[SECT] Steel Composite Section

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Last updated: Apr 29, 2022
33 min read
"SECT": { "SECTTYPE": { "__DESC__": "Type", "__TYPE__": "String" }, "SECT_NAME": { "__DESC__": "Sect Name", "__TYPE__": "String" }, "SECT_AFTER": { "__DESC__": "Sect After", "__TYPE__": { "SECT_I": { "__DESC__": "Sect I", "__TYPE__": { "vSIZE": { "__DESC__": "Size", "__TYPE__": [] } } }, "SLAB": { "__DESC__": "Slab for Only Composite Section", "__TYPE__": [] } } }, "SECT_BEFORE": { "__DESC__": "Sect Before", "__TYPE__": { "SHAPE": { "__DESC__": "Shape", "__TYPE__": "String" }, "OFFSET_PT": { "__DESC__": "Cardinal Point", "__TYPE__": "String" }, "OFFSET_CENTER": { "__DESC__": "Offset Center", "__TYPE__": "Integer" }, "USER_OFFSET_REF": { "__DESC__": "User Offset Ref", "__TYPE__": "Integer" }, "HORZ_OFFSET_OPT": { "__DESC__": "Horizon offset Option", "__TYPE__": "Integer" }, "USERDEF_OFFSET_YI": { "__DESC__": "User Offset YI", "__TYPE__": "Real" }, "VERT_OFFSET_OPT": { "__DESC__": "Vertical Offset Option", "__TYPE__": "Integer" }, "USERDEF_OFFSET_ZI": { "__DESC__": "User Offset ZI", "__TYPE__": "Real" }, "USE_SHEAR_DEFORM": { "__DESC__": "Use Consider Shear Deform", "__TYPE__": "Bool" }, "USE_WARPING_EFFECT": { "__DESC__": "Use Consider Warping Effect", "__TYPE__": "Bool" }, "MATL_ELAST": { "__DESC__": "Matl_Elast", "__TYPE__": "Real" }, "MATL_DENS": { "__DESC__": "Matl_Density", "__TYPE__": "Real" }, "MATL_POIS_S": { "__DESC__": "Matl_Poisson_S", "__TYPE__": "Real" }, "MATL_POIS_C": { "__DESC__": "Matl_Poisson_C", "__TYPE__": "Real" }, "MATL_THERMAL": { "__DESC__": "Matl_Thermal", "__TYPE__": "Real" }, "USE_MULTI_ELAST": { "__DESC__": "Use Multiple ELastic", "__TYPE__": "Bool" }, "LONGTERM_ESEC": { "__DESC__": "Long Term ESEC", "__TYPE__": "Real" }, "SHRINK_ESEC": { "__DESC__": "Shrinkage ESEC", "__TYPE__": "Real" }, "SECT_I": { "__DESC__": "Sect I", "__TYPE__": { "vSIZE": { "__DESC__": "Size", "__TYPE__": [] }, "STIFFENER": { "__DESC__": "Stiffener", "__TYPE__": { "POSITION": { "__DESC__": "Position", "__TYPE__": "Integer" }, "STIFF_CNT": { "__DESC__": "Stiff Array Count", "__TYPE__": [ "Integer", "Integer", "Integer", "Integer" ] }, "STIFF_SHAPE": { "__DESC__": "Stiff Shape", "__TYPE__": [] }, "STIFF_TOP": { "__DESC__": "Stiff Top", "__TYPE__": [] }, "STIFF_BOT": { "__DESC__": "Stiff Bot", "__TYPE__": [] }, "STIFF_LEFT": { "__DESC__": "Stiff Left", "__TYPE__": [] }, "STIFF_RIGHT": { "__DESC__": "Stiff Right", "__TYPE__": [] } } } } } } } }

 

  • Introduce Input Data Symbols

API - Value Type

Input Data

API - Value Type

Input Data

Integer

🔴

Essential

String

❌

Unnecessary

Boolean

🔺

Optional

Real

 

 

 

  • The required Input Data for defining Steel Composite Section

NO.

Name

API - Key

API - Value Type

Default

Steel Composite

NO.

