app9_wind_reliab

app9_wind_reliab - Application Example 9 (Independent...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Application Example 9 (Independent Random Variables) RELIABILITY OF A BUILDING UNDER EXTREME WIND LOADS - CHOOSING THE DESIGN WIND SPEED Consider the problem of designing a tall building for a certain level of reliability against wind loads. The building has a planned life of N years. Let V i be the maximum wind speed in year i at the site of the building (for simplicity we ignore wind direction). Although the values of wind speed at closely spaced times are probabilistically dependent random variables, yearly maximum values may be considered independent. Moreover, the distribution of V i is the same for all years i. Therefore, the variables V 1 , . .., V N may be considered independent and identically distributed (iid), with some common cumulative distribution F V (v). Empirical data indicate that, at most locations, the distribution F V (v) is either Extreme Type I or Extreme Type II. The latter has the form ( 1 ) F V (v) = e (v/u) k where u and k are positive parameters. In Boston, plausible values of u and k are u = 49.4 mph and k = 6.5. Therefore, for Boston F V = e (v/49.4) 6.5 ( 2 ) where V is in mph. Consider now the problem of choosing the design wind speed v* for a building in
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 02/27/2008 for the course PTE 461 taught by Professor Donhill during the Fall '07 term at USC.

Page1 / 5

app9_wind_reliab - Application Example 9 (Independent...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online