Stress resultants for wind girders in open-top cylindrical steel tanks

Date

2019-10-01

Author

Zeybek, Ozer
Topkaya, Cem
Rotter, J. Michael

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

116
views

0
downloads

Empty open-top cylindrical steel tanks are susceptible to buckling when subjected to external pressure due to wind or partial vacuum due to blocked vents. A "wind girder" is commonly used at the top of the tank wall to increase its strength against external pressure instability. The wind pressure varies around the circumference of the tank, but is relatively constant up its height. A series of cosine functions is typically used to describe the variation of wind pressure around the circumference. Expressions for stress resultants, that form the basis of widely used design specifications such as API 650 and SH 3046, are based on simple mechanical models that adopt simplified pressure distributions and ignore interactions between the wind girder and the tank shell. Furthermore, in classical treatments a tributary height is postulated for wind loading on the girder, and this height is taken as independent of the properties of the girder and the shell. The purpose of this study is to develop a rational procedure to determine the stress resultants in a wind girder. Pursuant to this goal, Vlasov's curved beam theory is used to derive the stress resultants and displacements for an isolated wind girder under a pressure distribution defined in terms of cosine functions. A parametric study employing finite element analysis is conducted to investigate the interaction of the wind girder with the tank shell. The stress resultants and the tributary height are found to be closely related to a shell-girder stiffness ratio that is devised in this study. This stiffness ratio was developed by considering the relative radial stiffness of the cylindrical shell and that of the wind girder. The changes in response quantities are expressed as functions of the shell-girder stiffness ratio. The developed expressions are presented in a form that is immediately useful for adoption into design standards.

Subject Keywords

Civil and Structural Engineering

URI

https://hdl.handle.net/11511/35643

Journal

ENGINEERING STRUCTURES

DOI

https://doi.org/10.1016/j.engstruct.2019.109347

Collections

Department of Civil Engineering, Article

Suggestions

OpenMETU
Core

Lateral buckling of overhanging crane trolley monorails Ozdemir, Kerem Murat; Topkaya, Cem (Elsevier BV, 2006-07-01) Lateral torsional buckling should be taken into account during the design of overhanging steel beams. One special type of overhanging beam is the crane trolley monorail. Lateral buckling of overhanging monorails under idealized loading and boundary conditions has been studied in the past using classical mathematical procedures. This paper aims to present a detailed investigation of overhanging monorails using finite element analysis. Effects of different loading and boundary conditions were studied in detai...
Seismic behavior and improvement of autoclaved aerated concrete infill walls Binici, Barış; Canbay, Erdem; Uzgan, Ugur; Eryurtlu, Zafer; Bulbul, Koray; Yakut, Ahmet (Elsevier BV, 2019-08-15) Performance of infill walls in reinforced concrete (RC) frames is generally questionable under the combined action of in-plane and out-of-plane seismic demands. Despite the vast number of tests investigating the behavior of brick masonry infill walls in RC frames, past research is limited for infill walls made of Autoclaved Aerated Concrete (AAC) blocks. In the first part of the study, six single-bay single-story half-scaled RC frames were tested under the action of in-plane cyclic displacement excursions a...
Isotropic-Kinematic Cyclic Hardening Characteristics of Plate Steels Shakeri, Ashkan (Springer Science and Business Media LLC, 2017-03-01) Cyclic hardening of metals is considered as one of the most important features that affects extremely the hysteresis behavior of steel structures. One approach to study this characteristic is dividing it into two components, including isotropic hardening and kinematic hardening, and defining any of these components for any type of metals by calibrated data obtained from experiments. However, the lack of these calibrated data on metals, restricts this approach. Therefore, in this paper the isotropic and kine...
Application of ring beam stiffness criterion for discretely supported shells under global shear and bending Topkaya, Cem (SAGE Publications, 2018-12-01) Silos in the form of a cylindrical metal shell are commonly elevated to provide access to the space beneath. In general, a few discrete column supports at evenly spaced intervals are commonly utilized. The presence of discrete supports results in circumferential non-uniformity in the axial compressive stress above the support. Depending on the size of the structure, several different support arrangements may be chosen. A stiff ring beam is utilized in larger silos to transfer and evenly distribute the discr...
Stiffness requirements for wind girders in open-top cylindrical steel tanks Zeybek, Özer; Topkaya, Cem (2022-07-01) © 2022 Elsevier LtdAboveground cylindrical storage tanks are very thin shell structures which are prone to buckling when subjected to wind pressure. Both external and internal pressures are developed due to wind action, and the magnitudes of the pressures generally vary around the circumference. A wind girder is generally used in open-top cylindrical tanks to increase their resistance against buckling. The wind girder must have adequate strength and stiffness in order to fulfill its function properly. Widel...

Citation Formats

O. Zeybek, C. Topkaya, and J. M. Rotter, “Stress resultants for wind girders in open-top cylindrical steel tanks,” ENGINEERING STRUCTURES, pp. 0–0, 2019, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/35643.