基于屈服线理论的混凝土护栏计算研究

Calculation Research of Concrete Guardrail Based on Yield Line Theory

2017版交安规范《公路交通安全设施设计规范》(JTG D81-2017)提出了基于屈服线设计理念的混凝土护栏设计,与旧规范中基于强度理论的护栏设计相比,护栏设计的理论基础、设计方法及计算流程均发生了较大的变化。以某SS级混凝土护栏为例,阐述说明屈服线设计理论、护栏不同的碰撞破坏模式及护栏设计方法,旨在为混凝土护栏设计提供参考。

The new specification Design Guidelines for Highway Safety Facilities(JTG D81-2017)proposed the design method of concrete guardrail based on yield line theory.Compared with the design method based on strength theory in the old specification(2006),there exist major changes in theoretical basis,design method and calculation process of the guardrail design.Taking a SS-grade concrete guardrail as an example,this paper expounds the design theory of yield linetheory,different collision failure modesand design method of concrete guardrail,aiming at providing reference for the design of the concrete barrier.