Use this function to modify a part of the steel rebar and concrete material
property data, entered during the creation of the analysis model, or to
change the material property data. Modifications that are made here will
not affect the analysis results, but will only be used for automatic design
and strength verification.
From the Main
Menu select Design
> Concrete Design Parameter > Modify Concrete Material.
From the Menu
tab of
the
Tree Menu select Design
> Concrete Design Parameter > Modify Concrete Material.
The following dialog box is used to enter
the data:
Modify Concrete Material dialog box
Material List
Display the steel rebar and concrete material
properties entered during the creation of the analysis model. Select the
material to be modified or changed.
Concrete Material Selection
Display the selected material properties
and modify/change the material property data.
The material property data can be changed
by using the material property database
built-in the program or by directly
entering the changed data.
Procedure
for using the material property database
Select the relevant code and the material name with the mouse.
The reinforcing steel bar standards are specified
similar to the concrete standards and may be changed by the user if necessary.
That is, the concrete and rebar standards need not be the same.
Direct entry
by the user
Select 'None' in the Code field and enter the name of the material to be
used in the Name field. Then, each data field is activated and the following
material property data can be entered :
Specified
Compressive Strength (f'c/fck): Design compressive cylinder strength
of concrete
Short/Long Term Elasticity
Ratio
For serviceability check as per Eurocode
2, the ratios of the modulus of elasticity of reinforcement to the modulus
of elasticity of concrete for short-term and long term can be entered.
Note
- The default value for short-tem is Es/Ec.
- The default value for long-term is 2(Es/Ec).
Direct entry
by the user
Select 'None' in the Code field and enter the name of the material to be
used in the Name field. Then, each data field is activated and the following
material property data can be entered :
Specified
Compressive Strength (f'c/fck): Design compressive cylinder strength
of concrete
Rebar Selection (refer to Note 3)
Code:
Select reinforcing steel standards
Grade of
Main Rebar: Grade of main rebar
Grade of
Sub-Rebar: Grade of sub-rebar (stirrups & ties)
Fy:
Yield strength of main rebar
Fys:
Yield strength of sub-rebar
: Modify the material
property data as defined by the user.
: Do not enter the selection
and close the dialog box.
Note
1
If any of NAME, Ec, f'c, and Grade of the Main Rebar and Grade of the Sub-Rebar
material property data is omitted in the analysis model, the following
values are used:
(1) ASTM(RC)
NAME
= Grade C4000 (4000 lb/in2)
Grade of Main Rebar
= Grade 60 (Fy=60000 lb/in2)
Grade of Sub Rebar
= Grade 60 (Fy=60000 lb/in2)
Wc
= 150 lb/ft3.
Ec(lb/in2,
for analysis)
= 33 X Wc1.5
X f'c0.5
Es
= 2.9 X 107
lb/in2
(2) CSA(RC)
NAME
= C30 (
30 N/mm2)
<-
Strength of Cubic (Fcu).
Grade of Main Rebar
= 400R (Fy=400 N/mm2)
Wc
= 2300 kg/m3
Ec(N/mm2,
for analysis)
= (3300 X f'c0.5
+ 6900) X (Wc / 2300)1.5
Es
= 2.00 X 105
N/mm2
(3) BS(RC)
NAME
= C30 (
30 N/mm2)
<-
Strength of Cubic (Fcu).
