scholarly journals Wind Loads for Designing Cylindrical Storage Tanks Part 2 Wind Force Model with Consideration of the Buckling Behavior Under Wind Loading

2012 ◽  
Vol 37 (3) ◽  
pp. 79-92 ◽  
Author(s):  
Jumpei YASUNAGA ◽  
Choongmo KOO ◽  
Yasushi UEMATSU
Keyword(s):  
Wind Loads ◽  
Wind Loading ◽  
Force Model ◽  
Storage Tanks ◽  
Wind Force ◽  
Buckling Behavior

Consideration of Wind Loads in Fitness for Service Assessment of Storage Tanks

2020 ◽  
Author(s):  
Gys van Zyl ◽  
Stewart Long
Keyword(s):  
Wind Pressure ◽  
Wind Loads ◽  
Wind Loading ◽  
Storage Tanks ◽  
Actual Distribution ◽  
Wind Actions ◽  
Level 3 ◽  
Tank Design ◽  
Cylindrical Tanks ◽  
Direct Guidance

Abstract Wind actions are important to consider when performing fitness for service assessment on storage tanks with damage. Tank design codes typically have rules where a design wind velocity is used to determine required dimensions and spacing of wind girders, and a uniform wind pressure is used to evaluate tank anchorage for uplift and overturning due to wind actions. These rules are of little use in a fitness for service assessment of localized damage, as the actual distribution of wind pressure on the wall and roof of a cylindrical tank is far from constant, and a better evaluation of the wind pressure distribution is desired when performing a level 3 fitness for service assessment. API 579/ASME FFS-1 provides no direct guidance relating to the application of wind loading but refers to the American Society of Civil Engineers Standard ASCE/SEI 7. Other international codes relating to wind loads, such as Eurocode EN-1991-1-4 and Australia/New Zealand Standard AS/NZS 1170.2 also contain guidance for the evaluation of wind actions on cylindrical tanks. This paper will present a review of these international codes by comparing their guidance for wind actions on cylindrical tanks, with specific emphasis on how this may affect a level 3 fitness for service assessment of a damaged storage tank.

WIND LOADS AND WIND-INDUCED BUCKLING OF OPEN-TOPPED OIL-STORAGE TANKS IN VARIOUS ARRANGEMENTS

2014 ◽  
Vol 1 (1) ◽  
Author(s):  
Yasushi Uematsu ◽  
Jumpei Yasunaga ◽  
Choongmo Koo
Keyword(s):  
Wind Tunnel ◽  
Wind Loading ◽  
Storage Tanks ◽  
Wind Force ◽  
Force Coefficient ◽  
Oil Storage ◽  
Internal Surfaces ◽  
Circumferential Distribution ◽  
Wind Pressures ◽  
Gap Spacing

Wind force coefficients for designing open-topped oil-storage tanks in various arrangements have been investigated under experiments involving a wind tunnel and a buckling analysis of the tanks. In the wind tunnel experiment, the wind pressures were measured simultaneously at many points both on the external and internal surfaces of a rigid model for various arrangements of two to four tanks. The effects of arrangement and gap spacing of tanks on the pressure distribution are investigated. The buckling of tanks under static wind loading is analyzed by using a non-linear finite element method. A discussion of the effect of wind force distribution on the buckling behavior follows. The authors provided a model of circumferential distribution of wind force coefficient on isolated open-topped tanks in their previous paper. This paper proposes a model of wind-force coefficient for plural tanks in various configurations by modifying the model for isolated tanks.

