既有混凝土桥梁承载能力鉴定标准的研讨

Study of Appraisal Standard for Carrying Capacity of Existing Concrete Bridges

该文借鉴建筑结构鉴定方法及等级评定标准,开展了既有混凝土桥梁承载能力鉴定标准的研究,提出了钢筋混凝土及预应力混凝土公路梁桥承载能力实用鉴定公式,收集了混凝土桥梁承载能力评定的专家意见,推导了承载能力折减系数η与结构抗弯可靠性指标β的关系曲线图,并建议了混凝土梁桥承载能力评定等级标准。

Referencing the appraisal method and grade evaluation standard of building structures,the article puts forward the practical appraisal formula for the carrying capacity of the steel reinforced concrete and pre-stressed concrete highway bridges,collects the experts'opinions in the evaluation of the carrying capacity for the concrete bridges,deduces the relation curve between the reduction coefficient η of carrying capacity and the reliability index β of structure bending resistance,and suggests the appraisal grade standard of carrying capacity for concrete bridges.