【摘要】 根据随机振动原理,对某特大型桥梁6号钢吊箱进行随机动力响应分析;通过对比静、动力分析的结果,总结波浪荷载作用下钢吊箱的受力特性。研究结果表明,钢吊箱考虑附连水质量时,结构自振频率降低,但其动力响应并不大,建议设计吊箱时根据结构的安全性要求,乘以1.1~1.3的安全系数。更多还原

【Abstract】 Based on the theory of stochastic vibration,random dynamic analysis of No.6 steel suspended cofferdam of a super large bridge was carried out.The mechanical characteristics of steel suspended cofferdam under wave load actions were studied by comparing the results of static and dynamic analysis.Analysis results show that the natural frequencies of steel suspended cofferdam structure decrease when additional water mass is considered,dynamic responses of the structure are not intense.It is suggested that a safety factor of 1.1~1.3 should be multiplied in structure design according to safety requirement of steel suspended cofferdam.更多还原