Numerical assessment of a slender structure damaged during October 30, 2020, İzmir earthquake in Turkey

Demir, Ali; Altıok, Taha Yasin

doi:10.1007/s10518-021-01197-8

Cited by 8 publications

(2 citation statements)

References 71 publications

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“…Several scientific studies were conducted on the 2020 Aegean Sea earthquake. While some studies focused on the geotechnical and seismic aspects of earthquake [7][8][9][10], others focused on building damage [11][12][13][14]. The total direct cost of the earthquake damage was estimated to be approximately USD 400 million [15].…”

Section: Introductionmentioning

confidence: 99%

A site survey of damaged RC buildings in İzmir after the Aegean sea earthquake on October 30, 2020

2023

JCE

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An earthquake with a magnitude of Mw = 6.6 and a depth of approximately 16.5 km occurred on 30 October 2020 off the cost of Samos, a Greek island 35 km southwest of Seferihisar, a town in İzmir. The earthquake caused several collapses and severe structural damage in approximately 6,000 buildings, specifically in the Bayraklı District in İzmir Bay. This paper presents the observations and findings of a technical team that visited the earthquake-affected areas immediately after an earthquake. Eleven partially or fully collapsed buildings and several severely damaged reinforced concrete buildings were investigated. Based on the site observations, we observed that almost all of the collapsed or severely damaged reinforced concrete buildings in the region were built between 1975 and 2000. Site observations also confirmed that the construction of these collapsed or damaged buildings did not conform to the requirements outlined in the Turkish Earthquake Codes used at the time. The failures and severe damage to buildings in earthquake-affected areas are primarily related to inadequate reinforcement configuration, poor material quality, the absence of geotechnical studies, and framing problems related to their lateral load-carrying systems. Therefore, it is recommended that all the buildings located in and around İzmir Bay, particularly those built between 1975 and 2000, be structurally evaluated to prevent any further loss of life and property during future earthquakes.

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Section: Introductionmentioning

confidence: 99%

A site survey of damaged RC buildings in İzmir after the Aegean sea earthquake on October 30, 2020

2023

JCE

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“…The results of the analyses show that the damage status of the structure can be determined more accurately as a result of calibrating the dynamic characteristics of the structure with OMA. Demir and Altıok [16] investigated the seismic behavior of the concrete Selimiye minaret, which was damaged in the 30 October 2020 Izmir (Seferihisar-Samos) Earthquake. The nonlinear finite element model was created using the Concrete Damage Plasticity failure model.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the Seismic Behavior of the Historic Clandras Bridge

ŞEKER

ŞAHİN

2022

Usak University Journal of Engineering Sciences

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Historical masonry arch bridges are one of the most important structures that convey the cultural heritage of past civilizations to the present. Historical masonry arch bridges were one of the most important elements of transportation and architecture in the past. These structures can be damaged by many natural disasters such as earthquakes, floods, etc. from the past to the present. It is necessary to carry out the necessary studies in order to protect these bridges as they were built and to transfer them safely to future generationsIt is clear that determining the earthquake behavior of these bridges, which are exposed to different geometrical properties, materials and loading conditions, will increase the effectiveness of the strengthening works to be done. In this study, the seismic behavior of the Uşak Clandras Bridge, which is a historical masonry arch bridge, was investigated by linear and non-linear time history analysis. Firstly, the 3D model of the masonry bridge was created with the Abaqüs program. To simulate the more real behavior of the structure, a detailed survey was carried out. For the characteristic features of the materials used in the bridge, studies in the literature were taken into consideration. Acceleration records of 1999 Kocaeli Earthquake were used in dynamic analyses.

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Geotechnical reconnaissance findings of the October 30 2020, Mw7.0 Samos Island (Aegean Sea) earthquake

Ziotopoulou

Çetin

Pelekis

et al. 2022

Bull Earthquake Eng

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On October 30, 2020 14:51 (UTC), a moment magnitude (Mw) of 7.0 (USGS, EMSC) earthquake occurred in the Aegean Sea north of the island of Samos, Greece. Turkish and Hellenic geotechnical reconnaissance teams were deployed immediately after the event and their findings are documented herein. The predominantly observed failure mechanism was that of earthquake-induced liquefaction and its associated impacts. Such failures are presented and discussed together with a preliminary assessment of the performance of building foundations, slopes and deep excavations, retaining structures and quay walls. On the Anatolian side (Turkey), and with the exception of the Izmir-Bayrakli region where significant site effects were observed, no major geotechnical effects were observed in the form of foundation failures, surface manifestation of liquefaction and lateral soil spreading, rock falls/landslides, failures of deep excavations, retaining structures, quay walls, and subway tunnels. In Samos (Greece), evidence of liquefaction, lateral spreading and damage to quay walls in ports were observed on the northern side of the island. Despite the proximity to the fault (about 10 km), the amplitude and the duration of shaking, the associated liquefaction phenomena were not pervasive. It is further unclear whether the damage to quay walls was due to liquefaction of the underlying soil, or merely due to the inertia of those structures, in conjunction with the presence of soft (yet not necessarily liquefied) foundation soil. A number of rockfalls/landslides were observed but the relevant phenomena were not particularly severe. Similar to the Anatolian side, no failures of engineered retaining structures and major infrastructure such as dams, bridges, viaducts, tunnels were observed in the island of Samos which can be mostly attributed to the lack of such infrastructure.

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Numerical assessment of a slender structure damaged during October 30, 2020, İzmir earthquake in Turkey

Cited by 8 publications

References 71 publications

A site survey of damaged RC buildings in İzmir after the Aegean sea earthquake on October 30, 2020

A site survey of damaged RC buildings in İzmir after the Aegean sea earthquake on October 30, 2020

Evaluation of the Seismic Behavior of the Historic Clandras Bridge

Geotechnical reconnaissance findings of the October 30 2020, Mw7.0 Samos Island (Aegean Sea) earthquake

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