Effect of Welding Residual Stress on the Buckling Behavior of Storage Tanks Subjected to Harmonic Settlement

2016 ◽  
Vol 139 (1) ◽  
Author(s):  
Jian-Guo Gong ◽  
Lei Yu ◽  
Feng Wang ◽  
Fu-Zhen Xuan
Keyword(s):  
Residual Stress ◽  
Design Method ◽  
Welding Residual Stress ◽  
Welding Parameters ◽  
Strengthening Effect ◽  
Storage Tanks ◽  
Buckling Strength ◽  
Welding Joint ◽  
Buckling Behavior ◽  
Significant Difference

The effect of welding residual stress on the buckling behavior of storage tanks subjected to the harmonic settlement was simulated using the shell-to-solid coupling method. In the numerical model of tanks coupled with the welding residual stress, the welding joint and its adjacent zone were modeled using the solid submodel and the zone far away from the welding joint was built by the shell submodel. Effects of welding parameters (e.g., welding velocities and welding passes) on the buckling behavior of tanks were analyzed systematically. Results indicate that the buckling strength of tanks is enhanced due to the welding residual stress. Comparatively, a slow welding velocity presents a more remarkable strengthening effect than the fast welding velocity due to a larger axial residual stress produced at the welding joint. Nevertheless, no significant difference between the double-side welding and the one-side welding for buckling strength enhancement is observed for the cases studied. This indicates that the current design method causes a conservative design without considering the welding residual stress.

scholarly journals Wind loads on free-standing canopy roofsPart 3 Validity and application of the proposed wind force coefficients

2006 ◽  
Vol 31 (4) ◽  
pp. 115-122
Author(s):  
Yasushi UEMATSU ◽  
Eri IIZUMI ◽  
Theodore STATHOPOULOS
Keyword(s):  
Wind Loads ◽  
Wind Force ◽  
Free Standing ◽  
Force Coefficients

Spectral Characteristics and Correlation of Dynamic Wind Loads of a Typical Super-Tall Building

2013 ◽  
Vol 351-352 ◽  
pp. 347-350
Author(s):  
Lun Hai Zhi
Keyword(s):  
Wind Tunnel ◽  
Empirical Formula ◽  
Spectral Characteristics ◽  
Tall Buildings ◽  
Tall Building ◽  
Wind Loads ◽  
Wind Loading ◽  
Wind Tunnel Tests ◽  
Cross Correlations ◽  
Overturning Moment

This paper present some selected results of wind tunnel tests carried out on a typical super-tall building The variations of wind loads in the three orthogonal directions with wind attack direction were evaluated. The cross-correlations among various wind loading components were presented and discussed in detail. Furthermore, the across-wind spectral characteristics were studied and an empirical formula for estimation of the across-wind overturning moment spectrum for the super-tall building is presented. The output of this study is expected to be of considerable interest and practical use to professionals and researchers involved in the design of super-tall buildings.

scholarly journals Wind Loads for Designing Cylindrical Storage Tanks Part 1 Characteristics of Wind Pressure and Force Distributions

2012 ◽  
Vol 37 (2) ◽  
pp. 43-53 ◽  
Author(s):  
Jumpei YASUNAGA ◽  
Choongmo KOO ◽  
Yasushi UEMATSU
Keyword(s):  
Wind Pressure ◽  
Wind Loads ◽  
Storage Tanks

Comparison of the Canadian standard and other standards for wind loading on self-supporting telecommunication towers

2020 ◽  
Author(s):  
Patricia Martín ◽  
Ashraf A. El Damatty
Keyword(s):  
Civil Engineering ◽  
International Standards ◽  
Wind Loads ◽  
Wind Loading ◽  
Effect Factor ◽  
Engineering Community ◽  
Axial Forces ◽  
Australian Standard ◽  
Telecommunication Towers ◽  
Wind Profiles

Designing telecommunication towers to withstand wind loads requires specific considerations, which has led the international civil engineering community to develop specific standards for these structures. The recent internationalization of the construction business has made it imperative for engineers to acquire knowledge and interpretation of codes from different countries. In light of the 2018 update of Canadian Standard CSA-S37-18 (CSA), evaluating its differences against other international standards for telecommunication towers has become important. This paper presents a comparison of the wind loading specifications for self-supporting telecommunication towers according to CSA; Australian Standard; Eurocode EN-1993-1; and US Standard TIA-222-G. The different standards have also been evaluated with respect to the values of the axial forces and the elements ratio for two self-supporting telecommunication towers. The parameters related to the wind profiles and the gust effect factor presented the highest difference between the standards.

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