摘要
为研究全直钢管桩码头的损伤演化规律,采用欧进萍地震损伤模型量化码头钢管桩的损伤程度,通过ABAQUS有限元软件建立码头排架结构的计算模型,分析结构在地震作用下的动力时程响应,研究码头桩基随地震时程、地震动强度的损伤演化规律。结果表明,码头各桩损伤发展主要发生在地震响应剧烈的时期,桩顶是塑性发展区域,桩基反复进入塑性状态,导致结构逐步破坏;桩基损伤值由位移项和能量项构成,位移项前期贡献较大,能量项后期贡献较大,位移损伤的占比要高于耗能损伤;各桩损伤值随地震动强度的增大呈上升趋势,由海侧向陆侧桩基的损伤逐渐增大,陆侧桩承担更大的水平地震力,是耗散地震能量的主要构件。
In order to study the evolution law of structural damage of all-vertical-piled wharf with steel pipe piles,we quantify the damage degree of wharf steel pipe pile by Ou Jinping seismic damage model,establish the calculation model of the wharf bent structure by ABAQUS finite element software to analyze the dynamic time-history response of the structure during seismic,and study the damage evolution law of the wharf piles with the seismic time-history and seismic intensity.The results show that the damage accumulation of pile mainly occurs in the period when seismic response changes dramatically and plastic damage occurs mainly at the top of each pile.Pile foundation enters plasticity repeatedly under strong seismic excitation,which leads to the gradual destruction of the structure.Damage value of pile is composed of displacement term and energy term.The former takes control action at the early stage while the latter contributes more at the later stage,and the proportion of displacement damage is higher than that of energy dissipation damage.Damage value of each pile presents an upward trend with the increase of seismic intensity.The damage distribution of pile foundation gradually increases from the sea side to the land side,and the land-side pile undertakes larger horizontal seismic force,which is also the main component of dissipating seismic energy.
作者
钱金炜
陶桂兰
陈晓军
QIAN Jin-wei;TAO Gui-lan;CHEN Xiao-jun(College of Harbor,Coastal and Offshore Engineering,Hohai University,Nanjing 210098,China)
出处
《水运工程》
北大核心
2020年第1期29-34,117,共7页
Port & Waterway Engineering
基金
江苏省基自然科学基金项目(BK20151498)
关键词
码头结构
钢管桩
损伤模型
损伤演化规律
wharf structure
steel pipe pile
damage model
damage evolution law
