A total load of 900 kN is uniformly distributed over a rectangular footing of size 3 x 2 m shown in Fig. 2. Due to the load on this footing, using influence factors determine the vertical stress at a depth of 2.5 m

1- Under the corner at point C

2- Under the center D.

3- If another footing of size 3 x 1 m with a total load of 450 kN is constructed adjoining the previous footing, what is the additional stress at point C at the same depth due to the construction of the second footing?

4- Using Newmark’s chart, determine the vertical stress due two both footings at a depth of 2.5 m under point E.

 

2 m D 3 m ELI C 1 m Tim 3 m