|Table of Contents|

Study on Wind-induced Fatigue of Double-slope Roof Panels Considering Joint Distribution of Wind Speed and Direction(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2022年02期
Page:
1-10
Research Field:
防灾减灾工程
Publishing date:

Info

Title:
Study on Wind-induced Fatigue of Double-slope Roof Panels Considering Joint Distribution of Wind Speed and Direction
Author(s):
LI Shou-ying1;  CAO Jing-tao1;  LI Shou-ke2
(1. Key Laboratory for Wind and Bridge Engineering of Hunan Province, Hunan University, Changsha 410082, Hunan, China; 2. School of Civil Engineering, Hunan University of Science and Technology, Xiangtan 411201, Hunan, China)
Keywords:
wind-induced fatigue;  joint distribution of wind speed and direction;  probability statistics;  metal roof panel;  extreme value distribution;  angular variable
PACS:
TU312
DOI:
10.19815/j.jace.2021.02027
Abstract:
In order to study the fatigue damage distribution law of metal roofs used in long span and low buildings under wind loads, taking the double-slope roof building with a slope of 1/60 as the research object, based on the wind speed and direction data from 1975 to 2019, the fatigue damage cumulative value of the double-slope roof panel with a return period of 50 years was studied. The Gumbel distribution and the mixed Von Mises distribution were used to describe the daily extreme wind speed distribution and the wind direction distribution separately. The single-parameter Archimedean Copula function was used to describe the correlation between wind speed and wind direction, and the joint distribution of wind speed and direction was obtained. Based on the wind tunnel test results of the double-slope roof, the cumulative value of fatigue damage of the metal roof panel was studied considering the influence of continuously changing wind speed and discrete wind direction angle on the fatigue life. The results show that the fatigue damage of double-slope roof panels is closely related to factors such as the dominant wind direction and roof position. The cumulative fatigue damage in windward eaves, corners and other airflow separation locations at the dominant wind direction is much larger than that of other areas. The maximum cumulative value of 50 years wind-induced fatigue damage for the double-slope roof is 0.746 under, and wind load can cause fatigue failure of metal roof panels in windward eaves and corners. For metal roof panels, wind-induced fatigue damage is a huge hidden danger causing wind exposure accidents, which should be paid great attention to.

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Last Update: 2022-03-20