The deflection of the curtain wall glass is also related to the boundary conditions of the glass installation. The curtain wall glass is installed in the frame slot, and the frame of the curtain wall is combined by the connecting members. The curtain wall mullion is a one-way bending member, which is flexed and deformed only in the direction of horizontal wind load, and the horizontal frame of the curtain wall is bidirectionally bent. The rods are flexed and deformed in both the direction of gravity and the direction of horizontal wind load. After the mullion and the horizontal frame are deformed, the edges of the glass panel are not in the same plane, but are twisted, especially in the horizontal frame and When the connection of the mullion is made by a connection with a large degree of freedom (such as a steel pin connection), the relative distortion of the horizontal and vertical frames will be greater, and in extreme weather conditions, the glass panel will be broken due to uneven force.
Under the premise that the glazed glass panel remains intact, the wind-resistant performance of the curtain wall is ultimately determined by the frame members of the curtain wall. Only the curtain wall rods are rigid enough, and the wind-resistant strength of the curtain wall can meet the requirements.
The curtain wall structure design adopts the approximate probability limit state design method in the steel structure design. The probability limit state design method refers to the functional requirements of the structure in the design reference period (generally 50 years): safety, applicability, durability .
Safety: Meet specific load capacity limit states that are compatible with building functions
Applicability: Ensure that the structure meets the requirements in daily use.
Durability: guarantees the duration of the bearing capacity of the structure and the environmental fitness