一、塑性极限分析的一般概念确定弹塑性结构的极限承载能力(即塑性极限承载能力,下同)的方法有两种。第一种方法是研究随着载荷的不断增加,结构由弹性状态过渡到弹塑性状态,最后达到极限状态,从而失去承载能力。由于在塑性力学中,其物理关系是非线性的,用这种方法解决工程实际问题时,往往遇到许多数学上 First, the general concept of plastic limit analysis To determine the ultimate load-carrying capacity of elastoplastic structure (ie, plastic ultimate load-bearing capacity, the same below) there are two ways. The first method is to study the structure as the load increases, the structure transitions from the elastic state to the elastic-plastic state and finally reaches the limit state, thus losing the carrying capacity. Due to its non-linear physical relationship in plastic mechanics, it is often encountered mathematically when solving practical engineering problems in this way