基于屈服线理论的桥梁混凝土护栏计算分析  

Calculation and Analysis of Bridge Concrete Guardrail Based on Yield Line Theory

作　　者：胡孔亮 HU Kong-liang(Hefei Municipal Design Research Institute Co,Ltd,Hefei 230000,China)

机构地区：[1]合肥市市政设计研究总院有限公司,合肥230000

出　　处：《建材世界》2024年第2期102-106,共5页The World of Building Materials

摘　　要：《公路交通安全设施设计细则》(JTG/T D81—2017)提出了混凝土防撞护栏的屈服线设计方法。屈服线分析方法考虑了车护栏间动力学反应和能量守恒原理等理论,应用塑性状态求解护栏碰撞时的临界长度和荷载横向抗力标准值。论文阐述了基于屈服线理论进行混凝土护栏设计的基本原理和求解公式,以某快速路桥梁SS级加强型混凝土护栏为案例,介绍了屈服线理论进行护栏设计的整体计算过程。Guidelines for Design of Highway Safety Facilities(JTG/T D81—2017)put forward the method of yield line theory for concrete crash barrier.The yield line analysis method takes into account the dynamic response between the vehicle and the guardrail,as well as the principle of energy conservation,and apply the plastic state to solve the critical length and load lateral resistance standard value of guardrail collision.This article introduces the basic principle and solving formula of concrete guardrail design based on yield line theory.Taking the SS grade reinforced concrete guardrail of a certain expressway bridge as a case study,the detailed calculation process of yield line theory for guardrail design is introduced.

关 键 词：防撞护栏 屈服线理论 临界长度 横向碰撞力 

分 类 号：U443.7[建筑科学—桥梁与隧道工程]