摘要
波浪力作用下人工岛岛桥间易出现波能集中和雍水等情况,为了解该区域的力学性能及波浪特性,以深中通道西人工岛岛桥结合部为背景,开展缩尺比为1∶40的岛桥结合部受波浪力作用试验。分析岛桥结合部所受波浪力及波浪特性参数,结合规范公式对波浪特性参数的调整系数进行推导,并对桥梁进行结构优化。结果表明:深中通道西人工岛岛桥结合部最大顶托力、侧向力分别为4126.66 kN、96.54 kN,最大压强为123.72 kPa,与设计值对比,结合部越浪量、波峰面高程、波浪力、最大压强调整系数取值范围分别为1.84~1.95、1.14~1.65、1.64~2.91、1.27~1.42;若采取整体抬高桥梁结构0.5 m的结构优化方案,半封闭区域水动力条件改善明显,越浪量和波浪力均能减少50%以上,建议条件允许时采用该方案。
The junction of an artificial island and a bridge is a critical part that is subjected to wave energy concentration and backwater.With the study case of the junction of the west artificial island and the bridge of Shenzhen-Zhongshan Link,the mechanical properties of artificial island-bridge junction and the characteristics of waves are investigated.A 1∶40 scale model was prepared to test the wave forces on the artificial island-bridge junction,the wave forces and eigen parameters were analyzed,based on the expression given in the code,the adjustment coefficient of the eigen parameters of waves were derived,and the bridge structure was optimized.It is shown that the maximum jacking and lateral forces on the junction of the west artificial island and bridge of Shenzhen-Zhongshan Link are 4126.66 kN and 96.54 kN,respectively,and the maximum pressure reaches 123.72 kPa.Compared with the design values,the parameters should be set within a rational range,including wave overtopping(1.84-1.95),wave crest elevation(1.14-1.65),wave force(1.64-2.91)and maximum pressure adjustment coefficient(1.27-1.42).When the overall bridge was elevated 0.5 m for optimization,the hydrodynamic conditions in the semi-closed region are significantly improved.The water overtopping and wave forces decrease more than 50%.It is recommended to adopt this solution when conditions permit.
作者
戈龙仔
刘高
陈汉宝
GE Long-zai;LIU Gao;CHEN Han-bao(Tianjin Research Institute of Water Transport Engineering,Tianjin 300456,China;National Engineering Research Centre of Port Hydraulic Construction Technology,Tianjin 300456,China;CCCC Highway Bridges National Engineering Research Centre Co.,Ltd.,Beijing 100011,China)
出处
《桥梁建设》
EI
CSCD
北大核心
2023年第2期60-67,共8页
Bridge Construction
基金
国家自然科学基金项目(52001149)
中央级科研院所专项(TKS20210110)。
关键词
跨海大桥
岛桥结合部
波浪特性
波浪力
调整系数
桥梁整体抬高
波浪力作用试验
sea-crossing bridge
island-bridge junction
wave characteristics
wave force
adjustment coefficient
overall lifting of bridge
wave force action test
