纳米流体阻尼器对高桩码头抗震性能的影响

Influence of nanofluidic dampers on seismic performance of pile-supported wharf

为了研究纳米流体材料在降低高桩码头的动力响应、减轻码头震害领域的应用潜力,基于开源有限元计算平台OpenSees,建立了加入阻尼器的高桩码头二维有限元模型,对比分析了传统黏滞阻尼器和纳米流体阻尼器对高桩码头抗震性能的影响,评估了纳米流体材料对高桩码头的减震效果。结果表明:纳米流体阻尼器比黏滞阻尼器具有更好的限制桩顶侧向变形的能力;相比于黏滞阻尼器,纳米流体阻尼器可以更好地降低陆侧桩的桩顶曲率;加入纳米流体阻尼器的码头桩顶耗能小于加入黏滞阻尼器的码头桩顶耗能。

In order to explore the potential applications of nanofluidic materials in attenuating the dynamic response of pile-supported wharves and reducing their damages,this work built a two-dimensional finite element model of a pile-supported wharf with dampers using the open-source finite element platform OpenSees.The study compared the effects of conventional viscous dampers and nanofluidic dampers on the seismic performance of the pile-supported wharf.Results show that nanofluidic dampers have a better ability to limit the lateral deformation on the top of the piles than viscous dampers and are more effective than viscous dampers in reducing the curvature on the top of the land-side piles.The energy dissipation of pile top with nanofluidic dampers is lower than that of pile top with viscous dampers.