To ensure the safety of curved bridges when the customized transport vehicles(CTVs)pass,a safety assessment method for resistant overturning stability was proposed based on forward and inverse reliability analysis.Firstly,considering two limit states which corresponding to conditions that the bridge cannot satisfy the safety redundancy and overturning abrupt,two levels of safety assessment functions were constructed,and the corresponding target reliability index analysis methods of two levels were proposed.Secondly,based on the inverse reliability theory,a two-level resistant overturning stability safety factor calculation model was established.Finally,the stability and safety of the typical three-span continuous curved bridge against overturning was evaluated.The results indicate that the proposed calculation model is reasonable and effective.When a typical three-span continuous curved bridge is equipped with a single support,it meets the safety requirements for anti-overturning,but has low safety reserves.It is recommended to optimize the design of the support form or take anti overturning measures.
关键词
桥梁工程/弯桥/抗倾覆稳定安全评估/大件运输车辆/正、逆可靠度分析
Key words
bridge engineering/curved bridge/resistant overturning stability safety assessment/customized transport vehicles/reliability and inverse reliability analysis
维普
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