a) With the aid of the design chart given, evaluate the settlement (in mm) of the above square footing under the influence of the water table if the allowable bearing pressure (q_allow) is given as 2,500 kN/m².

Note that you have to convert the square footing to circular footing to use the design chart

b) If the immediate next column to this particular one settles 125.5 mm and the column spacing is 6.1 m, what is the angular distortion (dimensionless) of the building at this location?

You will need your previous answer from the question immediately above to work on this question.

c) Using the appropriate chart provided, how critical is the structural health of the building?

Note: Select only one answer

A) Visible cracks in brick in-fill panels

B) Level of overstress in diagonal members becomes significant

C) Structural damage to the building is expected

D) Damage to building frames observable
 
 
 

Figure 3 shows a square footing with B = 2.5m. The water table is deep enough to be ignored. The footing rests at depth, D = 1.5m from the ground surface. The dry unit weight and cohesion of the surrounding dense silty sand are 20kN/m and 10 kN/m, respectively. Use Terzaghi's method to solve this problem. D = 1.5m h = 4.0m qallow = 2500 kN/m B = 2.5m Dense silty sand Ydry = 20 kN/m Ysat 22 kN/m c' = 10 kN/m E = 50,000 kN/m v = 0.2 Bedrock Figure 3. Square footing on dense silty sand