建筑施工中,脚手架倒塌事故时有发生。造成脚手架倒塌事故的原因主要是脚手架失稳。因忽视结构稳定性问题而发生的其它建筑事故也不少,由此造成的经济损失和人员伤亡也比较严重。本文主要讨论脚手架失稳倒塌问题。脚手架失稳是一种整体失稳,但失稳的原因与单根压杆失稳相仿,只要明白压杆稳定理论并在施工中谨慎作业,脚手架失稳事故是可以避免 In the construction of the building, scaffolding collapse accidents occur from time to time. Scaffold collapse accidents are mainly caused by instability of scaffolding. There are also a number of other construction accidents that have occurred due to neglect of structural stability issues. The resulting economic losses and casualties are also serious. This article mainly discusses the problem of unstable collapse of scaffolding. Scaffold instability is an overall loss of stability, but the cause of instability is similar to the instability of a single pressure bar. As long as the stability theory of the pressure bar is understood and operations are performed with care during construction, scaffolding instability can be avoided.