Modify Concrete Materials
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 > Design > RC Design > Modify Concrete Material.
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.