distributed loads
DESCRIPTION
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. D p/q= fn {2x/B, 2z/B} See Table 5.4. Stress Isobars. Fig 5.14. Example 5.5. - PowerPoint PPT PresentationTRANSCRIPT
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Distributed Loads
Strip Loads (L/B > 9) Wall Footings Embankements
Circular Loads (R) Storage Tanks
Rectangular Loads (BxL) Spread Footings Mat Foundations
Combination Loads
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Strip LoadFig 5.12
p/q= fn {2x/B, 2z/B} See Table 5.4
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Stress Isobars
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Fig 5.14
Example 5.5
q=200 kN/m2, B=6m, z=3m
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Circular LoadsFig 5.15
/q=1-1/[(R/z)2+1]3/2
/q = fn {z/R} (Table 5.5)
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Circular LoadsFig 5.16
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Rectangular LoadsFig 5.17
/q = I2
I2 = fn {m=B/z, n=L/z} Fig 5.18
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Variation of I2
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Rectangular LoadsFig 5.19
A/ q = (I 2-1+ I 2-2+ I 2-3+ I 2-4)
Principle of Superposition
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Stress Isobars
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Combined AreasFig 5.22
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Combined AreasFig 5.23
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Newmark’s Chart
z
= (IV) q M
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Example 5.7
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Example 5.7
Z=3m
=(IV) q M
= 0.005 (600kN/9m2)(48.5) = 17.78 kN/m2
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Newmark’s Chart
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Rectangular LoadsFig 5.19
C’