The Investigations of Nonlinear Analysis Principles of Codes in Base-Isolated Tank Design

Samet Kılıç

Makale detayları

The Investigations of Nonlinear Analysis Principles of Codes in Base-Isolated Tank Design

Yazarlar:

Samet Kılıç

Yayıncı:

Giresun University

Ana Başlıklar:

Malzeme Mühendisliği (Diğer)

Dergi:

Karadeniz Fen Bilimleri Dergisi Vol.14 Issue 2, pp.551-575

Belge Tipi:

Makale

Yayın Tarihi:

6/2024

Belge Dili:

Türkçe

Document ID (Org No.):

2001319681

pISSN:

2564-7377

Anahtar kelimeler:

Özet:

 Seismic isolation is used today to prevent damage to industrial tanks during earthquakes. Seismic isolation requires nonlinear time-history analysis. Nonlinear analysis principles for seismically isolated tanks are detailed in Eurocode8, ASCE7-16 and other codes and the rules defined for structures similar to buildings are also recommended for tanks. In the Turkish Pipeline Systems and Liquid Storage Tanks Earthquake Regulation, the design of seismically isolated tanks is directed to the Türkiye Building Seismic Code-2018. Examples of common tank design codes are Eurocode8 Part4, API 650 and the New Zealand Regulation. In these regulations, seismic isolation principles are mentioned, but not all design principles are defined, and references are made to the earthquake regulations of the relevant countries. When tank and earthquake regulations are compared, it is seen that nonlinear analysis principles are incompatible for seismically isolated tanks. In this study, seismic isolation principles of current regulations are examined. An atmospheric pressure, 10m high, steel tank containing water is dimensioned, an appropriate isolation system was designed, and isolation systems are evaluated using ANSYS for non-linear analysis. Base shear forces, isolation unit tensile forces, hydrodynamic tank wall stresses and sloshing wave height results are evaluated by comparing earthquake scaling methods. Consequently, it is concluded that earthquake scaling methods change the results obtained, that the displaced projection area is decisive in the tensile and compression force capacities of the isolation unit, and that the isolation system is effective on the impulsive mode in tanks and not on the convective mode.

 Seismic isolation is used today to prevent damage to industrial tanks during earthquakes. Seismic isolation requires nonlinear time-history analysis. Nonlinear analysis principles for seismically isolated tanks are detailed in Eurocode8, ASCE7-16 and other codes and the rules defined for structures similar to buildings are also recommended for tanks. In the Turkish Pipeline Systems and Liquid Storage Tanks Earthquake Regulation, the design of seismically isolated tanks is directed to the Türkiye Building Seismic Code-2018. Examples of common tank design codes are Eurocode8 Part4, API 650 and the New Zealand Regulation. In these regulations, seismic isolation principles are mentioned, but not all design principles are defined, and references are made to the earthquake regulations of the relevant countries. When tank and earthquake regulations are compared, it is seen that nonlinear analysis principles are incompatible for seismically isolated tanks. In this study, seismic isolation principles of current regulations are examined. An atmospheric pressure, 10m high, steel tank containing water is dimensioned, an appropriate isolation system was designed, and isolation systems are evaluated using ANSYS for non-linear analysis. Base shear forces, isolation unit tensile forces, hydrodynamic tank wall stresses and sloshing wave height results are evaluated by comparing earthquake scaling methods. Consequently, it is concluded that earthquake scaling methods change the results obtained, that the displaced projection area is decisive in the tensile and compression force capacities of the isolation unit, and that the isolation system is effective on the impulsive mode in tanks and not on the convective mode.

 Seismic isolation is used today to prevent damage to industrial tanks during earthquakes. Seismic isolation requires nonlinear time-history analysis. Nonlinear analysis principles for seismically isolated tanks are detailed in Eurocode8, ASCE7-16 and other codes and the rules defined for structures similar to buildings are also recommended for tanks. In the Turkish Pipeline Systems and Liquid Storage Tanks Earthquake Regulation, the design of seismically isolated tanks is directed to the Türkiye Building Seismic Code-2018. Examples of common tank design codes are Eurocode8 Part4, API 650 and the New Zealand Regulation. In these regulations, seismic isolation principles are mentioned, but not all design principles are defined, and references are made to the earthquake regulations of the relevant countries. When tank and earthquake regulations are compared, it is seen that nonlinear analysis principles are incompatible for seismically isolated tanks. In this study, seismic isolation principles of current regulations are examined. An atmospheric pressure, 10m high, steel tank containing water is dimensioned, an appropriate isolation system was designed, and isolation systems are evaluated using ANSYS for non-linear analysis. Base shear forces, isolation unit tensile forces, hydrodynamic tank wall stresses and sloshing wave height results are evaluated by comparing earthquake scaling methods. Consequently, it is concluded that earthquake scaling methods change the results obtained, that the displaced projection area is decisive in the tensile and compression force capacities of the isolation unit, and that the isolation system is effective on the impulsive mode in tanks and not on the convective mode.

