ADVANCED DESIGN OF GLASS STRUCTURES - … in Prague ADVANCED DESIGN OF GLASS STRUCTURES Lecture L3 / E1_ME Design of glass for acoustic barrier Martina Eliášová …

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ADVANCED DESIGN OF GLASS STRUCTURES

Lecture L3 / E1_ME

Design of glass for acoustic barrier

Martina Eliášová

European Erasmus Mundus Master Course Sustainable Constructions

under Natural Hazards and Catastrophic Events 520121-1-2011-1-CZ-ERA MUNDUS-EMMC

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Objectives of the lecture • Design of glass pane for acoustic barrier Design a glass pane for acoustic barrier along the highway with total length 50m. Assume laminated glass compound of two heat strengthened glass panels with thickness 2x 8mm and thickness of PVB interlayer 1,5 mm. The height of barrier is c1 3m and the width 2m, glass panes are simple supported along two edges by a steel profile HEB160. The glass panes are loaded by wind load wk = c2 1,0 kN/m2.

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Example of transparent acoustic barrier

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Design procedure 1. Determination of allowable stress for pre-stressed glass

where according to the prEN13474-1

0,1n

nAm

kg

V

kgkbdg k

fk

fff

,

mod,,

,

MPaf kb 70,

04,0AkA A…. area of the glass pane

Modification factor kmod

MPaf kg 45,

national factor

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Design procedure

Partial factors m and V

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Design procedure 2. Effective thickness for laminated glass – short term load (wind), according

to the prEN13 474-2, Annex

Shear transfer coefficient : = 1,0

3. Determination of maximum tensile stress for rectangular pane supported on two opposite edges

4. Verification

i

iwefef hhh ,,

deff

eff fha2

2

699,0

Fkd wf 5,1F

dgeff f ,

[mm]

[N/mm2]

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Thank you for your kind attention

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