Behavior of Reinforced Concrete Cooling Tower Type Structures Under Wind and Thermal Loads

Abstract

Cooling towers are structures mainly used in industrial zones such as natural gas facilities, nuclear energy plants, power plants and petrol refineries for supplying cooling water and designed accordingly. The need for industrial facilities in our country has been increasing every passing day. Cooling towers are quite tall and have a big diameter which is why they are exposed to wind loads due to their wide surface area. Considering different seasonal conditions and the hot water circulation, it can be said that thermal effects also have an impact for the cooling towers. In this study that is within this context, as model parameters; 120 m, 160 m, 200 m of heights for concrete shell, 18 m steel columns, 37.5 m s-1 wind speed and temperatures of +20 °C, +40 °C, -40 °C, 30-60 °C are chosen for analyses. Analysis results are evaluated for the chosen parameters. As a result, it was observed that the temperature loads combined with the wind load had a significant effect on the tower shell.

Keywords

• Cooling Tower
• Wind Loading
• Thermal Loading
• Axisymmetric Structures

Betonarme Soğutma Kulesi Tipi Yapıların Rüzgâr ve Sıcaklık Yükleri Etkisi Altındaki Davranışı

Abstract

Soğutma kuleleri, başta doğalgaz işletme tesisleri, nükleer enerji ve elektrik santralleri, petrol rafinerileri olmak üzere endüstriyel tesislere soğutma suyu sağlamak amacıyla tasarlanan yapılardır. Ülkemizin ekonomik ve siyasi durumu dikkate alındığında endüstriyel tesislere duyulan ihtiyaç her geçen gün artmaktadır. Çok yüksek ve büyük çapa sahip yapılar oldukları için rüzgâr kuvvetine maruz kalan büyük bir yüzey alanına sahiptir. Farklı iklim koşulları ve soğutma kulesinin içinde dolaşan sıcak su dikkate alındığında termal etki de soğutma kulelerinde etkin bir rol oynar. Bu bağlamda yapılan bu çalışmada soğutma kulesi model parametresi olarak 120, 160, 200 m yüksekliğe sahip beton kabuğa 18 m olarak seçilen çelik kolonlar 37.5 m s-1 rüzgâr hızıyla birlikte tüm kabuğa +20 °C, +40 °C, -40 °C ve hava akışına bağlı olarak 30-60 °C arasında değişen sıcaklıklar kullanılarak analiz edilmiştir. Sonuç olarak rüzgâr yükü ile kombine edilen sıcaklık yüklerinin kule kabuğunda kayda değer bir etkiye sahip olduğu görülmüştür.

Keywords

• Soğutma kulesi
• Rüzgâr Yükü
• Sıcaklık Yükü
• Eksenel Simetrik Yapılar

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