Component-based fragility analysis of transmission towers subjected to hurricane wind load

Abstract Wind action belongs to loads that are environmentally variable. Wind action is included in the basic combination of loads, whereas hurricane wind action is classified as a unique combination. Due to large gusts of wind, the roof coverings of large-scale buildings are exposed to detachment of their cover layer. The article presents the effects of over-normative wind, which occurred on January 19, 2018 and was named the cyclone Frederic/David. The purpose of the article is to show that in design of roof coverings made of large-format materials, such as membranes, it is crucial to accept wind load values properly in order to ensure a right spacing between fasteners. The presented results might be an important contribution to the debate on the necessity for increasing the fundamental value of the basic wind velocity in the perimeter and corner zones of large-format roofs.

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Wind-load fragility analysis of monopole towers by Layered Stochastic-Approximation-Monte-Carlo method

Engineering Structures ◽

10.1016/j.engstruct.2018.07.081 ◽

2018 ◽

Vol 174 ◽

pp. 462-477 ◽

Cited By ~ 4

Author(s):

Gian Felice Giaccu ◽

Luca Caracoglia

Keyword(s):

Monte Carlo ◽

Monte Carlo Method ◽

Stochastic Approximation ◽

Wind Load ◽

Fragility Analysis

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STUDY ON WIND LOAD EVALUATION METHOD CONSIDERING THE DYNAMIC EFFECT FOR TRANSMISSION TOWERS

Doboku Gakkai Ronbunshu ◽

10.2208/jscej.2003.738_139 ◽

2003 ◽

pp. 139-158 ◽

Cited By ~ 1

Author(s):

Tomomi ISHIKAWA

Keyword(s):

Evaluation Method ◽

Dynamic Effect ◽

Wind Load ◽

Transmission Towers ◽

Load Evaluation

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Three-Dimensional Numerical Simulation of Downburst Wind Occurrded in Wuhan

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.243-249.5037 ◽

2011 ◽

Vol 243-249 ◽

pp. 5037-5040 ◽

Cited By ~ 2

Author(s):

Yan Li ◽

Wei Lian Qu ◽

Bin Wang ◽

Yi Fei Wang ◽

Bai Feng Ji

Keyword(s):

Wind Field ◽

Cfd Simulation ◽

Initial Conditions ◽

Three Dimensional ◽

Wind Load ◽

Structure Design ◽

Wind Fields ◽

Transmission Towers ◽

Weather Phenomenon ◽

Radiosonde Station

Downburst is a strong downdraft generated below a cumulonimbus cloud, which hits the ground rapidly and causes significant low-level wind shear. It is a strong destructive regional weather phenomenon, which is the main reason for the transmission towers. In recent years, some scholars have researched the finer wind field characteristics and wind load of downburst by using the method of CFD. But the initial conditions are all assumed due to the small synoptic scale, the short lifecycle and the big measurement difficulty of downburst. So downburst wind load can not be taken into account in structural design. Based on the 3-D convective storm numerical model, by inputting temperature, humidity and wind fields detected in Wuhan radiosonde station at 8pm on July,27th,2007, simulation has been accomplished to understand the characteristics of the wind field in the place where the downburst incurred actually. The result provides model data and parameters for CFD simulation, which has directive significance to concern the high intensity downburst wind load in structure design.

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