跨海桥梁承台波流力计算方法与合成系数研究及应用  

Study of Calculation Methods and Composite Coefficient of Wave-Current Forces for Sea-Crossing Bridge Pile Caps and Implementation

作　　者：梅大鹏[1,2] 刘清君[2] 胡勇[2] 王登婷[3] MEI Da-peng LIU Qing-jun HU Yong WANG Deng-ting(School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China China Railway Major Bridge Reconnaissance b- Design Institute Co., Ltd., Wuhan 430050, China Nanjing Hydraulic Research Institute, Nanjing 210024, China)

机构地区：[1]西南交通大学土木工程学院,四川成都610031 [2]中铁大桥勘测设计院集团有限公司,湖北武汉430050 [3]南京水利科学研究院,江苏南京210024

出　　处：《世界桥梁》2017年第1期51-55,共5页World Bridges

基　　金：中国工程院重点咨询研究项目(2016-XZ-13)

摘　　要：为研究跨海桥梁承台波流力计算方法与合成系数取值的适用性,给跨海桥梁承台波流力计算提供指导,基于承台波浪力和水流力计算理论,以平潭海峡公铁大桥SR54号桥墩为研究对象,通过物理模型试验,得到承台波流力与波浪力、水流力之和的比值(合成系数)。试验结果表明:对于桥梁基础承台波流力最大值可简化地取波浪力最大值与水流力最大值之和的1.04(合成系数)倍,在计算时可忽略桥墩和桩基的影响。将该方法应用于港珠澳大桥、平潭海峡公铁大桥以及某输变电工程电塔基础承台结构波流力计算,结果表明采用该方法的波流力计算值与模型试验值符合较好,具有较高的精度,可推广应用于同类跨海桥梁承台波流力计算。To study the applicability of the methods to calculate the wave-current forces and the composite coefficients of pile caps of sea-crossing bridge and to provide references for the calculation of wave-current forces of pile caps of sea-crossing bridge,the pier SR54 of Pingtan Straits Rail-cum-Road Bridge was taken as the example in this study.Based on the calculation theories of the wave and hydrodynamic forces of the pile caps,the ratio of wave-current force and the sum of wave and hydrodynamic forces,namely composite coefficient,was gained by the physical model tests.The results of the tests show that the maximum value of the wave current force of the bridge pile caps can be simplified to the 1.04（composite coefficient）times of the sum of the maximum wave force and hydrodynamic force and the influence of the pier and the piles can be ignored during the calculation.The method has already been used to the Hongkong-Zhuhai-Macao Bridge,Pingtan Straits Rail-cum-Road Bridge and a power transmission project,for the calculation of the wave current forces of the pile caps.The results indicate that the calculated wave current forces gained by this method agree well with the model testing values,which have high precision and can be used to the wave force calculation of pile caps of sea-crossing bridges of the same type.

关 键 词：跨海桥梁 桥梁基础 承台 波流力 物理模型试验 合成系数 计算方法 

分 类 号：U442[建筑科学—桥梁与隧道工程]