Pay attention to the hidden dangers of glass curtain wall.
-Suggestions on solving the problem of glass curtain wall
Historical events:
The Hancock Building in Boston, designed by I.M. Pei in 197 1, is a glass curtain wall skyscraper that once caused a sensation in Europe and America. However, after the completion, the glass was broken one after another. A storm in 1973 broke dozens of pieces of glass, and the broken glass fell and broke other glasses, so the building was once riddled with holes.
On July 3rd, 2006, Kloc-0, a curtain wall glass of Shanghai CITIC Pacific Building suddenly blew itself up, smashing a moving vehicle and injuring two others.
From 2007 to 2009, there were 12 self-explosion incidents of circular-arc glass in Yu' an Longdu Community, Yubei District, Chongqing, and six cars were smashed by falling glass.
On the night of March 2, 2009, the curtain wall glass on the 36th floor of Shanghai CITIC Pacific Building blew itself up.
On August 29th, 2009, the building of Wuhan Minsheng Bank suddenly began to rain with glass, and the broken glass fell with the wind for more than ten minutes. Two passers-by were injured and the skylight of a car was smashed. According to the property management department, a piece of tempered glass in Building 4 1 was blown off by the strong wind, and it had not been replaced before.
2065438+0010 On February 29th, the large glass on the 9th floor of iSQUARE International Plaza, 63 Nathan Road, Tsim Sha Tsui, Hong Kong, burst and six people were injured.
2011May 18 At noon, a glass curtain wall of Shanghai Pudong Times Financial Center Building suddenly fell from the 46th floor, hitting vehicles parked in the lower parking lot, causing more than 50 vehicles to be damaged to varying degrees.
20 1 1May 18, at night, an accident occurred in the Cohen International Center Building near Yan 'an Middle Road, North Shaanxi Road. Two passing motor vehicles were smashed by glass slag and some paint surfaces were damaged.
……
Through the above cases, we should pay attention to the safety of curtain wall glass. All of the above are tragedies, which should not happen and should not happen again. Of course, how to avoid and improve this hidden danger of human social security should be the subject of each of us and the responsibility of our enterprise.
1 problem generation
The life of> glass curtain wall is generally about 25 years. Once the shelf life has passed, the glass will explode at any time due to internal impurities.
> The silica gel, structural adhesive and aluminum alloy parts of glass curtain wall age or even fail with time, resulting in glass falling; The stipulated quality guarantee period is only 10 to 15 years.
& gt construction problems or man-made damage.
& gt There are no safety inspection, regular repair and replacement measures.
2. The best scheme: paste the building film on the glass curtain wall.
2. 1 Advantages of architectural membrane
* Safety and explosion-proof function.
* Increase the strength of glass, reduce personal injury and protect property, and build an invisible protective net.
* Mitigate and reduce the harm caused by the earthquake.
* Filter glare, reduce glare, and protect skin and eyesight.
* Energy saving and environmental protection, which can block 50%-90% of heat and reduce the high electricity bill caused by air conditioning and heating.
* Block 99% ultraviolet rays and protect indoor articles from fading and aging.
* One-way perspective, privacy protection and comfortable living space.
* Improve the architectural appearance and beautify the indoor living environment.
* Isolate some noise.
* Easy to install and paste, easy to clean and wear-resistant, without special maintenance.
* Economical and practical, colorfast and bubble-free, with long service life.
2.2 Safety advantages of pasting architectural membrane
2.2. 1 probability of avoiding glass curtain wall breaking and falling from buildings
The glass with organic architecture film is broken under strong enough impact, and the glass fragments can be attached to the organic film without splashing around, but form a hole, and the edge of the hole will not be serrated when the film is not attached; Therefore, people can be prevented from falling down after the glass is shattered.
In addition, in the process of film pasting construction, in addition to the adhesive on the film pasting, special adhesive can also be used to stick the frame to the film pasting, so as to delay the falling time of the broken glass and reduce casualties.
Of course, I need to remind you that you must choose high-quality safety building membrane.
2.2.2 Reduce the light pollution of the glass curtain wall.
In summer, the sunlight reflected to the living room makes the room temperature rise by 4 ~ 6℃ on average, and the expenditure on air conditioning increases greatly, which affects people's normal life and use. What's more, people who work and live in white light polluted environment for a long time are prone to vision loss, dizziness, insomnia, palpitation, loss of appetite, depression and other phenomena, which will change people's normal physiology and psychology and induce some diseases over time.
After sticking the film, the problem of rising room temperature can be solved relatively, and the light transmittance can be reduced.
2.3 The case of sticking architectural membrane on glass curtain wall and suggestions from all parties.
2.3. 1 case
The Capitol Hill, Pentagon, Great Hall of the People, Shanghai Jinmao Building, Shanghai Municipal Government Building and other buildings have all adopted film pasting measures to improve the safety of glass and reduce the casualty rate on the premise of energy saving.
2.3.2 Suggestions
In August 2007, the Shanghai Municipal Government paid more attention to the use of laminated glass. Shanghai Construction Committee, Science and Technology Commission, Building Materials Office and other units organized a special study on "Energy-saving and Safety Glass Membrane" in 1997. Did a series of tests. The research results show that coated glass can block more than 95% of solar ultraviolet rays, enhance the toughness and impact strength of glass, and reduce the unreasonable harm caused by glass to people.
On September 1 1 day, 2007, Oriental Morning Post recorded that Sun Jianping, deputy director of the Shanghai Municipal Construction and Transportation Committee, said that it has become an important content of the renovation of the glass curtain wall in Shanghai to put on a thermal insulation safety film to reduce energy consumption.
20 10 rectification plan for unsafe glass curtain wall building of Shanghai Construction Committee: 1) In general, according to the relevant regulations of the Ministry of Construction and Shanghai, it should be replaced with safety glass. 2) If it is unconditionally replaced by safety glass, the glass surface can be pasted with film.
3 appeal
Shanghai Building Curtain Wall Testing Center investigates the current situation of large and medium-sized glass curtain wall projects with an area of more than 200 square meters or a curtain wall height of more than 20 meters. It shows that among the 93/kloc-0 buildings surveyed, about 90 buildings have potential safety hazards, which is close to 10%.
International market of glass curtain wall: Japan restricts the use, Germany prohibits the use, the United States can only guarantee that it will not fall off in 10, and China is a big country in curtain wall glass production and use.
Judging from this market and fact case, we need to make a joint appeal: pay attention to the hidden danger of glass curtain wall and reduce the risk factor.
Shanghai lanxin energy-saving technology co., ltd
20 1 1 June 13