 Endüstriyel tanklarda, depremlerde hasarları engellemek için, günümüzde sismik yalıtım kullanılmaktadır. Sismik yalıtım, zaman tanım alanında doğrusal olmayan analizler gerektirir. Yalıtımlı tanklar için doğrusal olmayan analiz prensipleri Eurocode8, ASCE7-16 ve diğer kodlarda detaylı olarak verilmiştir ve binalara benzer yapılar için tanımlanan kurallar tanklar için önerilmiştir. Türkiye Boru Hattı Sistemleri ve Sıvı Depolama Tankları Deprem Yönetmeliğinde, yalıtımlı tankların tasarımında Türkiye Bina Deprem Yönetmeliğine yönlendirme yapılmaktadır. Yaygın tank tasarım kodlarına Eurocode8 Part4, API 650 ve New Zeland Yönetmeliği örnektir. Bu yönetmeliklerde sismik yalıtım esaslarından bahsedilmiş fakat tüm tasarım prensipleri tanımlanmamış, ilgili ülkelerin deprem yönetmeliklerine atıfta bulunulmuştur. Tank ve deprem yönetmelikleri kıyaslandığında, doğrusal olmayan analiz prensiplerinin sismik yalıtımlı tanklar için uyumsuzluğu görülmüştür. Bu çalışmada, mevcut yönetmeliklerin sismik yalıtım prensipleri incelenmiştir. Bir adet atmosferik basınçlı, 10m yüksekliğinde, içerisinde su bulunduran çelik tank boyutlandırılıp, uygun yalıtım sistemi tasarımı yapılmış ve doğrusal olmayan analizler için ANSYS kullanılarak, deprem yalıtım sistemleri değerlendirilmiştir. Taban kesme kuvvetleri, yalıtım birimi çekme kuvvetleri, hidrodinamik tank duvarı gerilmeleri ve çalkalanma dalgası yüksekliği sonuçları deprem ölçekleme metotları kıyaslanarak değerlendirilmiştir. Bunlar sonucunda, deprem ölçekleme yöntemlerinin elde edilen sonuçları değiştirdiği, yalıtım biriminin çekme ve basınç kuvveti kapasitelerinde yer değiştirmiş izdüşüm alanının belirleyici olduğu, yalıtım sisteminin tanklarda darbesel mod üzerinde etkili olduğu, devinimsel modda olmadığı sonucuna varılmıştır.

Makale detayları

The Investigations of Nonlinear Analysis Principles of Codes in Base-Isolated Tank Design

Yazarlar:

Samet Kılıç

Yayıncı:

Giresun University

Ana Başlıklar:

Malzeme Mühendisliği (Diğer)

Dergi:

Karadeniz Fen Bilimleri Dergisi Vol.14 Issue 2, pp.551-575

Belge Tipi:

Makale

Yayın Tarihi:

6/2024

Belge Dili:

Türkçe

Document ID (Org No.):

2001319681

pISSN:

2564-7377

Tank seismic design

Base isolation

Ground motion scaling

Fluid structure interaction

Steel tanks

Cylindrical shellsTank sismik tasarımı

Taban yalıtımı

Deprem kaydı ölçekleme

Yapı sıvı etkileşimi

Çelik tanklar

Silindirik kabuklar

Sayı

Makale detayları

Yazarlar: Samet Kılıç

Yayıncı: Giresun University

Ana Başlıklar: Malzeme Mühendisliği (Diğer)

Dergi: Karadeniz Fen Bilimleri Dergisi Vol.14 Issue 2, pp.551-575

Belge Tipi: Makale

Yayın Tarihi: 6/2024

Belge Dili: Türkçe

Document ID (Org No.): 2001319681

pISSN: 2564-7377

Sayı

Yazarlar:

Samet Kılıç

Yayıncı:

Giresun University

Ana Başlıklar:

Malzeme Mühendisliği (Diğer)

Dergi:

Karadeniz Fen Bilimleri Dergisi Vol.14 Issue 2, pp.551-575

Belge Tipi:

Makale

Yayın Tarihi:

6/2024

Belge Dili:

Türkçe

Document ID (Org No.):

2001319681

pISSN:

2564-7377