According to the basic design theory, the bridge designmethod can be divided into: the elasticdesignmethod and the plastic method.
钢桥的设计方法按其设计理论大体可分为弹性设计方法和塑性设计方法。
2
The designmethod which allows some sections to be part-plastic can improve load-carrying more greatly than elasticdesignmethod does.
采用允许部分截面进入局部塑性状态的设计方法，相比弹性设计结构的承载力大为提高。
3
This paper presents a simple method of calculating various stress and strain components in a four-layered or more elastic layered system, which can be used in flexible pavement design.