Distributed Loads Strip Loads (L/B > 9) Wall Footings Embankements Circular Loads (R) Storage Tanks Rectangular Loads (BxL) Spread Footings Mat Foundations Combination Loads

Strip Load Fig 5.12 p/q= fn {2x/B, 2z/B} See Table 5.4

Stress Isobars

Fig 5.14 Example 5.5 q=200 kN/m 2, B=6m, z=3m

Circular Loads Fig 5.15  /q=1-1/[(R/z) 2 +1] 3/2  /q = fn {z/R} (Table 5.5)

Circular Loads Fig 5.16

Rectangular Loads Fig 5.17  /q = I 2 I 2 = fn {m=B/z, n=L/z} Fig 5.18

Variation of I 2

Rectangular Loads Fig 5.19  A / q = (I I I I 2-4 ) Principle of Superposition

Stress Isobars

Combined Areas Fig 5.22

Combined Areas Fig 5.23

Newmark’s Chart z  = (IV) q M

Example 5.7

Z=3m  =(IV) q M  = (600kN/9m 2 )(48.5)  = kN/m 2

Newmark’s Chart

Rectangular Loads Fig 5.19 C’