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...

Shrinkage

...

is

...

a

...

time-dependent

...

volumetric

...

change

...

associated

...

with

...

the

...

drying

...

and

...

moisture

...

transfer,

...

thermal

...

effects

...

and

...

gradients,

...

and

...

autogenous

...

behavior

...

(early-age

...

chemical

...

and

...

structural

...

reactions)

...

of

...

restrained

...

reinforce-concrete

...

(RC)

...

systems.

...

Shrinkage

...

may

...

cause

...

aesthetic,

...

serviceability,

...

and

...

even

...

stability

...

issues

...

with

...

the

...

onset

...

of

...

cracking,

...

curling/warping,

...

and

...

reduced

...

load-carrying

...

capacity.

...

Restraint

...

conditions

...

which

...

affect

...

shrinkage

...

behavior

...

may

...

be

...

external,

...

as

...

with

...

supports,

...

connections,

...

and

...

boundary

...

conditions,

...

or

...

internal,

...

as

...

with

...

differential

...

drying

...

and

...

reinforcement.

...

Shrinkage

...

cracking

...

is

...

mitigated

...

with

...

increased

...

amounts

...

of

...

reinforcement

...

at

...

decreased

...

spacing,

...

and

...

with

...

the

...

inclusion

...

of

...

coarse

...

aggregate

...

which

...

is

...

dense,

...

hard,

...

and

...

less

...

compressible.

...

The

...

proper

...

early-age

...

handling

...

and

...

curing

...

of

...

concrete

...

further

...

mitigates

...

shrinkage

...

while

...

enhancing

...

long-term

...

life

...

expectancy

...

and

...

structural

...

performance.

...

Shrinkage

...

and

...

other

...

time-dependent

...

material

...

behaviors,

...

including

...

creep

...

,

...

aging,

...

and

...

tendon

...

relaxation,

...

may

...

be

...

applied

...

to

...

structural

...

objects

...

using

...

staged-

...

construction

...

analysis.

...

Staged

...

construction

...

is

...

a

...

nonlinear-static

...

application

...

available

...

to

...

CSI Software with Ultimate Levels and Features. Additional information may be found in the CSI Analysis Reference Manual (Staged Construction, page 396).

See Also

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