Reconstruction of building curtain wall

To enter the Chinese market in the late 1980s, the curtain wall structure, the Great Wall in Beijing hotel and the establishment of the Shanghai fellowship building marked, building curtain wall industry began to take off, which has more than 30 years, with the passage of time, in recent years, frequent curtain wall problems have aroused widespread concern from all walks of life. To this end, the Ministry of Housing and Urban-Rural Development and provincial offices have been successively issued, emphasizing the importance of safety investigation of the existing curtain wall and the necessity of transformation, in the face of the aging of the existing curtain wall, if not to be effectively transformed and controlled, its harm is self-evident.

Factor analysis of curtain wall reconstruction
Technical factors
The bolt loosening or failure of the rear anchorage embedded parts leads to the destruction of the connection balance system between the curtain wall panel and the main structure; The bolts or screws of the hardware of the opening fan become loose, resulting in the failure and damage of the limiting device of the opening fan.
Due to the lack of anti-corrosion measures in the construction process, steel structures and other steel parts are prone to rust insects, especially the weld parts are easily affected by the external environment, the effective section after corrosion decreases, and the steel parts are easy to fracture and fall off in the presence of strong external forces. The curtain wall with pretension is gradually reduced by external force for a long time and no longer meets the structural stress requirements.
All kinds of adhesive, adhesive strip aging problem, adhesive strip aging leads to the curtain wall water tightness, air tightness reduction, curtain wall structural adhesive, sealant due to more than the service life of cracking loss of bonding, resulting in the curtain wall plate off as a whole.

Stone curtain wall pendant problem, the stone curtain wall used to use T-shaped pendant, the displacement ability is poor, when the structure displacement, the stone plate can effectively offset the displacement, resulting in the plate broken or falling off.
Environmental factors
Green energy saving: the glass curtain wall in the 1990s or earlier is heat reflecting glass, which has light pollution, heat pollution, color pollution, etc.
Subjective factors
In order to adapt to the needs of human development of The Times and enhance the architectural cultural taste, the external facade is transformed. All these reflect the importance of reconstruction of curtain wall.