大跨度跨海铁路连续刚构桥波浪荷载动力响应研究  

Study on Wave Load Dynamic Response of Long Span Sea Crossing Railway Continuous Rigid Frame Bridge

作　　者：罗浩[1] 甘贤备 晏亮 吕海龙[1] 杨彤麟 郭辉 LUO Hao;GAN Xianbei;YAN Liang;LYU Hailong;YANG Tonglin;GUO Hui(School of Civil Engineering,Hunan University of Science and Technology,Xiangtan Hunan 411201,China;Railway Engineering Research Institute,China Academy of Railway Sciences Corporation Limited,Beijing 100081,China)

机构地区：[1]湖南科技大学土木工程学院,湖南湘潭411201 [2]中国铁道科学研究院集团有限公司铁道建筑研究所,北京100081

出　　处：《铁道建筑》2022年第1期87-91,共5页Railway Engineering

基　　金：湖南省自然科学基金(2021JJ30258、2015JJ3066);国家自然科学基金(51408217)。

摘　　要：运用Reynolds平均法对一座大跨度跨海连续刚构桥的波浪场进行数值模拟,建立波浪-连续刚构桥空间振动的有限单元分析模型,计算波高分别为2、3、4、5、6、8 m时的波浪荷载以及波高为2.4 m时不同周期的波浪荷载作用在桥梁上的动力响应。结果表明:跨中横向位移和墩顶横向位移均随波高的增大而增大,但波高增大到一定值时,跨中横向位移和墩顶横向位移的增幅会减小;跨中横向加速度随波高的增大而增大,但波高增大到一定值时跨中横向加速度的增幅不明显;当波浪周期增加到一定值时桥梁各位置的位移响应增幅也会减小,应综合考虑波浪周期和波高的影响,不能只考虑其中一个因素;波浪荷载对大跨度跨海连续刚构桥横向振动响应的影响较大。The wave field of a long span sea crossing continuous rigid frame bridge was numerically simulated by Reynolds average method,and the finite element analysis model of spatial vibration of wave-continuous rigid frame bridge was established. The wave loads with wave heights of 2,3,4,5,6 and 8 m and the dynamic response of different periods of wave loads on the bridge with wave heights of 2.4 m were calculated. The results show that the midspan and pier top transverse displacements increase with the increase of wave height,but when the wave height increases to a certain value,the increase of mid-span and pier top transverse displacements will decrease. The mid-span transverse acceleration increases with the increase of wave height,but when the wave height increases to a certain value,the increase of mid-span transverse acceleration is not obvious. When the wave period increases to a certain value,the increase of displacement response at each position of the bridge will also decrease. The influence of wave period and wave height should be considered comprehensively,not only one of them. Wave load has a great influence on the transverse vibration response of long span sea crossing continuous rigid frame bridge.

关 键 词：跨海大桥 波浪场 冲击 数值模拟 连续刚构 动力响应 

分 类 号：U448.23[建筑科学—桥梁与隧道工程]