Influences of sub-atmospheric pressure on downward flame spread over typical insulation material with parallel glass curtain wall structure in underground buildings

2020 ◽  
Vol 103 ◽  
pp. 103509
Author(s):  
Ran Tu ◽  
Xin Ma ◽  
Yi Zeng ◽  
Xuejin Zhou ◽  
Qixing Zhang ◽  
...  
Keyword(s):  
Flame Spread ◽  
Atmospheric Pressure ◽  
Wall Structure ◽  
Insulation Material ◽  
Curtain Wall ◽  
Glass Curtain Wall ◽  
Downward Flame Spread

Construction Technology Research on Super Glass Curtain Wall of the Henan Art Center

2012 ◽  
Vol 170-173 ◽  
pp. 3212-3215
Author(s):  
Ya Nan Fu ◽  
Hai Tao Mao
Keyword(s):  
Wall Structure ◽  
Tension Stress ◽  
Construction Technology ◽  
Curtain Wall ◽  
Glass Wall ◽  
Factors Affecting ◽  
Structural Wall ◽  
Technical Parameters ◽  
Working Principle ◽  
Glass Curtain Wall

Henan Art Center has a new curtain wall structure - the structure cable net glass wall. Because of the cable net structure for glass curtain wall construction and design difficulties, the design of curtain wall performance to deepen the main points of cable net structural wall of the working principle, design connections, cable net structural wall of the cable construction steps, cable pre-stressing and tension when the technical parameters and under the glass curtain wall materials and installation was introduced. And the main factors affecting the performance curtain wall and the cable tension when the ambient temperature and the tension stress was studied. The results showed that the construction program was optimize and construction quality and safety was ensure.

Mechanical Properties and Calculation Method for Monolayer Cable Net Glass Curtain Wall under Fire Conditions

2014 ◽  
Vol 580-583 ◽  
pp. 2583-2588
Author(s):  
Ling Feng Gong ◽  
Yin Bai ◽  
Si Qi Li
Keyword(s):  
Mechanical Properties ◽  
Critical Temperature ◽  
Calculation Method ◽  
Large Scale ◽  
Wall Structure ◽  
Curtain Wall ◽  
Cable Force ◽  
Simulation Results ◽  
Glass Curtain Wall ◽  
Fire Conditions

The developing trend of large scale curtain wall structure system is monolayer cable net glass curtain wall, so it’s important and necessary to study the corresponding calculation method and mechanical properties under fire conditions. The changing rule of the displacement and the maximum cable force with the temperature was analyzed by making series of numerical calculations, and the principle for determining critical temperature was deeply discussed upon the basis of the numerical simulation results. The critical temperature table considering different spans, grid dimensions and cable diameters is given, and the influence on critical temperature has also been studied when initial prestressed force of vertical cable is relatively small. Some suggestions are proposed finally.

Analysis and Calculation of the Force of Glass Panel of the Point Supported Glass Curtain Wall

2011 ◽  
Vol 255-260 ◽  
pp. 580-586
Author(s):  
Zhi Peng Huo ◽  
Cheng Wei Huang ◽  
Guang Jie Zhang
Keyword(s):  
Maximum Stress ◽  
Wall Structure ◽  
Maximum Deflection ◽  
Glass Panel ◽  
Curtain Wall ◽  
Finite Element Software ◽  
Sheet Structure ◽  
Glass Curtain Wall ◽  
Cloud Atlas ◽  
Elastic Mechanics

Based on elastic mechanics, this article deduced the theoretical value of the maximum stress and maximum deflection of sheet structure which was applied on point supported glass curtain wall structure, and figure out the stress and deflection values by calculation example. After that by simulating the structure with the finite element software ANSYS we drew the cloud atlas of stress and deflection values which we analyzed and compared with the theoretical values. Finally we can work out the error between the theoretical values and simulate value and analysis it.

scholarly journals Understanding Occupants’ Thermal Sensitivity According to Solar Radiation in an Office Building with Glass Curtain Wall Structure

Buildings ◽  
2022 ◽  
Vol 12 (1) ◽  
pp. 58
Author(s):  
Sung-Kyung Kim ◽  
Ji-Hye Ryu ◽  
Hyun-Cheol Seo ◽  
Won-Hwa Hong
Keyword(s):  
Solar Radiation ◽  
Thermal Environment ◽  
Thermal Sensitivity ◽  
Wall Structure ◽  
Curtain Wall ◽  
Indoor Thermal Environment ◽  
Occupant Comfort ◽  
Group A ◽  
Glass Curtain Wall ◽  
Group B

The thermal comfort of occupants in the increasing number of modern buildings with glass curtain wall structures is of significant research interest. As the thermal sensitivity of building occupants varies with building features, situational factors, and the human body’s thermal balance, it is necessary to derive the comfort temperature based on field research, which was conducted in this study in a South Korean office building with a glass curtain wall structure. The influence of solar radiation on the indoor thermal environment and thermal comfort obtained by measurements and occupant questionnaires was analyzed using cumulative graphs and a sensitivity analysis. The observed changes in operative temperature over time confirmed that occupant comfort was significantly affected by the radiant temperature. Based on this result, two groups (Group A near the windows and Group B near the interior corridor) were defined for analysis. Owing to the influx of solar radiation, Group A was more sensitive to changes in the thermal environment (0.67/°C) than Group B (0.49/°C), and the derived comfort temperature for each group differed from the set temperature by approximately ±2 °C. Thus, it was confirmed that the solar radiation introduced through a glass curtain wall building has a direct impact on the indoor thermal environment and occupant comfort according to location.

Experimental Investigation of Downward Flame Spread over RPU Samples

2013 ◽  
Vol 328 ◽  
pp. 921-925
Author(s):  
Yuan Ming Wang ◽  
Yong Ming Zhang ◽  
Heng Ze Zhao ◽  
Lan Ming Zhao
Keyword(s):  
Flame Spread ◽  
Combustion Process ◽  
Flame Height ◽  
Pulsation Frequency ◽  
Insulation Material ◽  
Spread Rate ◽  
Energy Feedback ◽  
Flame Spread Rate ◽  
Sample Width ◽  
Downward Flame Spread

The combustion process of polymer is a complex coupling of energy feedback from flame to fuel surface with degradation of polymer. In this paper, a series of comparative laboratory-scale experiments were carried out to study the effect of sample width on downward flame spread over the rigid polyurethane (RPU) foam, a typical thermal insulation material. The variations of some important parameters such as flame height, pulsation frequency and flame spread rate were measured and analyzed. Results show that if the width fixed, the parameters mentioned above independent with time. If the width less than 25cm, the sample can not burn completely. With the expand of width, average flame height and flame spread rate present the same chang trend that increase first and then decrease and finally reach a steady state, flame pulsation frequency increases first and then decreases since sample width more than 20cm. The heat transfer from flame and pyrolysis zone to virgin region is proportional to the height of flame, and mainly dominated by radioactive regime.

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