SV波斜入射时不同水体模拟方法下超高水头船闸地震反应分析
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刘力侨(1999-),男,硕士研究生,主要从事港航工程结构仿真研究。E-mail:Llq331977345@163.com。

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国家自然科学基金资助项目(51309037);洞庭湖水环境治理与生态修复湖南省重点实验室开放基金(2018DT04);湖南省水利厅科技项目(20CSLG026);长沙理工大学水利与环境工程学院研究生“双一流”建设项目(2022040201)


Seismic responses of the super-high head ship lock based on different water simulation methods with oblique incidence of SV waves
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    摘要:

    基于黏弹性人工边界的地震动斜入射方法模拟平面SV波不同角度入射情况,分别采用声固耦合法和附加质量法模拟闸室内水体,研究超高水头船闸闸室位移、应力和塑性损伤等地震反应,对比两种水体模拟方法计算结果的异同。结果表明:(1)整体上,两种方法计算得出的左、右闸墙地震反应结果随入射角度变化的规律基本一致;左闸墙受拉损伤的最大值均出现在入射角15°时,右闸墙受拉损伤的最大值均出现在入射角35°时;地震波入射角度对超高水头船闸动力响应影响较大,设计时应考虑地震波斜入射的影响。(2)当入射角较大时,采用声固耦合法计算的闸墙相对位移极值、主应力极值和受拉损伤结果偏保守的概率更大,对超高水头船闸结构设计来说更为安全。(3)建议两种计算方法相互参考和校核,推荐采用偏安全的结果进行超高水头船闸结构设计。

    Abstract:

    The plane SV waves at different angles were simulated based on the input method of obliquely incident ground motion with a viscoelastic artificial boundary. The water inside the lock chamber was simulated using the acoustic-structure coupling and additional mass methods to investigate the seismic responses of the super-high head ship lock, such as displacement, stress, and plastic damage. The similarities and differences in the calculation results of the two methods were compared and analyzed. Results reveal that (1) the variation law of the seismic responses of the left and right lock walls calculated using the two methods with the incident angle is the same. The maximum tensile damage of the left lock wall emerges when the angle of incidence is 15°, and that of the right lock wall appears when the angle of incidence is 35°. The incident angle of a seismic wave has a considerable influence on the dynamic response of super-high head ship locks. Therefore, the design process should consider the influence of the oblique incidence of seismic waves. (2) When the angle of incidence is large, the extreme values of relative displacement and principal stress and the tensile damage results of the lock walls calculated by the acoustic-structure coupling method are relatively larger than the additional mass method, which is safer for the lock design. (3) The two calculation methods are recommended for cross-referencing and calibration, and the safety result is endorsed for the design of super-high head ship locks.

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刘力侨,曹周红,苏颖,李贤,袁澳. SV波斜入射时不同水体模拟方法下超高水头船闸地震反应分析[J].地震工程学报,2024,(2):399-409. LIU Liqiao, CAO Zhouhong, SU Ying, LI Xian, YUAN Ao. Seismic responses of the super-high head ship lock based on different water simulation methods with oblique incidence of SV waves[J]. China Earthquake Engineering Journal,2024,(2):399-409.

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  • 收稿日期:2022-10-27
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  • 在线发布日期: 2024-03-17