港珠澳大桥隔震梁桥海流涡激力特性的数值模拟  

A numerical simulation study on ocean current induced vortex-excitation property for Hong Kong-Zhuhai-Macao Base Isolation Bridge in Abyssal Zone

作　　者：陈洋洋[1] 谭平[1] 崔杰[1] 黎建峰[2] 周福霖[1] 

机构地区：[1]广州大学减震控制与结构安全国家重点实验室(培育),广东广州510405 [2]中山大学力学系,广东广州510275

出　　处：《广州大学学报（自然科学版）》2016年第1期36-44,共9页Journal of Guangzhou University:Natural Science Edition

基　　金："973"国家重点基础研究发展计划资助项目(2011CB013606);"十二五"国家科技支撑计划资助项目(2012BAJ07B02);国家自然科学基金资助项目(11102045;U1334209)

摘　　要：采用隔震设计的近海长周期结构,有必要明确其下部结构在可能的海流极端作用下的涡激力周期、幅值等特性参数,以供整体结构动力分析参考.文章对港珠澳大桥隔震连续梁桥深水区典型单墩及其基础的三维绕流场进行数值模拟,考察了低桩承台方案在海床面位于承台顶(设计工况)、海床面位于承台底、海床冲刷演变至淤泥层全部消失的极端情形等3种典型工况下的绕流场特性,给出墩身受到的潜在涡激力的动力参数以供设计参考.It is significant to verify the substructural vortex-excitation properties for the base isolated offshore long-period structure. A numerical simulation study on vortex-excitation property for the substructure of Hong Kong-Zhuhai-Macao Base Isolation Bridge in Abyssal Zone is thus presented. The typical cases for the pile cap, which are submerged, emerged low-rise, and high-rise designs, are studied in details for the project. The vortex-excitation properties under different cases are summarized for project design reference.

关 键 词：近海桥梁 海流 涡激力 下部结构 隔震 

分 类 号：P315.9[天文地球—地震学]