1. Prutkova Eugenia and Ryabchenkov Sergei Represent Report on the theme: JASS-2006

2. The wind loads in building Presented on JASS – 2006, Saint-Petersburg JASS-2006

3. Part I: Wind loads Content JASS-2006 by Prutkova Eugenia and Ryabchenkov Sergei Part II: Effects from wind loads Part III: Influence of wind loads on the exploitation of the building

4. Wind loads Part I JASS-2006 by Prutkova Eugenia and Ryabchenkov Sergei

5. The normative value of wind pressure Part I: Wind loads JASS-2006 by Prutkova Eugenia and Ryabchenkov Sergei

6. Part I: Wind loads Figure 1: Map of wind zoning JASS-2006

7. Part I: Wind loads Figure 2: Map of wind zoning (part) JASS-2006

8. Table 1: Calculated values of wind pressure on the height of buildings Height, metersCoefficient K for city’s ≤50.4 100.4 200.55 400.8 600.8 801.0 1001.15 Part I: Wind loads JASS-2006 by Prutkova Eugenia and Ryabchenkov Sergei

9. Figure 3: The scheme is used for collection loads of building Part I: Wind loads JASS-2006 by Prutkova Eugenia and Ryabchenkov Sergei the coefficient of dependability is:

10. The averaging interval10 min2 min1 min10 sec3 sec The correction coefficient on the average speed K 1 1,001,101,151,291,41 The correction coefficient on the average wind pressure К 2 1,001,211,321,661,99 - the normative value of wind pressure at the level of 10 metres over the surface of the ground, which corresponds 10-min. interval of averaging. (2) Part I: Wind loads Table 2: Dependence coefficients K 1 and K 2 from averaging interval JASS-2006 by Prutkova Eugenia and Ryabchenkov Sergei

11. К 1Н - value of cofficient К 1 on height Н under ground level (3)(3) Part I: Wind loads JASS-2006 by Prutkova Eugenia and Ryabchenkov Sergei

12. The determination of the resulted wind loads, acting on buildings and structures Part I: Wind loads JASS-2006 by Prutkova Eugenia and Ryabchenkov Sergei

13. Figure 4: The design scheme for tall buildings forces from action of the wind, according to the axes X,Y,Z moments, caused action of the wind, about this axes Wind Part I: Wind loads JASS-2006 by Prutkova Eugenia and Ryabchenkov Sergei (4)

14. Part I: Wind loads Figure 5: Level of pressure by streamlines of air flow JASS-2006 by Prutkova Eugenia and Ryabchenkov Sergei 1 relative dimensionless value of the pression relative unit of length wind relative unit of length

15. Some words about aerodynamic tube Part I: Wind loads Figure 6: The principal scheme of aerodynamic tube JASS-2006 by Prutkova Eugenia and Ryabchenkov Sergei wind micro-manometers

16. The determination of distributed wind loads, acting on surface of the building Part I: Wind loads JASS-2006 by Prutkova Eugenia and Ryabchenkov Sergei

17. С р1 - the absolute peak (maximum) meaning of the coefficient rarefaction on the surface of the building S – the square of the element Part I: Wind loads JASS-2006 by Prutkova Eugenia and Ryabchenkov Sergei (5) (6)

18. Effects from wind loads Part II JASS-2006 by Prutkova Eugenia and Ryabchenkov Sergei

19. Part II: Effects from wind loads JASS-2006 by Prutkova Eugenia and Ryabchenkov Sergei Resonance cases N - the frequency of break-down vortex, in Hertz ; D - the specific size of object ; V - the speed of incoming air flow ; Sh - is determinated of the shape by traversal sectional view of streamlined building, the angle of incoming air flow α (7)

20. Galloping Part II: Effects from wind loads JASS-2006 by Prutkova Eugenia and Ryabchenkov Sergei movement wind Figure 7: The principal scheme of ”Galloping” case

21. - selfrelative constructional damping action; - frequency of the self oscillations of the building; - the density of the air; V - the velocity of the incoming flow; В - the specific size of traversal sectional view of the building; - the speed movement of the element of the building in the direction, perpendicularly to the speed V; - coefficients of the elevating forces and resistance of the element of the building in axes, connected with the resulted speed vector of air flow (figure 8). Part II: Effects from wind loads JASS-2006 by Prutkova Eugenia and Ryabchenkov Sergei (8)

22. Figure 8: Cross-section of elastic-fixed body measure Glauert-Den Gartog The connection C L and C D with final speed vector of the air flow Part II: Effects from wind loads JASS-2006 by Prutkova Eugenia and Ryabchenkov Sergei (9) (10) vxvx v v yy x x

23. From this two formulas the extreme meaning of the speed V could be found, which starts the condition of galloping: Part II: Effects from wind loads measure of Glauert-Den Gartog characteristics of the building JASS-2006 by Prutkova Eugenia and Ryabchenkov Sergei (11) (12)

24. Part II: Effects from wind loads JASS-2006 by Prutkova Eugenia and Ryabchenkov Sergei Divergency Figure 9: Collapse of Tacoma bridge

25. -the normative value of the speed pressure at the height of building H, -the angle of coming to the building air flow, -the change of the angle due to the intertwisting of the building, -the stiffness coefficient of the building in the case of twisting Part II: Effects from wind loads JASS-2006 by Prutkova Eugenia and Ryabchenkov Sergei (13) (14)

26. according to this the change of the angle can be found: Part II: Effects from wind loads otherwise : JASS-2006 by Prutkova Eugenia and Ryabchenkov Sergei (15) (16)

27. Influence of wind loads on the exploitation of the building Part III JASS-2006 by Prutkova Eugenia and Ryabchenkov Sergei

28. JASS-2006 by Prutkova Eugenia and Ryabchenkov Sergei Figure 10: The scheme of tall building movement wind Part III: Influence of wind loads on the exploitation of the building

29. The level of discomfort. oscillations: acceleration (in percent from acceleration gravity force) insensible0,5 appreciable0,5 – 1,5 stimulated1,5 – 5 extremely stimulated5 – 15 intolerable>15 JASS-2006 by Prutkova Eugenia and Ryabchenkov Sergei Table 3: Dependence the level of discomfort from the value of acceleration Part III: Influence of wind loads on the exploitation of the building