SCIA Project 1

Permanente loads

• Platform finishing layers 0.60 kN/m2

• Glass guardrail 0.45 kN/m2    (0.018 * 1 *2500)  *specific weight of glass 2500 kg/m3

Live Loads

• People load on platform: 4 kN/m2

• People load on stairs: 3kN/m2  

• step width 0.27m  -->  3kN/m2 x 0.27m = 0.81kN/m

• People load on guardrails:

  • Horizontal guardrails 1kNm

  • Inclined guardrails 1kN * 07 = 0.7kNm

Load combinations

Linear combinations

• Automatically created 

• Explode to linear too see all combinations 

Nonlinear combinations

• Use New from combination to create nonlinear from linear combinations

Masses

Mass group from:

• Self weight 

• Permanent load

• Live load

• Snow load (if there is no Live Load)

Combination of mass groups:

• Self weight coefficient: 1

• Permanent load coefficient: 1

• Live load coefficient: 0.3

• Snow load (if there is no Live Load) coefficient: 1

Supports and Hinges

Supports on Stringers (Simple supported VS Rigid in Z-direction) 

When torsion in stringer is too big:

• increase profile size (change to UNP section)

• add connecting profiles between beams (linear braces) 

Rotational stiffness of connections 

Check rottational stiffnes in IDEA Statica and apply same value in SCIA Engineer

• Use stiffnes analysis in IDEA Statica 

• Chose member to be analyzed (in this case column) 

• Separate calculation for stiffnes in Z and Y direction

• Moment value should be big enough so that all parts from connection are well utilized  

• Apply values in Hinges in SCIA Engineer

Rotational stiffness of connections of Secondary beams 

• Torsion in main beam can be absorbed with Rigid or Semi-Rigid connections on secondary beams 

• 4 bolts will add rigidity to the connection

• Best way is to calculate Rotational Stiffness in IDEA Statica or apply practical value 0.5

Wind braces modeling

1. FEM type:  axial force only

2. Beam nonlinearity: tension only 

Sway or Non-Sway

Buckling settings: Sway or Non-Sway

Frequencies