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DIANA offers concrete shrinkage models for European, American,
and Dutch codes as described in this section.
See Chapter 20 for background theory.
The units of the input data for the concrete shrinkage model
(day, MPa, mm, °C)
refer to the codes and are independent of the units in other input data
or commands.
If a time unit other than SI (seconds) is used for other input data or
commands,
then you must specify the time unit that you used in table
'UNITS' [Vol. Analysis Procedures].
CEB-FIP Model Code 1990 (syntax)
- SHRINN
-
MC1990
indicates the European CEB-FIP Model Code 1990 [16].
- FCM28
- fcm28
is the mean compressive strength
fcm
(in MPa) of a concrete cylinder at the age of twenty-eight days.
- H
- notsiz
is the notational size of the member h
in mm,
h = 2Ac/u
, with
Ac
the cross-section
and u
the perimeter in contact with the atmosphere.
- CEMTYP
- cemtyp
specifies the cement type:
SL for slowly hardening cements,
NR for normal and rapidly hardening cements
or RS for rapidly hardening high strength cements.
[CEMTYP NR]
- RH
- humid
is the relative ambient humidity RH
in %.
[
RH = 80%
]
- CURAGE
-
ti0 is the concrete age in days at the end of the
curing period.
DIANA assumes that during this period no shrinkage occurs.
Default is no curing. [CURAGE 0]
ACI 209 (syntax)
![\begin{figure}\centering
\begin{tabbing}
\texttt{'MATERI'}
\\ [-1.0ex]
\rule{14...
...\>\texttt{CURAGE}\>\texttt{\textit{ti0}}\(_{r}\,\){]} \end{tabbing} \end{figure}](img1361.png)
- SHRINN
-
ACI209
indicates the American Concrete Institute code 209 [1].
- FCM28
-
fcm28 is the mean compressive strength
fcm
(in Mpa) of a concrete cube or cylinder at the age of twenty-eight days.
- H
-
notsiz is the notational size of the member h
in mm,
h = 2Ac/u
, with
Ac
the cross-section
and u
the perimeter in contact with the atmosphere.
- CEMTYP
-
cemtyp specifies the cement type:
I
for class-I cement,
III
for class-III cement.
[CEMENT I]
- RH
- humid
is the relative ambient humidity RH
in %. [
RH = 40%
]
- FINAGG
- agg
is the ratio of fine to total aggregate in %.
[FINAGG 60]
- SLUMP
- slmm
is the slump of concrete slurry in mm.
[SLUMP 70]
- AIRCNT
- air
is the air content in %.
[AIRCNT 7]
- CEMCNT
- cem
is the cement content in
kg/m3
.
[CEMCNT 450]
- CURTYP
- curtyp
specifies a curing method according to
the ACI 209 code [1]:
MOIST for moistening (the default) [MOIST]
or STEAM for curing with steam.
- CURAGE
-
ti0 is the concrete age in days at the end of the
curing period.
Defaults are 7 days for moistening or 3 days for curing with steam.
NEN 6720 (syntax)
- SHRINN
-
NN6720
indicates the Dutch NEN 6720 code [76].
- FCK28
-
fck28 is the characteristic strength
fck
(in MPa) of a concrete cube at the age of twenty-eight days.
Rule of thumb:
fck = fcm - 8
,
with
fcm
the mean compressive strength (in MPa) of
a concrete cube at the age of twenty-eight days.
- H
- notsiz
is the notational size of the member h
in mm,
h = 2Ac/u
, with
Ac
the cross-section
and u
the perimeter in contact with the atmosphere.
- RH
- humid
is the relative ambient humidity RH
in %. [
RH = 80%
]
- OMEGA
-
reinpe is the lowest reinforcement percentage
.
[
= 0
]
- CURAGE
-
ti0 is the concrete age in days at the end of the
curing period.
DIANA assumes that during this period no shrinkage occurs.
Default is no curing. [CURAGE 0]
Next: 9. Special Models
Up: 8.2 Shrinkage
Previous: 8.2.1 Discrete Function
Contents
Index
DIANA-9.3 User's Manual - Material Library
First ed.
Copyright (c) 2008 by TNO DIANA BV.
![\begin{figure}\centering
\begin{tabbing}
\texttt{'MATERI'}
\\ [-1.0ex]
\rule{14...
...\>\texttt{CURAGE}\>\texttt{\textit{ti0}}\(_{r}\,\){]} \end{tabbing} \end{figure}](img1360.png)
![\begin{figure}\centering
\begin{tabbing}
\texttt{'MATERI'}
\\ [-1.0ex]
\rule{14...
...\>\texttt{CURAGE}\>\texttt{\textit{ti0}}\(_{r}\,\){]} \end{tabbing} \end{figure}](img1362.png)