According to Article 2 and Article 6 of the Regulations on the Administration of Building Safety Glass (FGYJ [2003] 2116), building curtain walls must use safety glass.
(5) The stone panel is cracked, chipped, and flashing, causing the panel to fall.
Technical Code for Glass Curtain Wall Engineering JGJ102 stipulates that: 1) Frame-supported glass curtain walls should be made of safety glass; 2) The panel glass of point-supported glass curtain wall shall be tempered glass; 3) The glass rib of point-supported glass curtain wall supported by glass rib shall be tempered laminated glass; 4) The safety glass shall be used for the glass curtain wall of the public places with high personnel flow density, activities of teenagers or children, and the parts that are easy to be hit during use.
according to the panel material.
According to the form of supporting structure, it is divided into component type, unit type, point support, full glass, cable type curtain wall, etc.
In the event of an accident, it is easy to cause pedestrian casualties and vehicle damage.
The beautiful appearance of the curtain wall is “hidden murder”.
If the bonding performance of structural adhesive is found to be insufficient, the curtain wall shall be reconstructed or strengthened as soon as possible.
(2) For cracked, damaged, self-explosed and loose curtain wall panels, it is recommended to replace them as soon as possible, and seal the new panels with the surrounding panels.
Source: structure identification, authorized
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On October 11, 2020, the glass curtain wall outside the first office building in Baotou fell down on the 23rd floor, resulting in more than 20 damaged vehicles.
The old lady who passed downstairs was injured by the fragments and sent to the hospital for treatment.
In combination with years of curtain wall inspection engineering experience, this paper introduces common existing building curtain wall diseases and treatment suggestions, So that the curtain wall design and use and maintenance units can prevent accidents in advance.
From May 11-13, 2023, the 8th International Conference on Seismic Technology of Building Structures in Hangzhou (click here for details), since the mid-1980s, building curtain walls have been widely used due to their strong artistic effect, light weight, non-wet operation, short construction period, easy maintenance and replacement and other advantages.
02 Common disease types of existing building curtain wall 2.1 Curtain wall panel damage and defects (1) panel cracking and tempered glass self-explosion tempered glass self-explosion ordinary glass collision cracking (2) glass quality defects, such as scratches, bubbles, pinholes, nodules and other glass bubbles, pinholes (3) poor sealing, resulting in air leakage of glass hollow layer Misting and water inlet hollow layer Misting hollow layer water inlet (4) Partial use of common glass and other non-safety glass, which does not meet the requirements of relevant national standards and documents.
Partial corner loss due to stone penetration cracking 2.2 Damage and defects of curtain wall colloid (1) Quality defects such as missing sealant, thin adhesive layer or holes during construction (2) Long-term use, sealant hardening, aging, cracking, falling off, etc., resulting in water leakage of curtain wall (3) The sealant is damaged by bird pecking (4) The structural glue between the inner and outer glass is aging, The decrease of the bonding strength caused the falling of the outer glass sheet of the curtain wall and the falling of the outer glass sheet of the curtain wall 2.3 Damage and defect of the opening fan of the curtain wall (1) The opening fan could not be opened and closed normally.
Trapezoid Rubber Magnetic Chamfer
In recent years, curtain wall fall accidents caused by the increase in the service life of curtain wall, construction defects, glass self-explosion and other reasons are high, and some curtain walls have become major safety hazards affecting urban safety.
01 The classification of building curtain wall can be divided into glass curtain wall, stone curtain wall, metal curtain wall, artificial panel, etc.
(5) After the curtain wall has been used for 10 years, the adhesive performance of the structural adhesive shall be spot checked; Check every 3 years thereafter.
(4) It is suggested that the curtain wall sealant should be re-glued regularly and the maintenance of the curtain wall during use should be strengthened.
(6) In case of typhoon, earthquake, fire and other natural disasters, the curtain wall shall be comprehensively inspected after the disaster, and repaired and reinforced according to the degree of damage.
At present, the annual production capacity of curtain walls in China is far more than 100 million square meters, and the scale and volume of building curtain walls are increasing year by year.
On March 1, 2010, on the second floor of a commercial plaza in Yuexiu District, Guangzhou City, Guangdong Province, a window glass with a length of 4 meters and a width of 1.5 meters burst, and the fragments flew down from the sky.
The curtain wall is generally set at the periphery of the building.
(3) If the curtain wall components and connectors are damaged, or the anchors between the connectors and the main structure are loose or fall off, they should be replaced or reinforced in time.
The hinge is damaged and the hinge falls off (3) The handle of the opening fan is loose, damaged or missing, and the sealing is poor.
(2) The hinge of the opening fan is damaged or fell off.
At about 21:00 on June 10, 2015, a BMW car parked at the south side of Block A, Tianyi City, Xingtai City was unfortunately damaged by a piece of tempered glass falling from a height of 20 meters on June 27, 2016, A curtain wall glass between the fourth and fifth floors of the Shenzhen Ping An Financial Center construction site, located at the second road in the center of Shenzhen, burst suddenly.
The falling glass fragments injured four workers working downstairs in varying degrees.
The opening fan handle is missing and the opening fan handle is damaged 2.4 The damage and defect of the curtain wall holding (1) The connection performance of the beam and column is poor (2) The keel is seriously rusted or deformed 2.5 The damage and defect of the connection between the curtain wall and the main structure (1) The connection anchor bolt is missing or damaged, the connection performance is poor, and there are some rear anchors (2) The concrete at the embedded parts is cracked or damaged 03 The treatment of the existing building curtain wall diseases is aimed at the above curtain wall diseases, It is recommended to take the following measures: (1) If the curtain wall uses non-safety glass, it is recommended to directly replace the area with safety glass where people and vehicles flow intensively; If it is difficult to replace the glass, the glass surface can be coated with a film (anti-flying film) to prevent the glass from falling down and causing safety accidents.
