Wind Climate Exam Flashcards
What are the reasons for the definition of a “basic velocity vb” according to the definition given in Eurocode?
- vb can be defined in a large scale, independent on local development and vegetation
- Using vb ensures a unique statistical base
- vb can be expresses independent on the roughness category
What is expressed with the integral length scale of turbulence Lux?
The correlation of flow velocities in space
Which wind parameters are influence by the terrain roughness surrounding a specific locations?
a) Turbulence intensity
b) Average velocity
c) Return period
d) Intergral length scale
a)
b)
d)
Why is the underlying averaging time for wind velocity an important information?
a) The maximum values depent on the averaging time
b) With increasing time, the wind velocity increases, too
c) For the structural calculation normally values with an averging time of 2-3s are needed
d) Dependent on the building size, an appropriate averaging time needs to be selected
a)
c)
What ist true for the integral length scale Lux?
a) Describes the average diameter of a gust vortex
b) Describes a flow relation between time and space
c) Is a measure of flow the correlation in space
a)
b)
c)
