【摘要】 由于使用、超载、环境作用以及功能退化等人为或自然因素,导致公路桥梁在服役期间发生各种结构损伤,如何对其进行评估已成为世界各国桥梁工程界研究的热点问题之一。本文在已有研究成果的基础上,从规范评估方法、承载力可靠度和疲劳可靠度、系统可靠度以及整体结构评估等方面,对既有公路桥梁评估的研究现状进行了总结与阐述,并指出了既有公路桥梁评估领域存在的问题以及研究方向。更多还原

【Abstract】 Different structural damages arise in the service of freeway bridges due to human factor or natural factor such as serviceability,overload,environmental effect and function degradation etc..Hence assessment of existing freeway bridges is one of vital importance in the field of the world bridge engineering.Based on the investigation of the assessment methods of existing freeway bridges,the state of the art of the assessment methods are summarized including specification assessment method,loading capacity reliability,fatigue reliability,system reliability and the whole structure assessment.The existing problems and study directions of existing freeway bridges assessment are suggested.更多还原