Assessment of existing steel railway bridges

详细信息    查看全文

• 作者：Ozden Caglayan^a ; Kadir Ozakgul ;   ; ^a ;   ; ^{ozakgulk@itu.edu.tr} ; Ovunc Tezer^a
• 关键词：Rating factor ; Safety index ; System reliability ; Steel railway bridge ; Dynamic test
• 刊名：Journal of Constructional Steel Research
• 出版年：2012
• 出版时间：February 2012
• 年：2012
• 卷：69
• 期：1
• 页码：54-63
• 全文大小：2391 K

文摘

A series of dynamic tests, acceleration measurements, evaluation, finite element model simulations and safety index calculations were performed on existing steel railway bridges giving service on railway network. Dynamic tests were fulfilled by using a special test train on these bridges to obtain the dynamic parameters and these parameters were then used to refine the finite element models of the bridges. Once the models have been updated to represent the actual condition, safety indices were calculated for structural components of the bridges for each proposed loading condition. These safety indices were used to calculate failure probabilities of structural members. As the final step, system reliability of the bridges was evaluated based on proposed system models of the bridges. It is believed that this study will provide a reliable background for proposed heavier axle loads resulting from new freight trains by realizing the current condition of bridge structures.