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scaffolding of box girder calculation-rev1(02).mcdx

SCAFFOLDING OF GIRDER CALCULATION
(S3-S4)
1. 22TCN 200 : 1989 Design process of temporary works and auxiliary equipments For bridge construction
2. TCVN-5575-2012: 1989 Steel structures – Design standard

1. DATA INPUT
Modulus of elasticity:

Es ≔ 200000 MPa

Yield strength:

fy ≔ 210 MPa

Factor of working condition: (6.1.4 of TCVN-5575-2012):

γm ≔ 1.1

Allowable tension and compression stress:

fy
fr ≔ ――
= 190.909 MPa
γm

Allowable shear stress:

fy
τr ≔ 0.58 ⋅ ――

= 110.727 MPa
γm

Seftweight of steel:

kN
γs ≔ 78.5 ――
m3

2. CALCULATION LOADS
2.1 CONCRETE LOAD
Weight density of concrete:

kN
γc ≔ 24.5 ――
m3

Load factor (2.23 of 22TCN 200 : 1989):

γ1 ≔ 1.1

2.2 DUE TO FORMWORK
Load factor (2.23 of 22TCN 200 : 1989):

γfw ≔ 1.2

Formwork loads apply :

kN
qfw ≔ 1.042 ――

m2

2.3 DUE TO SCAFFOLDING
Load factor (2.23 of 22TCN 200 : 1989):

γsca ≔ 1.2

Scaffolding loads apply :

kN
kN
qsca ≔ 0.41 ⋅ 4 ――
= 1.64 ――
2
m
m2

2.4 DUE TO SCAFFOLDING

qH ＝ qo ⋅ k ⋅ c
Load factor (2.23 of 22TCN 200 : 1989):

γsca ≔ 1.0

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scaffolding of box girder calculation-rev1(02).mcdx

Wind pressure (Table 4, 2737-2006) :

Pressure facor consider the changing of wind pressure depend on
height (Table9/22TCN 200-1989):

kN
qo ≔ 0.95 ――
m2
k ≔ 0.65

Aerodynamic factor (Table10/22TCN 200-1989):

c ≔ 1.2

Horizontal wind load:

kN
qH ≔ qo ⋅ k ⋅ c = 0.741 ――
m2

Area apply wind load:

A ≔ 2.8 m ⋅ 51.6 m = 144.48 m 2

Horizontal wind load:

PH ≔ qH ⋅ A = 107.06 kN

Number of nodes in the model:

nnode ≔ 43

Wind load of 1 node in the model:

PH
pnode ≔ ――= 2.49 kN
nnode

2.5 DUE TO PEOPLE AND EQUITMENT
Load factor (2.23 of 22TCN 200 : 1989):

γequ ≔ 1.3

Equitment loads apply :

kN
qequ ≔ 2.00 ――
m2

3. CALCULATION MODEL
3.1 MODEL
Ordinate axis in model:

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scaffolding of box girder calculation-rev1(02).mcdx

Material in model:

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scaffolding of box girder calculation-rev1(02).mcdx

Section propeties in model:

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scaffolding of box girder calculation-rev1(02).mcdx

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scaffolding of box girder calculation-rev1(02).mcdx

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scaffolding of box girder calculation-rev1(02).mcdx

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scaffolding of box girder calculation-rev1(02).mcdx

computational model:

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scaffolding of box girder calculation-rev1(02).mcdx

I600x190x13x25:

H300x300x10x15:

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scaffolding of box girder calculation-rev1(02).mcdx

H200x200x8x12:

3.2 LOAD APPLY IN MODEL:

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scaffolding of box girder calculation-rev1(02).mcdx

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scaffolding of box girder calculation-rev1(02).mcdx

3.3 RESULT:

M (kN*m)

Q (kN)

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scaffolding of box girder calculation-rev1(02).mcdx

I600x190x13x25:

H300x300x10x15:

H200x200x8x12:

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scaffolding of box girder calculation-rev1(02).mcdx

4. CHECK
I600x190x13x25

H300x300x10x15

H200x200x8x12

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scaffolding of box girder calculation-rev1(02).mcdx

4.1 2I600x190x13x25:

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scaffolding of box girder calculation-rev1(02).mcdx

4.2 3I600x190x13x25:

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scaffolding of box girder calculation-rev1(02).mcdx

4.3 H300x300x10x15:

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scaffolding of box girder calculation-rev1(02).mcdx

4.4 H200x200x8x12:

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