引用本文:冯云芬,高树飞.基于位移的高桩码头地震易损性分析[J].水利水运工程学报,2019,(3):76-84
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基于位移的高桩码头地震易损性分析
冯云芬, 高树飞
聊城大学建筑工程学院,山东聊城
摘要:
鉴于目前高桩码头的地震易损性分析很少将码头的总位移作为性能指标,分别根据云图法和条带法建立了基于位移的码头地震易损性分析方法。该方法考虑地震动的不确定性,并基于桩身材料应变限值定义了码头的破坏状态。为了说明这种分析方法,采用80条地震动记录对一高桩码头案例分别进行了云图法和条带法分析,比较了两种方法建立的易损性曲线的差别,分析了位移能力不确定性对易损性曲线的影响。结果表明,由云图法和条带法建立的码头易损性曲线之间的差别较小,可以忽略,但考虑到云图法的计算量较小,建议在码头易损性分析中采用云图法;位移能力不确定性对于易损性曲线的影响较大,分析中不可忽略,应予以考虑。
关键词:  高桩码头  地震易损性分析  云图法  条带法  能力不确定性
DOI:
分类号:U656.1+13
基金项目:山东省自然科学基金资助项目(ZR2018BEE046);聊城大学博士科研启动基金(318051702, 318051533)
Seismic vulnerability analysis of pile-supported wharves based on displacement
FENG Yunfen, GAO Shufei
School of Architecture and Civil Engineering, Liaocheng University, Liaocheng
Abstract:
In view of the fact that the total displacement of the wharf is seldom used as a performance index in the seismic vulnerability analysis of the pile-supported wharf at present, a displacement-based vulnerability analysis method is proposed based on the cloud map method and stripe method respectively. The proposed method takes into account the uncertainty of earthquake ground motion and defines the failure status of the pile-supported wharf based on the strain limits of pile material. In order to illustrate this analysis method, 80 earthquake records are used to analyze the vulnerability curves of the pile-supported wharf by using the cloud map method and stripe method respectively. The differences between the vulnerability curves given by two methods are compared, and the influences from the uncertainty of displacement capacity on the vulnerability curves are analyzed. The analysis results show that there is little difference between the vulnerability curves of wharves established by the cloud map method and the stripe method, which can be neglected. However, considering the small amount of calculation of the cloud map method, it is suggested to use the cloud map method in the vulnerability analysis of wharves. The uncertainty of displacement capacity plays an important role in the analysis of the vulnerability curves, and should not be neglected in the analysis and should be taken into account.
Key words:  Pile-supported wharves  seismic vulnerability analysis  cloud map method  stripe method  displacement capacity uncertainty
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