摘要
高桩码头服役环境复杂,船舶与门机等可变荷载作用下结构变位安全问题突出。然而,高桩码头通常不具备参照基准,且在离岸严苛条件下服役是常态,动态位移监测成为挑战。采用码头无基准动态位移监测技术,对江苏某高桩码头进行实时位移监测。详细分析门机作业和船舶撞击条件下码头位移响应规律,基于码头适用性、安全性提出该码头的两级预警指标。结合数值仿真计算,提出该码头不同吨级船舶靠泊建议。研究表明:门机的作业位置是影响码头位移响应大小的直接因素。码头第一结构段在船舶撞击作用下,因引桥等边界条件的影响,导致A_(2)监测点的位移响应在X、Y方向上均较大。一级预警指标由码头主要荷载作用组合的最大值推算,位移响应值为15.39 mm。二级预警指标由混凝土抗拉极限应力值为评判标准,位移响应值为19.14 mm。相应地,1万吨级船舶靠泊时法向速度不应超过0.19 m/s, 5 000吨级船舶靠泊时法向速度不应超过0.22 m/s。
The service environment of high-pile terminals is complex,and the safety problem of structural displacement under variable loads such as ships and portal cranes is prominent.However,dynamic displacement monitoring is a challenge when high-pile terminals often do not have a reference frame and service is the norm in harsh offshore conditions.In this paper,the dynamic displacement monitoring technology without reference is used to monitor the real-time displacement of a high-pile terminal in Jiangsu.The displacement response law of the terminal under the condition of portal crane operation and ship impact is analyzed in detail,and a two-level early warning index of the terminal is proposed based on the applicability and safety of the terminal.Combined with numerical simulation calculation,the berthing suggestions of ships of different tonnage of the terminal are proposed.It is concluded that the operating position of the portal crane is a direct factor affecting the displacement response of the terminal.Under the influence of ship impact,the displacement response of A 2 monitoring point is large in the X and Y directions due to the influence of boundary conditions such as approach bridges.The first-level early warning index is calculated from the maximum value of the main load action combination of the terminal,and the displacement response value is 15.39 mm;The secondary warning index is judged by the tensile limit stress value of concrete,and the displacement response value is 19.14 mm.The normal speed of 10,000-ton ships should not exceed 0.19 m s when berthing,and the normal speed of 5,000-ton ships should not exceed 0.22 m s when berthing.
作者
王承强
贾宇
王臣
王恩准
刘志浩
WANG Chengqiang;JIA Yu;WANG Chen;WANG Enzhun;LIU Zhihao(Nanjing Hydraulic Research Institute,Nanjing 210029,China;College of Harbor,Coastal and Offshore Engineering,Hohai University,Nanjing 210098,China;State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering,Nanjing 210029,China)
出处
《水运工程》
2024年第2期35-42,48,共9页
Port & Waterway Engineering
基金
江苏省基础研究计划自然科学基金项目(BK20221192)。
关键词
高桩码头
动态位移
船舶撞击
门机荷载
安全预警
high pile wharf
dynamic displacement
ship impact
portal crane load
safety warning
