Question
Download Solution PDFTo study the wind pressure effect on a hollow circular chimney, the projected area calculation is given as:
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFConcept:
Chimney:
- Only two main forces are considered on the chimney, one due to wind pressure and the other due to the self-weight of the chimney.
- Direct stresses are developed due to the self-weight of the chimney and bending stresses are developed due to wind pressure on the chimney.
- For stress calculations or analysis of forces on a chimney, the wind pressure is assumed to act on the projected area of the chimney.
Calculation:
Projected area:
- The projected area is the area where the wind hits (or strikes) the chimney.
- Therefore this area is equal to the width of the outer face where the wind strikes multiplied by the height of the chimney.
- Projected area = (Height of chimney) × (External diameter of chimney shaft)
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