南京某高桩码头靠泊能力仿真分析与在线监测预警
Simulation analysis and online monitoring and early warning of berthing capacity of high pile wharf in Nanjing
王承强 1王臣 2梁桂兰 3贾宇 1王恩准1
作者信息
- 1. 南京水利科学研究院,江苏 南京 210029;水灾害防御全国重点实验室,江苏 南京 210029
- 2. 南京水利科学研究院,江苏 南京 210029;河海大学 港口海岸与近海工程学院,江苏 南京 210024;水灾害防御全国重点实验室,江苏 南京 210029
- 3. 河海大学 港口海岸与近海工程学院,江苏 南京 210024;水灾害防御全国重点实验室,江苏 南京 210029
- 折叠
摘要
高桩码头服役环境复杂,码头结构在数十年的运行期内会发生不同程度的损伤,影响码头的安全运营.在码头运行过程中,船舶荷载是高桩码头结构的主要荷载,对码头结构的安全性、耐久性影响较大.本文对南京港某码头靠泊能力进行了有限元仿真分析,提出船舶靠泊过程中的三级安全预警阈值;结合长期在线监测,为码头结构安全服役提供技术支撑.研究结果表明:在船舶撞击1#排架的情况下,船舶撞击力达到238 kN时,码头结构响应达到三级预警指标,码头位移为 3.8 mm,桩基顶部应变为69×10-6;船舶撞击力达到323 kN时,码头结构响应达到二级预警指标,码头位移为 5.1 mm,桩基顶部应变为100×10-6;船舶撞击力达到471 kN,码头结构响应达到一级预警指标码头位移为7.5 mm,桩基顶部应变为156×10-6.在线监测预警结果表明,码头结构具备5 000 吨级船舶靠泊能力,在规范靠泊的前提下,能够满足 8 000 吨级船舶靠泊的结构安全要求.
Abstract
The service environment of high pile wharf is complex,and the wharf structure will be damaged to varying degrees during the operation period of decades,affecting the safe operation of the wharf.During the operation of the wharf,the ship load is the main load of the high-pile wharf structure,which has a great impact on the safety and durability of the wharf structure.In this paper,the berthing capacity of a wharf in Nanjing Port is simulated by finite element method,and the three-level safety early warning threshold in the berthing process of ships is proposed.Combined with long-term online monitoring,it provides technical support for the safe service of the wharf structure.The results show that when the ship hits the 1#rack,the impact force of the ship reaches 238 kN,the wharf structure response reaches the third-level warning index,the wharf displacement is 3.8 mm,and the top strain of the pile foundation is 69×10-6.When the impact force of the ship reaches 323 kN,the wharf structure response reaches the second-level warning index,the wharf displacement is 5.1 mm,and the top of the pile foundation is 100×10-6.The impact force of the ship reaches 471 kN,the wharf structure response reaches the first-level warning index,the dock displacement is 7.5 mm,and the top of the pile foundation is 156×10-6.The online monitoring and early warning results show that the wharf structure has the berthing capacity of 5,000-ton ships,which can meet the structural safety requirements of 8,000-ton ships under the premise of standardized berthing.
关键词
高桩码头/靠泊/动位移/动应变/监测预警/阈值Key words
high pile wharf/berthing/dynamic displacement/dynamic strain/monitoring and early warning/threshold引用本文复制引用
基金项目
国家自然科学基金项目(52109162)
江苏省基础研究计划自然科学基金项目(BK20221192)
出版年
2024
NETL
NSTL
万方数据