摘要
以上海某泖港大桥为工程背景,针对混凝土连续梁悬臂倒拆拆除过程中挂篮吊卸的箱梁节段坠落对主体结构的冲击作用,提出冲击动力可靠度归一化方法。研究箱梁节段突然坠落对主梁结构承载力可靠度的影响,在非线性瞬态研究基础上提出了冲击稳定性动力可靠度概率公式。研究内容及结果对悬臂机械切割倒拆拆除方法具有指导意义。
Based on the engineering background of some Maogang Bridge in Shanghai,aiming at the impact of the falling of the box girder segment unloaded by hanging basket on the main structure during the cantilever reverse demolition of concrete continuous beam,a normalization method of impact dynamic reliability is proposed.In this paper,the influence of the sudden fall of box girder segments on the reliability of the main girder structure is studied.Based on the nonlinear transient research,the probability formula of dynamic reliability for impact stability is proposed.The research contents&results have guiding significance for the demolition method of cantilever mechanical cutting.
作者
闫兴非
张涛
汪罗英
彭俊
YAN Xing-fei;ZHANG Tao;WANG Luo-ying;PENG Jun(Shanghai Urban Construction Design&Research InstituteCo.,Ltd.,Shanghai 200125,China)
出处
《中国市政工程》
2020年第5期103-106,110,122,共6页
China Municipal Engineering
关键词
混凝土连续梁
悬臂倒拆法
冲击效应
动力可靠度
concrete continuous beam
cantilever reverse method
impact effect
dynamic reliability
