Drag Coefficients of Latticed Towers

Bayar, Demirtas C.

doi:10.1061/(asce)0733-9445(1986)112:2(417)

Cited by 49 publications

(3 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Zhou et al (2021) supposed that the wind load-distribution factors show strong regularity and are only related to the yaw angles and solidity ratios. Bayar et al (1986) explored the static wind effect of lattice tower by the force balance test of rigid model and obtained the drag coefficients of tower under different wind angles. Yang et al (2015) obtained the drag coefficients for 19 incidence angles by the wind tunnel test, and the maximum skewed wind loads corresponds to the wind angles close to 80° or 85°.…”

Section: Introductionmentioning

confidence: 99%

Experimental study on the aerodynamic characteristics of combined angle transmission tower subject to skew wind

Shen,

Que,

Wan

2024

Advances in Structural Engineering

View full text Add to dashboard Cite

The transmission towers served as crucial carriers in the process of power transmission. The combined angle transmission tower of dual-angle steel with cruciform section are relatively a novel type of angle tower, which is being more widely used in transmission lines. The studies on aerodynamic characteristics of combined angle tower in skewed wind are limited. In this paper, the wind tunnel tests are conducted to investigate the aerodynamic characteristics of the combined angle tower, and the high frequency force balance (HFFB) test is introduced to obtain the transverse and longitudinal forces on the tower using the direct force measurement (DFM) method. The drag coefficients and wind load-distribution factors of the combined angle tower are obtained from the wind tunnel tests, and the effects of interference and tower leg spacing on the wind loads of the tower legs are fully explored. It can be found that the aerodynamic coefficients and drag coefficients of the combined angle steel tower leg tend to decrease with the increase of interference members and it also decreases with the decrease of the tower leg spacing. The test wind load-distribution factors of the isolated leg are generally larger than those defined by seven typical codes (e.g., US, EU, Japanese, and Chinese codes) and significantly exceed the code-specified values under partial wind angles. The observations obtained from this study may provide helpful guidance on the wind-resistant design of this relatively novel type of combined angle tower.

show abstract

Section: Introductionmentioning

confidence: 99%

Experimental study on the aerodynamic characteristics of combined angle transmission tower subject to skew wind

Shen,

Que,

Wan

2024

Advances in Structural Engineering

View full text Add to dashboard Cite

show abstract

“…The resultant force acts in the direction of the wind for the latticed structures and does not consider the calculation of the orthogonal side force in most codes. Being developed and verified on the basis of numerous tests (Bayar, 1986; Georgiou and Vickery, 1980; Whitbread, 1980), this method is highly effective for regular lattices subjected to crossflow. For the latticed structures with irregular or complex geometry at varied wind incidence angles, this method is difficult to apply.…”

Section: Introductionmentioning

confidence: 99%

Experimental study on wind force coefficient of a truss arch tower with multiple skewbacks

et al. 2020

Advances in Structural Engineering

View full text Add to dashboard Cite

A truss arch tower is a large-span arch structure with multiple skewbacks. This tower is made of a large number of members with unique form, and contains more than five kinds of geometric features. The wind forces and the corresponding wind effects on the truss arch tower are notably complicated. In this study, wind tunnel tests were conducted to evaluate the wind forces on the steel latticed structure mentioned above using the high-frequency base balance technique. Four segmental models, including one arch foot of main truss, two arch feet of sub-truss, and one arch crown of main truss were tested in nominally smooth flow. The drag forces were measured and compared with several existing codes, including the British, American, and Chinese codes. The incidence angle effects and the interference effects on the drag coefficient were analyzed. The testing results showed that the direction of the wind forces has a marked effect on the whole truss tower. The solidity ratio and layout of the segmental models, including the cross-section and the centerline of the members, have critical effects on the drag forces.

show abstract

“…Based on the conclusion that the maximum effective wind on the tower structures occurs at a yaw angle of 451 developed by Bayar (1986), the skewed wind load factors are used in IEC standard (IEC 60826, 2003), ASCE standard (ASCE, 1991), European standard (EN 50341-1, 2001), British standard (BS-8100, 1986), Australia/New Zealand standard (AS/NZS 7000, 2010). While the wind load distribution factors in transversal and longitudinal direction along the transmission lines are adopted in Japanese standard (JEC-127-1979(JEC-127- , 1979 and Chinese standard (DL/T 5154-2012(DL/T 5154- , 2012.…”

Section: Introductionmentioning

confidence: 99%

Design wind loads for tubular-angle steel cross-arms of transmission towers under skewed wind loading

Yang

Niu

et al. 2015

Journal of Wind Engineering and Industrial Aerodynamics

View full text Add to dashboard Cite

Drag Coefficients of Latticed Towers

Cited by 49 publications

References 6 publications

Experimental study on the aerodynamic characteristics of combined angle transmission tower subject to skew wind

Experimental study on the aerodynamic characteristics of combined angle transmission tower subject to skew wind

Experimental study on wind force coefficient of a truss arch tower with multiple skewbacks

Design wind loads for tubular-angle steel cross-arms of transmission towers under skewed wind loading

Contact Info

Product

Resources

About