全直桩码头结构振型反应谱抗震分析

发布时间：2018-01-29 00:29

本文关键词： 全直桩码头振型分解反应谱法平动扭转耦联效应抗震设计　出处：《水运工程》2017年01期 　论文类型：期刊论文

【摘要】：针对全直桩码头结构形式,以国外某码头工程为研究对象,采用振型分解反应谱法对不同水平地震方向激励进行纵横轴不对称结构动力响应分析,探讨了在不同水平地震方向作用下桩基结构位移和内力的变化规律。计算结果表明:结构平面质量中心和刚度中心不重合时,水平扭转效应对结构受力影响明显,结构地震作用及其扭转耦联振动效应可采用振型分解反应谱法计算;在水平地震作用下,全直桩码头结构的近陆侧桩承担的水平地震力最大,边桩比中间桩群承担了更多的水平地震力,设计中应重视边角桩的受力情况及调整桩基布置形式来减小扭转产生的不利影响。
[Abstract]:Aiming at the structure form of the whole vertical pile wharf, taking a wharf project abroad as the research object, the dynamic response analysis of asymmetric structure of longitudinal and horizontal axis is carried out by using the mode decomposition response spectrum method in different horizontal seismic directions. The variation law of displacement and internal force of pile foundation under the action of different horizontal earthquake direction is discussed. The results show that the center of mass and the center of stiffness of the structure do not coincide. The horizontal torsion effect has obvious influence on the stress of the structure. The seismic action of the structure and its torsional coupling vibration effect can be calculated by the mode decomposition response spectrum method. Under the action of horizontal earthquake, the horizontal seismic force of the near-land side pile of the whole vertical pile wharf structure is the largest, and the lateral pile bears more horizontal earthquake force than the middle pile group. In order to reduce the adverse effect of torsion, the stress of side pile and the arrangement of pile foundation should be emphasized in the design.
【作者单位】：中交第四航务工程勘察设计院有限公司;
【分类号】：U656.11
【正文快照】： 高桩码头结构刚度小,常采用斜桩提高水平刚度,抵抗由船舶或地震产生的水平荷载,但在国内外历次震害调查发现,大量斜桩遭受地震破坏[1]。全直桩码头结构柔度大、延性好,强震作用下结构的水平侧移大,增大结构的振动周期,进而更好地吸收地震能量,但在地震作用下结构的抗震性能目

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