D13.D.2 Design Parameters

Values of parameters do not depend on the UNIT command.

Commands for calculation of reinforcement are located in the input data file after the command of analysis and as a rule, after output commands to print results of calculation.

Table 1. Parameters for concrete design according to Russian Code SP 63.1330.2012
Parameter Name	Default Value	Description
CODE	-	Must be assigned as `RUSSIAN` Design code to follow. See TR.48.1 Parameter Specifications.
BCL	15	Compression class of concrete
CL	0.05	(Slabs/Walls) Distance from top/bottom face of slab/wall element to the center of the longitudinal reinforcing bars located in the first local (x) direction (i.e., main thickness of top/bottom concrete cover for slab/wall elements)
CL1	0.05	(Beams) Distance from the top or bottom edge of the beam cross section to the center of longitudinal reinforcement (Columns) Distance from the edge of the column cross section to the center of the longitudinal reinforcing bars
CL2	0.05	(Beams) Distance from left/right side of the beam cross section to the center of longitudinal reinforcement
CRA	0.05	(Slabs/Walls) Distance from top/bottom face of slab/wall element to the center of the transverse reinforcing bars located in the second local (y) direction (i.e., secondary thickness of top/bottom concrete cover for slab/wall elements)
DD1	16	(Beams) Diameter of the longitudinal reinforcement bars in the beam tension zone (Columns) Minimum diameter of longitudinal reinforcement bars for the column
DD2	16	(Beams) Diameter of the shear reinforcement bars for the beam (Columns) Maximum diameter of longitudinal reinforcement bars for the column
DEPTH	YD	(Beams) Design depth of beam the section. Used for design only, with the default value taken as the `YD` dimension in the member properties.
EFA	0	(Beams) Face of support location at the end of the beam
ELY	1	(Columns) Length coefficient to evaluate slenderness effects in the local Y axis
ELZ	1	(Columns) Length coefficient to evaluate slenderness effects in the local Z axis
FWB	ZB	(Beams) Design width of the beam's bottom flange. Used for design only, with the default value taken as the `ZB` dimension in the member properties.
FWT	ZD	(Beams) Design width of the beam's top flange. Used for design only, with the default value taken as the `ZD` dimension in the member properties.
MMA	0	(Slabs/Walls) Design parameter of slab/wall reinforcement: 0. reinforcement calculation applied by stresses in local axis 1. reinforcement calculation applied by principal stresses
MMB	1	(Slabs/Walls) Design parameter of slab/wall reinforcement: 0. the effect of additional eccentricity is not considered 1. the effect of additional eccentricity is considered
NLT	1	Load case ID number of the long-term load case
NSE	13	(Beams) Number of equally spaced sections used for beam design. The upper limit is 20.
RCL	3	Class of longitudinal reinforcement: 1. A240 2. A400 3. A500 4. A600
RSH		(Beams) Class of shear reinforcement: 1. A240 2. A400 3. A500 4. A600
SDX	16	(Slabs/Walls) Diameter of reinforcing bars located in the first local (X) direction
SDY	16	(Slabs/Walls) Diameter of reinforcing bars located in the second local (Y) direction
SELX	0	(Slabs/Walls) Design length of wall member to evaluate slenderness effects in local X axis
SELY	0	(Slabs/Walls) Design length of wall member to evaluate slenderness effects in local Y axis
SFA	0	(Beams) Face of support location at the start of the beam
SSE		(Beam) Limit state parameter for beam design: 0. reinforcement amount calculated for required load capacity (i.e., the first limit state) 1. reinforcement amount calculated for cracking requirements (i.e., the second limit state)
STA	0	(Slabs/Walls) Parameter of limit state for slab/wall design: 0. non symmetric reinforcement amount calculated for required load capacity (i.e., the first limit state) 1. symmetric reinforcement amount calculated for required load capacity (i.e., the first limit state) 2. non symmetric reinforcement amount calculated for cracking requirements (i.e., the second limit state) 3. symmetric reinforcement amount calculated for cracking requirements (i.e., the second limit state)
TEM	0	Parameter of concrete hardening conditions: 0. normal concrete 1. fine-grain concrete 2. (Beams and Columns) fine-grain, steam hardened concrete
UB2	0.9	(Slabs/Walls) Specific service conditions coefficient for concrete, γ_b
UBM	1	Product of service conditions coefficients for concrete, except for γ_b in the case of slabs or walls (see `UB2`)
USM	1	(Beams and Columns) Total product of service conditions coefficients for longitudinal reinforcement, γ_s
WLT	0.3	(Beams and Slabs/Walls) Ultimate width of long-term crack
WST	0.4	(Beams and Slabs/Walls) Ultimate width of short-term crack.

Example

STAAD

…

UNIT  MM
MEMBER  PROPERTIES
*  Columns of rectangular cross-section
1  TO  16  PRI  YD  350.  ZD  350.
*  Columns of circular cross-section
17  TO  22  PRI  YD  350.
*  Beams of T cross-section
23  TO  40  PRI  YD  450.  ZD  550.  YB  230.  ZB  200.
UNIT  METER
ELEMENT  PROPERTY
41  TO  100 THICKNESS  0.14
101  TO  252 THICKNESS  0.16
* Flange of T beams is located at the bottom zone of cross-section
BETA  180.  MEMB  23  TO  40

…

*  Command of analysis
PERFORM  ANALYSIS
…
* Output command to print results of calculation (according to user’s judgment)
…
*  Command of loading and their combinations considered in design
LOAD  LIST  1  5  TO  9
*  Command to start reinforcement calculation procedure
START  CONCRETE  DESIGN
CODE  RUSSIAN
* List of parameters being used in reinforcement calculation
…
…
BCL  20.  MEMB  17  TO  22  
CL1  0.04  MEMB  1  TO  40
DD2  10.  MEMB  23  TO  40
CRA 0.036  MEMB  41  TO  252

…
* Command of beam reinforcement calculation
DESIGN  BEAM  23  TO  40
* Command of column reinforcement calculation
DESIGN  COLUMN  1  TO  22
* Command of calculation 2D elements (slabs, walls, shells)
DESIGN  ELEMENT  41  TO  252

* Command of interruption of the reinforcement calculation