Name

API - Key

API - Value Type

Default

Steel Composite

1

Section Number

“KEY”

 

🔴

2

Section Name

“SECT_NAME”

 

🔴

3

Section Data Type

  • "COMPOSITE"

“SECTTYPE”

 

🔴

 

After Composite Section Properties

4

After Composite

"SECT_AFTER"

 

 

🔴

5

 

"SECT_I"

 

 

🔴

6

Distance from Reference Line (Type2 only)

  • [Sg, Top, Bot.]

"vSIZE"

 

🔴

7

Slab Section Dimensions

  • [Bc, tc, Hh]

"SLAB"

 

🔴

 

Before Composite Section Properties

8

Before Composite

"SECT_BEFORE"

 

 

🔴

9

Section Shape

  • Steel Box : “B”

  • Steel I : “I”

  • Steel Tub : “Tub”

  • Steel Box (Type2) : “GB”

  • Steel I (Type2) : “GI”

  • Steel Tub (Type2) : “GT”

“SHAPE”

 

🔴

10

 

"SECT_I"

 

 

🔴

11

Girder Section Dimensions

"vSIZE"

 

🔴

 

Stiffener

12

 

"STIFFENER"

 

 

🔴

13

Position of Stiffener

  • Both : 0

  • Left : 1

  • Right : 2

"POSITION"

 

🔺

14

Reference of d

  • Top : 0

  • Bottom : 1

"REFERENCE_OF_D"

0

🔺

15

Stiffener Array Count

  • [N Left, N Right, N Bottom, N Top]

"STIFF_CNT"

 

🔴

16

 

"STIFF_SHAPE"

 

 

🔴

17

Stiffener Name

"NAME"

 

🔴

18

Stiffener Type

  • Flat : 0

  • Tee : 1

  • U-Rib : 2

"SHAPE_TYPE"

 

🔴

19

Stiffener Dimension

"SIZE"

 

🔴

20

 

"STIFF_LEFT"

 

 

🔺

21

 

"STIFF_RIGHT"

 

 

🔺

22

 

"STIFF_BOT"

 

 

🔺

23

 

"STIFF_TOP"

 

 

🔺

24

Stiffener Spacing

"SPACING"

 

🔴

25

Stiffener No.

"SHAPE"

 

🔴

26

Calculation option

"USE_CALC"

 

🔴

 

Material Properties of Composite Section

27

Modulus Ratio, (steel / concrete)

"MATL_ELAST"

 

🔴

28

Density Ratio, (steel / concrete)

"MATL_DENS"

0

🔺

29

Poisso's Ratio of Steel

"MATL_POIS_S"

0

🔺

30

Poisson's Ratio of Concrete

"MATL_POIS_C"

0

🔺

31

Ratio of Thermal Expansion Coefficient

"MATL_THERMAL"

0

🔺

32

Multiple Modulus of Elasticity

"USE_MULTI_ELAST"

FALSE

🔺

33

Es / Ec(Creep)

"LONGTERM_ESEC"

0

🔺

34

Es / Ec(Shrinkage)

"SHRINK_ESEC"

0

🔺

 

Offset

35

Offset Direction

“OFFSET_PT”

 

🔺

36

Center Location

“OFFSET_CENTER”

 

🔺

37

Horizontal Offset Option

“HORZ_OFFSET_OPT”

 

🔺

38

Horizontal Offset Value

“USERDEF_OFFSET_YI”

 

🔺

39

Vertical Offset Option

“VERT_OFFSET_OPT”

 

🔺

40

Vertical Offset Value

“USERDEF_OFFSET_ZI”

 

🔺

41

User Type Offset Reference Position

“USER_OFFSET_REF”

 

🔺

 

Additional Option

42

Consider Shear Deformation

“USE_SHEAR_DEFORM”

 

🔺

43

Consider Warping Effect

“USE_WARPING_EFFECT”

 

🔺

 

  • Bc: Effective slab width for one girder

  • tc: Thickness of slab

  • Hh: Distance from the top of girder to the underside of slab

 

