Raft Design

[civilman123]

Hello everyone.

For the design of a raft foundation with movement joints:

1) If there are no expansion joints in the slab and there are only partial contraction joints every say 7.5 across the length (50% of reinforcement to continue through joint), I assume that the pressure can spread through the partial contraction joint?
2)If there are both expansion joints in the slab (every 30m across the length) as well as partial contraction joints every 7.5m then the pressure will spread throught the contraction joints, but not through the expansion joints?

Many thanks

 

[HTURKAK]

More info. necessary. I think the question is for construction joints. The concrete placed with phasing. The first section placed and let for dry and then place another section adjacent to it. The rebar is continuous.
Partial contraction joints are used for liquid containment structures and need to have waterstops for watertightness and
with 50% of the reinforcement passing through them. Internal force will through the contraction joints.


The expansion joints are constructed with a gap to allow movement . There is no structural continuity btw sections divided by expansion joints .








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