1、The background of light reflection impact analysis of building glass curtain wall：

The building glass curtain wall not only improves the appearance of the city, but also brings certain light pollution. The light pollution caused by the building glass curtain wall is glare pollution.

When the sunlight irradiates the building glass curtain wall, the glass mirror reflection light on its surface may cause the glare effect of the surrounding crowd or sensitive target. Glare is a visual condition that causes discomfort or reduces the ability to observe objects in the field of vision due to inappropriate brightness distribution, or excessive brightness variation range, or extreme brightness contrast in space or time.

Since 2011 and 2012, local environmental protection departments have received a significant increase in the number of complaints from the public about the light pollution of building glass curtain walls, making the problem of light reflection of glass curtain walls increasingly prominent. With more and more complaints about the light reflection of glass curtain walls, it has attracted the attention of relevant national departments, experts and media. In order to control the reflected light impact of urban building glass curtain walls, China has put forward corresponding requirements for the prevention and control of the light pollution impact of building glass curtain walls and introduced some standards and regulations.

2、The background of tructural safety demonstration of building glass curtain wall：

With the development of economy and the acceleration of urbanization, more and more construction projects adopt the form of curtain wall, a lightweight envelope structure, and even some complex special-shaped buildings also use curtain wall as the facade of the building.

However, with the passage of time, more and more problems have arisen in the use of curtain wall, such as safety problems and functional problems. There are many reasons, both lack of cognition and lack of experience, such as lagging norms, lack of supervision, and safety problems caused by ignoring the one-sided pursuit of quality and economy, all of which cause losses to users' lives and property.

In this context, Shanghai, Zhejiang and other regions have issued a notice on the implementation of tructural safety demonstration of building glass curtain wall, put forward targeted requirements for curtain wall design and construction quality, and strengthened the control of curtain wall safety.

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