基于抗冲击能力分析的公路桥梁混凝土护栏安全性能设计

Safety performance design of highway bridge concrete guardrail based on impact resistance analysis

混凝土护栏为刚性护栏,具有碰撞后变形小、施工便捷、成本低、耐久性高、防护能力突出等优势,在公路桥梁工程中广泛应用,发生交通事故后可有效减少人员伤亡、减少附带损失、降低司乘人员伤害程度。为研究公路桥梁混凝土护栏的安全性能设计问题,基于力学基本原理和功能原理分析了混凝土护栏的抗冲击能力,得到了公路桥梁混凝土护栏抗冲击破坏条件;通过分析抗冲击参数得到护栏安全性能设计的基本原则;基于基本设计原则,得到了构造要求和施工质量控制两方面的安全性能保证措施。建立了公路桥梁混凝土护栏抗冲击能力与安全性能设计之间的关联性,对同类型研究与项目的实施具有一定的参考与借鉴作用。

The concrete guardrail is a rigid guardrail,which has the advantages of small deformation after collision,convenient construction,low cost,high durability and outstanding protection ability.It is widely used in highway and bridge engineering.After traffic accidents,the guardrail can reduce casualties,decrease incidental losses and lower the injury severity of drivers and passengers effectively.In order to study the safety performance design of concrete guardrails in highway bridges,the impact resistance of concrete guardrails was analyzed based on the basic principles of mechanics and functional principles,then the impact damage conditions of concrete guardrails were obtained.So the basic principles of safety performance design of guardrail were obtained by analyzing the impact resistance parameters:Based on the basic design principles,the safety performance assurance measures of structural requirements and construction quality control were obtained.The research results established correlation between the impact resistance and safety performance design of highway bridge concrete guardrail,which has certain reference value for the research of same type project.