A horizontal, twin-span bridge structure of length L = 40 m is illustrated diagrammatically in the...

 

Transcribed Image Text:

A horizontal, twin-span bridge structure of length L = 40 m is illustrated diagrammatically in the figure below. The bridge is located at an effective height of 48 m and is exposed to a wind profile of the form V₂ = 14.9z0.17, where z is measured above the zero plane. Additional data are as follows: In = 0.15, *Lu = 326m, zo = 0.03m Calculate: (a) the appropriate length scale of turbulence for response to along-wind turbulence: 'Li = [4 marks] m (b) the background load factor JB associated with bending moment at P₂: JB = [4 marks] (c) the r.m.s. of the fluctuating bending moment, GM, at P₂, given the reference load effect for moment at P2, EMref = 29.8kNm,: OM = kNm [4 marks] (d) the expected maximum bending moment at P2: EMmax = [2 marks] L + P₂ } kNm A horizontal, twin-span bridge structure of length L = 40 m is illustrated diagrammatically in the figure below. The bridge is located at an effective height of 48 m and is exposed to a wind profile of the form V₂ = 14.9z0.17, where z is measured above the zero plane. Additional data are as follows: In = 0.15, *Lu = 326m, zo = 0.03m Calculate: (a) the appropriate length scale of turbulence for response to along-wind turbulence: 'Li = [4 marks] m (b) the background load factor JB associated with bending moment at P₂: JB = [4 marks] (c) the r.m.s. of the fluctuating bending moment, GM, at P₂, given the reference load effect for moment at P2, EMref = 29.8kNm,: OM = kNm [4 marks] (d) the expected maximum bending moment at P2: EMmax = [2 marks] L + P₂ } kNm

Answer rating: 100% (QA)

Silicic Intermediate or Mafic Rock The classification of igneous rocks into si... View the full answer