Fire Technology

, Volume 53, Issue 3, pp 1233–1248 | Cite as

The Breakage of Float Glass with Four-Edge Shading Under the Combined Effect of Wind Loading and Thermal Loading

  • Haodong Chen
  • Han Zhao
  • Yu Wang
  • Qingsong Wang
  • Jinhua Sun
Article

Abstract

The glass breakage in high-rise building fires may be significantly influenced by both the compartment fire and the environmental wind. In this work, float glass panes supported by the frame with a dimension of 600 × 600 × 6 mm3 were employed to study the glass breakage under the combination of wind and fire effects. The first breaking time, glass temperature, crack patterns, and fallout were obtained. With an increase of wind speed, the average value of temperature difference between the mean temperature at the heated exposed side and that at the ambient shaded side decreased gradually when crack initiated. The average time to first crack was maximum without wind loading and decreased gradually as the wind speed increased. Comparing with the glass breakage only under thermal radiation, the combination of environmental wind accelerated the glass breaking. The present results suggest that the wind effect should be considered for building fire protection in the window glass design.

Keywords

Glass breakage Thermal radiation Environmental wind First breaking time 

Nomenclature

E

Young’s modulus (GPa)

Pw

Wind pressure (N/m2)

q

Heat flux (kW/m2)

qr

Radiative heat flux (kW/m2)

T

Temperature (°C)

\( \bar{T} \)

Mean temperature (°C)

v

Wind speed (m/s)

Greek letters

β

Coefficient of linear expansion of glass (K−1)

ρ

Density of air (kg/m3)

σ

Thermal stress (MPa)

Subscripts

1

Point 1

2

Point 2

as

Ambient shaded side

he

Heated exposed side

max

Maximum

min

Minimum

Notes

Acknowledgements

This study is supported by the National Natural Science Foundation of China (Grant Nos. 51578524 and 51120165001). Dr. Q. S. Wang is supported by Youth Innovation Promotion Association CAS (Grant No. 2013286).

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Copyright information

© Springer Science+Business Media New York 2016

Authors and Affiliations

  • Haodong Chen
    • 1
  • Han Zhao
    • 1
  • Yu Wang
    • 1
  • Qingsong Wang
    • 1
    • 2
  • Jinhua Sun
    • 1
    • 2
  1. 1.State Key Laboratory of Fire ScienceUniversity of Science and Technology of ChinaHefeiPeople’s Republic of China
  2. 2.Collaborative Innovation Center for Urban Public SafetyHefeiPeople’s Republic of China

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