Farklı sismik bölgelerde yerel zemin koşullarının yapı hedef yerdeğiştirmelerine etkisi

Avcil, Fatih; Işık, Ercan; Büyüksaraç, Aydın

doi:10.17714/gumusfenbil.1107506

Cited by 3 publications

(3 citation statements)

References 16 publications

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“…It is clear that varying erosion depths have led to minimal alterations in both displacement and stress levels of the substation wall. However, it's essential to acknowledge that the simplified finite element model utilized in this study incompletely addresses the influence of flood erosion on the system (Assimaki et al, 2005;Fatahi et al, 2014;Avcil et al, 2022;Muhammad Tariq, 2023). Consequently, the effect of erosion depth changes on stress distribution and displacement response of the wall seems relatively minor.…”

Section: Erosion Depthmentioning

confidence: 99%

Analysis of the structural response and strengthening performance of prefabricated substation walls under flood loads

Yao,

Zhang,

Wang

et al. 2023

Front. Mater.

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Introduction: The study focuses on evaluating the reliability of prefabricated perimeter walls in substations during flood events. It employs a sophisticated numerical model based on actual engineering data to assess their load-bearing capabilities. The research investigates the impact of crucial flood parameters on the structural behavior of these walls, examines the force transmission mechanisms, and suggests “W-shaped” reinforcement techniques to mitigate stress-related issues.Methods: To meet our research goals, we developed an extensive numerical model for prefabricated perimeter walls, incorporating real-world engineering data. This model enabled us to analyze critical flood parameters, such as flood depth, flow velocity, and flood erosion. Furthermore, we investigated the force transmission mechanisms within the walls and introduced “W-shaped” reinforcement strategies to improve their load-bearing capacity.Results: Our results indicate that flood depth and flow velocity have a substantial impact on the performance of prefabricated perimeter walls, while flood erosion has a minor effect. Safety concerns become prominent when flood depth exceeds 1.0 m or flow velocity surpasses 3 m per second. Analysis of force transmission mechanisms reveals greater displacements at higher water levels. Critical areas, including wall panel-column and wall panel-foundation connections, experience heightened stress levels.Discussion: Our study highlights the significant role of flood depth and flow velocity in evaluating the load-bearing capacity of prefabricated perimeter walls in substation environments. To address potential structural weaknesses, we recommend implementing “W-shaped” wall reinforcement methods, which efficiently decrease both displacement and stress. These findings carry implications for substation design and flood resilience, underscoring the importance of comprehensive flood risk management strategies to protect internal facilities during floods.

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Section: Erosion Depthmentioning

confidence: 99%

Analysis of the structural response and strengthening performance of prefabricated substation walls under flood loads

Yao,

Zhang,

Wang

et al. 2023

Front. Mater.

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“…Bu çalışmalarda farklı yapı tipleri için deprem kuvveti hesap yöntemleri, taban kesme kuvvetleri, deplasmanlar, periyot, hedef deplasmanlar, katlar arası ötelenmeler, spektrum eğrileri ve kesit hasar değerleri incelenmiştir. [10][11][12][13][14][15][16][17] Karasin vd. [18] çalışmalarında coğrafi konuma özel tasarım spektrumlarının betonarme yapı performansına etkisini incelemişleridir.…”

Section: Introductionunclassified

Sismik dirençlilik ve spektral parametrelerin etkisi

KARASİN

2023

DÜMF MD

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Sismik etkilere karşı yapıların dayanım ve dayanıklılığını değerlendirmek ve depremlerin neden olabileceği hasarları en aza indirmek, deprem mühendisliğinin temel hedeflerindendir. Bu çerçevede deprem mühendisliğinde oldukça güncel olan sismik dirençlilik kavramı son yıllarda giderek önem kazanmaktadır. Bu çalışmada, herhangi bir afet sonrası yapıların eski haline dönebilme becerisi olarak tanımlanabilen Sismik dirençlilik konsepti, formülasyonları ile birlikte ele alınmıştır. Konsept olarak izah edilen sismik dirençlilik kavramının dirençlilik indeksi ile sayısallaştırılması bu indeksi oluşturan parametrelerden biri olan spektral ivme değeri değişken olarak seçilmiştir. Spektral ivme değişimine yaklaşımı farklı olan TBDY2018 ve DBYYHY2007 yönetmelikleri çerçevesinde 7 katlı bir betonarme yapı için Türkiye’nin 7 farklı bölgesinde 7 farklı şehir seçilmiş ve hesaplanan PGA değerleri esas alınarak kırılganlık eğrilerinden elde edilen dirençlilik indeksleri karşılaştırılmıştır. Bu karşılaştırma ile dirençlilik indeksi DBYYHY2007’e göre tüm şehirlerde sabit %99,7 iken değişken PGA değerleri ile TBDY2018’e göre %79,7-%99,6 aralığında hesaplanmıştır.

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“…Contaminants originating from various sources can easily infiltrate soil pores through intentional or unintentional leakage, leading to alterations not only in the visual appearance of soil particles but also in their geotechnical properties [10][11][12][13]. Under seismic loading, a tiny change in the geotechnical properties of the underlying soil can lead to intricate energy dissipation mechanisms, affecting the transmission of forces and deformations through the foundation and ultimately influencing the structural performance [14,15]. Furthermore, underground concrete foundations are highly susceptible to severe corrosion caused by the intrusion of contaminants, thereby resulting in a compromised bearing capacity and structural durability [16,17].…”

Section: Introductionmentioning

confidence: 99%

Impacts of Contaminants from Different Sources on Geotechnical Properties of Soils

Zhao,

Zhang,

Zhang

et al. 2023

Sustainability

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Within sites affected by industrial, domestic, and agricultural contaminants, the geotechnical characteristics of soils are susceptible to a certain degree of deterioration. The resultant corrosion of concrete exacerbates the vulnerability of underground structures, posing a potential hazard to the stability of superstructures. However, the current lack of comprehensive understanding regarding the precise influence of contaminants from different sources on the geotechnical properties of soils underscores the critical need for further research in this field. This review aims to elucidate the underlying mechanisms of various impacts, revealing that the permeability, shear strength, and compressibility of soils can either increase or decrease depending on the specific contaminants present. Notably, even though these impacts may not manifest prominently in the short term, their persistence can endure over an extended duration. The primary objective of this comprehensive review is to draw the attention of the scientific community and policy makers to this issue, emphasizing the need to mitigate potential hazards and safeguard a habitable environment for present and future generations.

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Farklı sismik bölgelerde yerel zemin koşullarının yapı hedef yerdeğiştirmelerine etkisi

Cited by 3 publications

References 16 publications

Analysis of the structural response and strengthening performance of prefabricated substation walls under flood loads

Analysis of the structural response and strengthening performance of prefabricated substation walls under flood loads

Sismik dirençlilik ve spektral parametrelerin etkisi

Impacts of Contaminants from Different Sources on Geotechnical Properties of Soils

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