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Data-based method for estimating loss of roof sheathings by considering wind load correlativity

A roof panel and wind load technology, applied in the direction of electrical digital data processing, special data processing applications, calculations, etc., can solve problems such as wind-induced loss of roof components

Inactive Publication Date: 2016-11-16
SOUTHWEST JIAOTONG UNIV
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Problems solved by technology

Although the correlation of wind pressure or wind force may have an important influence on the wind-induced loss of roof elements, it was not addressed in these studies

Method used

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  • Data-based method for estimating loss of roof sheathings by considering wind load correlativity
  • Data-based method for estimating loss of roof sheathings by considering wind load correlativity
  • Data-based method for estimating loss of roof sheathings by considering wind load correlativity

Examples

Experimental program
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Effect test

Embodiment

[0064] Example: Estimation of wind-induced damage to low-slung building panels

[0065] The wind pressure data come from the Atmospheric Boundary Layer Wind Tunnel at the University of Western Ontario (UWO). The prototype of the building is located in the suburban terrain, the rough ground length is 0.3m, the size is 62.5ft×40ft×12ft (19.1m×12.2m×3.7m, length×width×height), and the roof slope is 1:12. The sampling frequency and sampling time of the model are 500Hz and 100s respectively, and the scale ratio is 1:100.

[0066] The dimensions and roof slopes of the building model are not typical of residential buildings, and this model was selected due to the constraints of the National Institute of Standards and Technology (NIST) database. Therefore, the results of this example are not necessarily representative of typical residential buildings. The building model and wind pressure data were chosen only to illustrate the proposed method, and with a suitable database, the metho...

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Abstract

The invention discloses a data-based method for estimating loss of roof sheathings by considering wind load correlativity. The method is used for estimating the wind-induced loss of the roof sheathings adopting wood structures. In a calculation process, a probability density function of wind loads on the roof sheathings is estimated first and then extreme value distribution of the wind loads is obtained according to a conversion process method; extreme states of the roof sheathings are expressed by using relationships between extreme values of the wind loads on the roof sheathings and a resistance force, and then a destruction probability of the roof sheathings is calculated; and finally the loss of a whole roof is estimated. The method has the characteristics that a joint probability density function of the wind loads is obtained through Nataf change, so that the correlativity existent between the wind loads is considered and the influence of the wind load correlativity on wind-induced loss assessment of the roof sheathings is quantified. Meanwhile, the method can be expanded to the wind-induced loss estimation of other roof members such as asphalt shingles.

Description

technical field [0001] The invention belongs to the field of wind disaster assessment, and specifically relates to a method for estimating the loss of a roof panel of a wooden structure house under the condition of considering the correlation of wind load, and can also be extended to the loss estimation of other roof components such as asphalt tiles. Background technique [0002] For low-rise residential buildings, light timber structures are more common. Wind damage surveys after hurricanes and tornadoes have found that wood-frame structures are vulnerable to damage in high winds (e.g., van de Lindt J W, Graettinger A, Gupta R, et al. "Performance of wood-frame structures during Hurricane Katrina", Journal of Performance of Constructed Facilities , vol.21, no.2, pp.108-116, 2007). Roof panels are susceptible to wind-induced lift, especially at corners, edges and ridgelines (e.g., Uematsu Y, Isyumov N. "Windpressures acting on low-rise buildings", Journal of Wind Engineerin...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/13G06F30/367
Inventor 黄国庆罗颖冀骁文何华
Owner SOUTHWEST JIAOTONG UNIV
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