  • The JSON format example for inputting Steel Composite Section

"SECT": { "101": { "SECTTYPE": "COMPOSITE", "SECT_NAME": "S_box_T1", "SECT_AFTER": { "SLAB": [ 1, 0.1, 0.05 ] }, "SECT_BEFORE": { "MATL_ELAST": 1.1, "MATL_DENS": 1.2, "MATL_POIS_S": 0.03, "MATL_POIS_C": 0.02, "MATL_THERMAL": 1.5, "USE_MULTI_ELAST": false, "OFFSET_PT": "CC", "OFFSET_CENTER": 0, "USER_OFFSET_REF": 0, "HORZ_OFFSET_OPT": 0, "USERDEF_OFFSET_YI": 0, "VERT_OFFSET_OPT": 0, "USERDEF_OFFSET_ZI": 0, "USE_SHEAR_DEFORM": true, "USE_WARPING_EFFECT": false, "SHAPE": "B", "SECT_I": { "vSIZE": [ 0.5, 0.05, 0.6, 0.15, 0.06, 0.4, 0.16, 0.04 ] } } } }

 

"SECT": { "102": { "SECTTYPE": "COMPOSITE", "SECT_NAME": "S_box_T1_S", "SECT_AFTER": { "SLAB": [ 1, 0.1, 0.05 ] }, "SECT_BEFORE": { "MATL_ELAST": 1.1, "MATL_DENS": 1.2, "MATL_POIS_S": 0.03, "MATL_POIS_C": 0.02, "MATL_THERMAL": 1.5, "USE_MULTI_ELAST": false, "OFFSET_PT": "CC", "OFFSET_CENTER": 0, "USER_OFFSET_REF": 0, "HORZ_OFFSET_OPT": 0, "USERDEF_OFFSET_YI": 0, "VERT_OFFSET_OPT": 0, "USERDEF_OFFSET_ZI": 0, "USE_SHEAR_DEFORM": true, "USE_WARPING_EFFECT": false, "SHAPE": "B", "SECT_I": { "vSIZE": [ 0.5, 0.05, 0.6, 0.15, 0.06, 0.4, 0.16, 0.04 ], "STIFFENER": { "POSITION": 0, "REFERENCE_OF_D": 0, "STIFF_CNT": [ 3, 2, 1, 1 ], "STIFF_SHAPE": [ { "NAME": "S_1", "SHAPE_TYPE": 0, "SIZE": [ 0.1, 0.1 ] }, { "NAME": "S_2", "SHAPE_TYPE": 1, "SIZE": [ 0.1, 0.1, 0.01, 0.01 ] }, { "NAME": "S_3", "SHAPE_TYPE": 2, "SIZE": [ 0.1, 0.1, 0.08, 0.01, 0.01 ] } ], "STIFF_TOP": [ { "SPACING": 0.1, "SHAPE": 0, "USE_CALC": true } ], "STIFF_BOT": [ { "SPACING": 0.1, "SHAPE": 2, "USE_CALC": true } ], "STIFF_LEFT": [ { "SPACING": 0.1, "SHAPE": 0, "USE_CALC": true }, { "SPACING": 0.1, "SHAPE": 1, "USE_CALC": true }, { "SPACING": 0.1, "SHAPE": 2, "USE_CALC": true } ], "STIFF_RIGHT": [ { "SPACING": 0.1, "SHAPE": 0, "USE_CALC": true }, { "SPACING": 0.1, "SHAPE": 1, "USE_CALC": true } ] } } } } }

 

"SECT": { "3": { "SECTTYPE": "COMPOSITE", "SECT_NAME": "S_I_T2", "SECT_AFTER": { "SECT_I": { "vSIZE": [ 1.1, 1.2, 1.3 ] }, "SLAB": [ 1.4, 0.11, 0.12 ] }, "SECT_BEFORE": { "MATL_ELAST": 1.11, "MATL_DENS": 1.12, "MATL_POIS_S": 0.05, "MATL_POIS_C": 0.04, "MATL_THERMAL": 1.13, "USE_MULTI_ELAST": false, "OFFSET_PT": "CC", "OFFSET_CENTER": 0, "USER_OFFSET_REF": 0, "HORZ_OFFSET_OPT": 0, "USERDEF_OFFSET_YI": 0, "VERT_OFFSET_OPT": 0, "USERDEF_OFFSET_ZI": 0, "USE_SHEAR_DEFORM": true, "USE_WARPING_EFFECT": false, "SHAPE": "GI", "SECT_I": { "vSIZE": [ 1.5, 1.6, 1.7, 1.8, 1.9, 0.13, 0.14, 0.15 ] } } } }