Transcript Chapter 1
Structural Analysis, Seventh Edition Russell C. Hibbeler Structural Analysis, Seventh Edition Russell C. Hibbeler Copyright © 2009 Pearson Prentice Hall Inc. Structural Analysis, Seventh Edition Russell C. Hibbeler Structural Analysis, Seventh Edition Russell C. Hibbeler Structural Analysis, Seventh Edition Russell C. Hibbeler Structural Analysis, Seventh Edition Russell C. Hibbeler Structural Analysis, Seventh Edition Russell C. Hibbeler Structural Analysis, Seventh Edition Russell C. Hibbeler Structural Analysis, Seventh Edition Russell C. Hibbeler Structural Analysis, Seventh Edition Russell C. Hibbeler Enclosed building, Agricultural. Outside Chicago Flat terrain. Find design wind pressure Structural Analysis, Seventh Edition Russell C. Hibbeler Velocity Pressure • qz = 0.00256 Kz Kzt Kd V2 I V= I= Kzt = Kd = Kz = Structural Analysis, Seventh Edition Russell C. Hibbeler Structural Analysis, Seventh Edition Russell C. Hibbeler Z (ft) Kz 0-15 0.85 20 0.90 25 0.94 30 0.98 40 1.04 Linear interpolation • We need to use linear interpolation to find Kz • Our height is the midpoint of the roof 31.6 feet Structural Analysis, Seventh Edition Russell C. Hibbeler We know 30’ and 40’, but we need 31.6’. If it is on a line, we can create an equation and plug in our x value. 1.05 1.04 1.03 1.02 1.01 1 y = mx + b 0.99 0.98 0.97 30 32 34 36 38 40 m = (y2 – y1)/(x2-x1) The same slope must apply for our new point, (x*,y*) m = (y2 – y*)/(x2-x*) m = (1.04 – 0.98)/(40-30) = (1.04 – y*)/(40-31.6) y* = Kz = 0.99 Structural Analysis, Seventh Edition Russell C. Hibbeler Copyright © 2009 Pearson Prentice Hall Inc. Structural Analysis, Seventh Edition Russell C. Hibbeler Copyright © 2009 Pearson Prentice Hall Inc. Structural Analysis, Seventh Edition Russell C. Hibbeler Copyright © 2009 Pearson Prentice Hall Inc. Structural Analysis, Seventh Edition Russell C. Hibbeler Structural Analysis, Seventh Edition Russell C. Hibbeler Structural Analysis, Seventh Edition Russell C. Hibbeler Structural Analysis, Seventh Edition Russell C. Hibbeler Structural Analysis, Seventh Edition Russell C. Hibbeler Structural Analysis, Seventh Edition Russell C. Hibbeler