš, Bogdan Šakić, M. Marinković, C. Butenweg, M. Gams, Mathias Reichle","doi":"10.5592/co/2crocee.2023.47","DOIUrl":"https://doi.org/10.5592/co/2crocee.2023.47","url":null,"abstract":"Reinforced concrete (RC) frame structures with masonry infills are common in seismic-prone regions. Masonry infills are activated in in-plane and out-of-plane directions under seismic loading and often damaged during earthquakes. Several recent investigations have shown that the combined effects of in-plane and out-of-plane loads are particularly dangerous for masonry infills. However, most of these studies focused on solid infills, and there is little information about the influence of openings on the seismic performance of infills, even though openings may alter the seismic performance of infilled frames significantly. This paper presents results of two experimental tests carried out on masonry infills with full-height door openings. One was tested under pure out-of-plane load, and the second one with sequential in-plane and out-of-plane loads. Thereafter, results of these two tests are compared with experimental findings obtained from two experimental tests with similar loading protocol conducted on solid masonry infills. Results of the study demonstrate the deteriorating effect of door openings, especially under combined in-plane and out-of-plane loads. The results also highlight a need for practical solutions for damage prevention in both infills with and without openings.","PeriodicalId":427395,"journal":{"name":"2nd Croatian Conference on Earthquake Engineering ‒ 2CroCEE","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127803145","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}

引用次数: 0