Buried Pipe Behavior subjected to Seismic Effects: Christchurch Earthquake Case Study

Abstract

The seismic performance of buried pipelines is critical to their continued service after disasters. The 6.2 Mw Christchurch earthquake in February 2011 caused extensive damage to the drinking water distribution network. In this study, the effects of surface waves on the pipeline were investigated through a numerical case study on an asbestos cement (AC) pipeline. While buried pipelines can exhibit both relatively rigid and flexible behavior under surface wave propagation effects, this study focuses on the behavior of asbestos cement pipes, which exhibit rigid characteristics. Using Plaxis 2D based on the finite element method, a dynamic case analysis was performed on the AC type pipe damaged in the 2011 Christchurch earthquake and the results were compared with the results of the axial loading test conducted by Ghirmay (2016) on AC pipelines.

Keywords

• Earthquake
• Infrastructure systems
• Numerical modeling
• Christchurch

Sismik Etkiler Altında Gömülü Boru Davranışı: Christchurch Depremi Vaka Analizi

Abstract

Gömülü boru hatlarının sismik performansı, afetler sonrasında boruların servisini sürdürmesi açısından kritik bir öneme sahiptir. Şubat 2011’deki 6.2 Mw büyüklüğündeki Christchurch depremi içme suyu dağıtım şebekesinde büyük hasarlar oluşmasına sebep olmuştur. Bu çalışmada asbestli çimento boru (AC) hattı üzerinde gerçekleştirilen nümerik vaka analizi ile yüzey dalgalarının boru hattı üzerinde oluşturduğu etkiler incelenmiştir. Gömülü boru hatları, yüzey dalgası yayılma etkileri altında hem görece rijit hem de esnek davranışlar sergileyebilirken, bu çalışma rijit özellik gösteren asbestli çimento boruların davranışlarına odaklanmaktadır. Sonlu elemanlar yöntemine dayanan Plaxis 2D ile 2011 Christchurch depreminde hasar meydana gelen AC tipi boru üzerinde dinamik vaka analizi uygulanmış ve elde edilen sonuçlar, Ghirmay (2016) tarafından AC boru hatları üzerinde uygulanan yükleme deneyi sonuçları ile karşılaştırılmıştır.

Keywords

• Deprem
• Altyapı sistemleri
• Nümerik modelleme
• Christchurch

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