摘要
为了研究上部起重机对下部码头结构抗震性能的影响,基于所建立的起重机-码头整体结构的三维有限元模型,研究了不同峰值加速度以及近远场等不同地震动作用下结构的动力响应特征,分析了不同地震动作用下起重机的动力响应对下部码头结构动力特性的影响。研究表明:起重机对高桩码头结构的自振特性影响较大,使整体结构周期变长;考虑起重机时,码头桩顶弯矩极值大幅下降、剪力极值大幅下降的同时,其出现的位置也产生了明显的下移,进而将改变码头结构整体的破坏机制;近场地震动对结构的动力响应影响最大,对其弹塑性极限状态起控制作用。
To study the effect of the container crane to the seismic performance of the wharf structure, we study the dynamic response characteristics of the wharf structure under the seismic actions of different peak accelerations and near-field and far-field ground motions based on the 3D finite element model of crane-wharf structure. The effects of the dynamic response of container crane to the wharf structure dynamic characteristics under different seismic actions are analyzed. The study shows that the container crane has a significant impact on the natural vibration characteristics of the pile-supported wharf structure, making the period of the structure extended. Considering the container crane, the moment extremum of the pile-top gets decreased significantly. With the decrease of the shear force extremum, the position where the extreme value occurs gets down obviously. These will change the failure mechanism of the wharf structure. The near-field earthquake has the most significant impact on the structural dynamic response, which will be the main controlling factor of the elastic-plastic limit state.
出处
《水运工程》
北大核心
2016年第2期39-47,共9页
Port & Waterway Engineering
基金
国家自然科学基金资助项目(51178045)
教育部海外名师资助项目(MS2011BJKJ005)
关键词
起重机
高桩码头
近远场地震
地震响应
动力特性
container crane
pile-supported wharf
near-field and far-field ground motion
seismic response
dynamic characteristics
