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Analiza nośności zakotwień kominów stalowych wolno stojących

Kozłowski Aleksander, Kubiszyn Wiesław, Wojnar Andrzej

Inżynieria i Budownictwo

2023

R. 79, nr 9-10

482--488

W artykule opisano najczęściej stosowane w praktyce inżynierskiej procedury projektowania zakotwień powłok cylindrycznych stanowiących trzony kominów stalowych wolno stojących. Przedstawiono porównanie otrzymanych wyników obliczeń zakotwień z wykorzystaniem tych procedur dla dwóch kominów stalowych o wysokości 22,6 oraz 93,9 m. Przeprowadzono dyskusję otrzymanych wyników oraz podano zalecenia projektowe. Rekomendowano wytyczne zawarte w raporcie Międzynarodowego Komitetu ds. Budownictwa Przemysłowego (CICIND) jako praktyczną metodę projektowania zakotwień kominów stalowych.

The most often used in engineering practice procedures for designing anchorages of cylindrical shells constituting the shafts of free-standing steel chimneys has been presented in the paper. A comparison of calculation results obtained using these procedures, anchorages of two steel chimneys with a height of 22.6 and 93.9 m was presented. The results obtained were discussed and design guidelines were given. The guidelines contained in the report of International Committee on Industrial Construction (CICIND) were recommended as a practical method for designing steel chimney anchorages.

Proposed approach for positioning anchorage system in concrete

Habib M., Malkawi A., Awwad M.

Archives of Civil Engineering

2020

Vol. 66, nr 3

239--252

The problem of setting out in civil engineering applications has been addressed in the literature for a long time. However, technological development has provided researchers with an opportunity of having other procedures in line with modern techniques in surveying sciences. One of the most important procedures in erecting steel structures, bridges, and precast columns of a building is the accurate placement of the anchorage system in concrete. The traditional method for staking out anchor bolts relies on sight rails, string lines, and tape measure. The precision of this art depends not only on the accuracy of observed offset distances during layout operations but also on the centerline of the anchoring template itself. Nowadays, the process of designing structures is executed using software that can perform a digital plan in CAD environment, where the coordinates of each anchor bolt can be defined. This research presents an accurate approach of positioning anchor bolts based on the second problem in surveying and total station. Error analysis and field application are described to evaluate the performance of the proposed method. However, the results indicate that the developed technique increases productivity, reduces the cost, and improves the positional accuracy.