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Structural Analysis I

Dr. Khair Al-Deen Bsisu

Lecture 3

Quick Quiz

• (^) What are the forces in a truss member? Axial Forces, tension or compresion
• (^) What are the forces in a beam member? Bending moment, Shear
• (^) What is the force in a cable? Tension
• (^) What is the force in an arch? Compression
• (^) What is meant by dead load? Fixed load
• (^) What is meant by live load? Moving load

Wind Load

Design Wind Pressure for Enclosed Buildings Application of Eq. 1– will involve calculations of wind pressures from each side of the building, with due considerations for the possibility of either positive or negative pressures acting on the building’s interior.

Design Wind Pressure for Signs (اللوحات اإلعالنيه)

• (^) If the structure represents a sign, the wind will produce a resultant force acting on the face of the sign which is determined from

Snow Loads roof loading due to snow can be quite severe, and therefore protection against possible failure is of primary concern. Design loadings typically depend on the building’s general shape and roof geometry, wind exposure, location, its importance, and whether or not it is heated.

If a roof is flat, defined as having a slope of less than 5%, then the pressure loading on the roof can be obtained by modifying the ground snow loading, by the following empirical formula:

Finding a seismic response coefficient

Hydrostatic and Soil Pressure

• (^) When structures are used to retain water, soil, or granular materials, the pressure developed by these loadings becomes an important criterion for their design.
• (^) Examples of such types of structures include tanks, dams, and retaining walls.