地震-台风耦合作用下近海导管架平台动力响应分析

金宇航; 闫培雷; 郭恩栋; 吴厚礼; 何润泽; 王晓娜

doi:10.11899/zzfy20220114

地震-台风耦合作用下近海导管架平台动力响应分析

doi: 10.11899/zzfy20220114

中国地震局工程力学研究所, 中国地震局地震工程与工程振动重点实验室, 哈尔滨 150080

基金项目: 中国地震局地震工程与工程振动重点实验室重点专项（2019EEEVL0103-01）

详细信息

作者简介:
金宇航，男，生于1997年。硕士。主要从事生命线工程研究。E-mail：jyuhang824@163.com

通讯作者:
闫培雷，男，生于1982年。副研究员。主要从事地震工程与防灾减灾工程研究。E-mail：yanpeilei325@163.com

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出版历程
- 收稿日期: 2021-03-20
- 网络出版日期: 2022-05-31
- 刊出日期: 2022-03-31

Dynamic Response Analysis of Offshore Jacket Platform under the Coupling Action of the Earthquake and Typhon

Key Laboratory of Earthquake and Engineering Vibration, Institute of Engineering Mechanics, China Earthquake Administration, Harbin 150080, China

摘要

摘要: 针对地震-台风耦合作用下的近海导管架海洋平台，运用Morison方程将台风对导管架平台的拖曳力及波浪对导管架平台的拖曳力和惯性力施加在结构上，并在基底施加地震动，建立地震-台风耦合作用下的运动方程。通过模态分析，确定结构的基本自振频率，进而选取卓越频率与该频率较为接近的海底地震动进行输入。对通过数值模型计算得到的导管架平台动力响应，参考相关文献中的限值，对耦合作用下的平台进行安全评估，给出了近海导管架海洋平台在地震-台风耦合作用下的损伤状态评定标准。本文关于导管架平台动力响应的统计结果，对导管架结构性态设计具有一定参考意义。
- 导管架平台 /
- 多灾耦合 /
- 动力响应 /
- 时程分析 /
- 评估指标
Abstract: In view of offshore jacket platform under the coupling action of earthquake and typhon, the drag force of typhon on the jacket platform and the drag force and inertial force of wave on the jacket platform are applied to the structure through Morison formulation, and the earthquake is applied to the base, establishing the equation of motion under the coupling action of earthquake and typhon. Through modal analysis, the basic natural frequency of the structure is determined, and the submarine ground motion with the dominant frequency close to this frequency is selected for input. For the dynamic response of the jacket platform calculated by the numerical model, the safety assessment of the platform under the coupling effect is carried out with reference to the limit value in the corresponding literature, and the evaluation criteria for damage status of offshore jacket offshore platforms under the coupling action of earthquake and typhoon are given. The statistics of the dynamic response results in this paper also have certain reference significance for the performance-based design of jacket structure.
- Jacket platform /
- Multi disaster coupling /
- Dynamic response /
- Time-history analysis /
- Evaluation index

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图 1 导管架平台

Figure 1. Site photo of jacket platform

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图 2 导管架平台有限元模型

Figure 2. Finite element model of jacket platform

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图 3 应力-塑性应变曲线

Figure 3. Stress-plastic strain curve

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图 4 导管架平台前3阶振型

Figure 4. First three mode shape of jacket platform

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图 5 地震动加速度时程

Figure 5. Acceleration history of earthquake

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图 6 地震动加速度傅里叶谱

Figure 6. Fourier amplitude spectrum of ground motion acceleration

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图 7 不同时间下的波浪形态

Figure 7. Wave patterns at different times

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图 8 各工况下最大应力

Figure 8. Maximum stress of each working condition

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图 10 最大应力位置

Figure 10. Position of maximum stress

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图 11 高度划分

Figure 11. Division of height

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图 12 典型工况应力云图

Figure 12. Stress nephogram of typical working conditions

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图 9 各工况下超指标构件数量

Figure 9. The number of over-indexed components under each working condition

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图 13 导管架平台pushover曲线

Figure 13. Pushover curve of jacket platform

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图 14 各工况下RDA峰值

Figure 14. Maximum RDA of each working condition

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表 1 Q345钢应力-塑性应变参数

Table 1. Stress-plastic strain parameters of Q345

应力/MPa	塑性应变
276.00	0
300.48	1.4e-5
320.16	5.5e-5
333.96	1.24e-4
342.24	2.21e-4
345.00	3.45e-4
345.00	0.01338

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表 2 前8阶自振频率

Table 2. The first 8 order natural frequencies

振型编号	自振频率/Hz
1	2.8018
2	2.8753
3	2.9002
4	3.3711
5	3.4598
6	6.1433
7	6.1440
8	7.0278

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表 3 渤海海域风速

Table 3. Wind speed of Bohai sea

台风名称	风速/m·s⁻¹
布拉万（2012）	20.8
利奇马（2019）	23
巴威（2020）	17.2

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表 4 工况表

Table 4. Table of working conditions

地震动强度/g	风速/m·s⁻¹
地震动强度/g	23	33.6	0
0.1	工况1	工况2	—
0.15	工况3	工况4	—
0.2	工况5	工况6	—
0.4	工况7	工况8	工况9
0	—	工况10	—

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表 5 导管架平台损伤状态

Table 5. Definition of damage state of jacket platform

$ {\rm{RDA}} \leqslant {\rm{RD}}{{{A}}_{{\rm{ud}}}} $	$ {\rm{RD}}{{{A}}_{{\rm{ud}}}}{{ < \rm RDA}} \leqslant {\rm{RD}}{\rm{{A}}_{{\rm{ye}}}} $	$ {\rm{RD}}{{\rm{A}}_{{\rm{ye}}}}{{ < \rm RDA}} \leqslant {\rm{RD}}{{\rm{A}}_{{\rm{ult}}}} $	$ {\rm{RDA > RD}}{{\rm{A}}_{{\rm{ult}}}} $
基本完好	轻微破坏	严重破坏	毁坏

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表 6 各工况下导管架平台损伤状态

Table 6. Damage state of jacket platform under each working condition

工况	1	2	4	6	8
损伤状态	基本完好	轻微破坏	轻微破坏	轻微破坏	严重破坏

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表 7 超指标构件数量统计

Table 7. Statistics on the number of super-index components

工况	导管架帽构件	导管架构件	超指标构件
1	0	0	0
2	5	0	5
4	8	0	8
6	8	2	10
8	8	8	16

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表 8 不同损伤状态下超指标构件占比

Table 8. Proportion of super-index components under different damage states

损伤状态	超指标导管架帽构件比例	超指标导管架构件比例
基本完好	≤0	≤0
轻微破坏	≤1/4	≤1/20
严重破坏	≤1/4	≤1/5

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