| 摘要: |
| 高烈度区内河码头的抗震安全直接关系区域交通基础设施的可靠性与韧性。以白鹤滩库区东川港格勒中心作业区高桩框架式货运码头为研究对象,利用OpenSees软件建立考虑土-桩-结构相互作用的三维有限元模型。结合场地地震安全性评价结果,采用耐震时程法生成符合局部场地特征的地震动输入,开展非线性动力时程分析。依据码头结构特点及国内外相关抗震设计规范,确定关键工程需求参数及其量化标准,构建多水准抗震性能评价体系。通过量化结构在不同地震强度下的损伤概率,建立地震易损性曲线,实现对多遇、设防及罕遇地震下损伤状态的概率化评估。结果表明：耐震时程法能有效揭示高桩框架式码头在不同强度地震作用下的动力反应特征；该码头满足“小震不坏、中震可修、大震不倒”的抗震设防要求,具备良好的抗震性能。研究成果可为类似内河码头结构的抗震设计与安全评估提供科学依据和技术支持。 |
| 关键词: 高桩框架式码头 耐震时程法 地震易损性 非线性动力分析 土-桩-结构相互作用 |
| DOI： |
| 分类号:TU375 |
| 基金项目:国家自然科学基金面上项目（51878605） |
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| Seismic fragility analysis of high-piled frame freight wharf in inland rivers of high intensity areas |
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YU Linjiang1, TANG Minggang1, WANG Peiyin1, HUANG Xishuang1, WEI Lingxin2, FANG Huolang2
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1.The Third Engineering Company of CCCC Fourth Harbor Engineering Co,Ltd,Guangdong Zhanjiang;2.College of Civil Engineering and Architecture,Zhejiang University,Zhejiang Hangzhou
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| Abstract: |
| The seismic safety of inland river wharfs in high-intensity zones is directly related to the reliability and resilience of regional transportation infrastructure. Taking the high-piled frame freight wharf in the Gele Operation Area of Dongchuan Port in the Baihetan Reservoir as the research subject, a three-dimensional finite element model considering soil-pile-structure interaction is established using OpenSees software. Based on the seismic safety assessment results of the site, the endurance time method for seismic resistance is employed to generate ground motion inputs consistent with local site characteristics, followed by nonlinear dynamic time-history analyses. According to the structural features of the wharf and relevant seismic design codes both domestically and internationally, key engineering demand parameters and their quantitative standards are determined, establishing a multi-level seismic performance evaluation system. By quantifying the damage probability of the structure under different seismic intensities, seismic fragility curves are constructed to achieve probabilistic assessment of damage states under frequent, fortified, and rare earthquakes. The results indicate that the endurance time method for seismic resistance effectively reveals the dynamic response characteristics of high-piled frame wharf under earthquakes of varying intensities. The wharf meets the seismic design requirements of "no damage under minor earthquakes, repairable under moderate earthquakes, and no collapse under major earthquakes," demonstrating good seismic performance. The research findings provide a scientific basis and technical support for the seismic design and safety assessment of similar inland river wharfs. |
| Key words: high-piled frame wharf seismic fragility endurance time method nonlinear dynamic analysis soil-pile-structure interaction |