Grade of Main Rebar
= SD460 (Fy=460 N/mm2)
Grade of Sub Rebar
= SD460 (Fy=460 N/mm2)
Ec(N/mm2,
for analysis)
= (Fcu/5 + 20.0) X 103
Es
= 2.00 X 105
N/mm2
(4) EN(RC)
NAME
= C25/30 ( 25 N/mm2)
Grade of Main Rebar
= SD400 (Fy=400
N/mm2)
Grade of Sub Rebar
= SD400 (Fy=400
N/mm2)
Ec(N/mm2,
for analysis)
= 9.5 X (Fc+8.0)(1/3)
X 103
Es
= 2.00 X 105
N/mm2
(5) JIS(RC)
NAME
= Fc24 (
24 N/mm2)
Grade of Main Rebar
= SD390 (Fy=390
N/mm2)
Grade of Sub Rebar
= SD390 (Fy=390
N/mm2)
Wc
= 23.0 kN/m3
(If
Fc <= 36 N/mm2)
= 23.5 kN/m3
(If
Fc <= 48 N/mm2)
= 24.0 kN/m3
(If
Fc <= 60 N/mm2)
Ec(lb/in2,
for analysis)
= 3.35 X 104
X (Wc/24)1.5
X (Fc/60)(1/3)
Es
= 2.05 X 105
N/mm2
(6) GB(RC)
NAME
= C25 ( 25 N/mm2)
Grade of Main Rebar
= HRB400 (Fy=400 N/mm2)
Ec(N/mm2,
for analysis)
= 105
/ (2.2 + 34.7 / Fcu)
Es
= 2.00 X 105
N/mm2
(7) GB-Civil(RC)
NAME
= C25 ( 25 N/mm2)
Grade of Main Rebar
= Grade 2 (Fy=400 N/mm2)
Ec(N/mm2,
for analysis)
= 105
/ (2.2 + 33.0 / Fcu)
Es
= 2.10 X 105
N/mm2
Other
Series
= 2.00 X 105
N/mm2
(8) KS(RC)
NAME
= C240 ( 240 kgf/cm2)
Grade of Main Rebar
= SD40 (Fy=4000 kgf/cm2)
Grade of Sub Rebar
= SD40 (Fy=4000 kgf/cm2)
Wc
= 2.4 tonf/m3
Ec(lb/in2,
for analysis)
= 4270 X Wc1.5
X fck0.5 (If
fck <= 300 kgf/cm2)
= 3000 X Wc1.5
X fck0.5 +
70000 (If
fck > 300
kgf/cm2)
Es
= 2.1X106
kgf/cm2
(9) KS-Civil(RC)
NAME
= C240 ( 240 kgf/cm2)
Grade of Main Rebar
= SD40 (Fy=4000 kgf/cm2)
Grade of Sub Rebar
= SD40 (Fy=4000 kgf/cm2)
Wc
= 2.5 tonf/m3
Ec(lb/in2,
for analysis)
= 4270 X Wc1.5
X fck0.5 (If
fck <= 300 kgf/cm2)
= 3000 X Wc1.5
X fck0.5 +
70000 (If
fck > 300
kgf/cm2)
Es
= 2.1 X 106
kgf/cm2
(10) IS (RC)
NAME
= M25 (
25 N/mm^2)
Grade of Main Rebar
= Fe415 (415 N/mm^2)
Grade of Sub Rebar
= Fe415 (415 N/mm^2)
Wc
= 2.5 tonf/m3
Ec (N/mm2, for analysis)
= (3300*f'c^0.5 + 6900) * (Wc/2300)^1.5
Es
= 2.00*10^5 N/mm^2
(11) CNS
(RC)
NAME
= C240 ( 240 kgf/cm^2)
Grade of Main Rebar
= SD42 (4200 kgf/cm^2)
Grade of Sub Rebar
= SD42 (4200 kgf/cm^2)
Ec (N/mm2, for analysis)
= 4270 * Wc^1.5 * fc'^0.5
Es
= 2.04*10^6 kgf/cm^2
Note
2
The concrete standards are classified into None, ASTM(RC), CSA(RC), BS(RC),
EN(RC), JIS(RC), GB(RC), GB-Civil(RC), KS(RC), KS-Civil(RC).
Note
3
The following standards define the moduli of elasticity of concrete:
(1) ACI318-02
= 57000 X f'c0.5
lb/in2
(2) ACI318-99
= 57000 X f'c0.5
lb/in2
(3) ACI318-95
= 57000 X f'c0.5
lb/in2
(4) ACI318-89
= 57000 X f'c0.5
lb/in2
(5)CSA-A23.3-94
=4500*f'c0.5
N/mm2
(6) BS8110-97
= (20 + 0.2 X Fcu) * 103
N/mm2
(7) Eurocode2
= 9.5 X (Fc+8.0)(1/3)
X 103 N/mm2
(8) AIJ-WSD99
= 33500 X (Wc/24)2
* (Fc/60)(1/3)
N/mm2
(9)GB50010-02
= 105
/ (2.2 + 34.7/Fcu) N/mm2
(10) AIK-USD94
= 15000 X f'c0.5
kgf/cm2
(11) KSCE-USD96
= 15000 X fc0.5
kgf/cm2 (If
fc <= 300 kgf/cm2)
= 10500 X fc0.5
+ 70000 kgf/cm. (If
fc > 300
kgf/cm2)
(12) KCI-USD99
= 15000 X fc0.5
kgf/cm2 (If
fc <= 300 kgf/cm2)
= 10500 X fc0.5
+ 70000 kgf/cm2
(If
fc > 300
kgf/cm2)
(13) AIK-WSD2K
= 1.4 X 105
kgf/cm2 (If
Fc <= 300 kgf/cm2)
= 10500 X Fc0.5
+ 70000 kgf/cm2
(If
Fc > 300
kgf/cm2)
Note
4
If "None" is specified in the Code, the program applies the user-defined
material properties to carry out the design.