基于场景模拟的桥面吊机坠落定量风险评估

摘要

Targeted at the risk of crane falling form deck gider during the construction of Chongqing Dongshuimen Yangtze River Bridge, the finite element time-history method has been used to calculate the degree of structural damage based on the risk scenario simulation, and the "equivalent method" was introduced for quantitative assessment of risk losses. According to the results of risk assessment and the probability of risk obtained from expert investigation, the risk rating was confirmed and the corresponding prevention and control measures and contingency plans are put forward so as to provide reference and ideas for the quantitative risk assessment of bridge projects.%以重庆东水门长江大桥施工期间桥面架梁吊机倾覆坠落这一假设风险事态为研究对象,基于风险场景模拟,采用结构有限元时程分析方法计算结构损伤程度,并引入"当量法"对风险损失进行定量评估.根据风险损失定量评估结果和专家调查法得到的风险概率确认风险评级,并提出相应的防控措施和应急预案,以期为桥梁工程定量风险评估研究提供参考和思路.