Frame classification<br>6.3.1 overview<br>The lateral stiffness of the frame affects its buckling strength. Elastic critical load factor calculated according to Clause 6.3.2 λ cr<br>Frames can be classified into three categories: frames without lateral displacement, frames with lateral displacement and frames that are particularly sensitive to lateral displacement,<br>The purpose of this classification is to:<br>(1) In this chapter, the lateral stability of the structure classified by the frame is evaluated;<br>(2) Calculate the amplified bending moment according to clause 6.6.2
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