Seismic Performance and Ice-Induced Vibration Control of Offshore Platform Structures Based on the ISO-PFD-SMA Brace System

Seismic Performance and Ice-Induced Vibration Control of Offshore Platform Structures Based on the ISO-PFD-SMA Brace System
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基于ISO-PFD-SMA支撑系统的海洋平台结构抗震性能及冰激振动控制

DOI:
10.1155/2017/3596094
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发表时间:
2017
影响因子:
--
通讯作者:
Rashidi Maria
Rashidi Maria
中科院分区:
材料科学4区
文献类型:
--
作者:
Zhang Jigang;Ma Zhehao;Liu Feifei;Zhang Chunwei;Sharafi Pezhman;Rashidi Maria

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Pall型摩擦阻尼器(PFD)具有较高的耗能能力,而形状记忆合金(SMA)具有优良的超弹性性能。因此,将PFD和SMA结合作为支撑系统在结构振动控制中具有广阔的前景。本文研究了SMA支撑系统、ISO-SMA(ISO表示隔震)支撑系统和ISO-PFD-SMA支撑系统三种结构形式的海洋平台在地震和冰激激励下的性能。本文在地震和冰荷载作用下,将PFD-SMA支撑系统安装在导管架平台的隔震层上。利用ANSYS软件对减振效果进行了评价。结果表明,PFD-SMA支撑体系能够有效地降低海洋平台结构的地震反应和冰激反应,同时具有良好的耗能和滞回性能。
Pall-typed frictional damper (PFD) has higher capacity of energy dissipation, whereas shape memory alloy (SMA) has excellent superelastic performance. Therefore, combining PFD and SMA together as a brace system has a great prospect in vibration control of structures. This paper investigates the performance of offshore platform with three structural configurations including the SMA brace system, the ISO-SMA (where ISO stands for isolation) brace system, and the ISO-PFD-SMA brace system, which are subjected to seismic and ice-induced excitations. In this study, PFD-SMA brace system is installed on the isolation layer of jacket platform, which is under earthquake excitations and ice loading. Then, the reduction of vibration is evaluated by using ANSYS program. The results show that the PFD-SMA brace system is useful in reducing the seismic response and ice-induced response of offshore platform structures; meanwhile, it also demonstrates excellent energy dissipation and hysteretic behavior.
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