波浪荷载作用下施工平台随机动力响应分析  

Random Dynamic Response Analysis on Construction Platform Based on Wave Force

作　　者：周丹[1] 肖盛燮[1] 杜逢彬 

机构地区：[1]重庆交通大学土木建筑工程学院,重庆400074 [2]重庆勘察院,重庆400020

出　　处：《重庆交通大学学报（自然科学版）》2008年第3期370-373,412,共5页Journal of Chongqing Jiaotong University(Natural Science)

基　　金：“西部开发科技行动”重大项目(2004BA901A02)

摘　　要：以青岛海湾大桥海上施工平台为背景,采用有限元分析程序提取了平台的各阶自振频率。对随机波浪作用下考虑不同激励方向的动力响应进行计算,并分析了不同激励方向对结构随机响应的影响,得出波浪荷载以45°方向激励时,结构以扭转为主的振型得到发挥,动力响应出现两次峰值。通过施工平台静、动力计算结果的比较,建议在施工平台的设计时,应充分考虑到波浪力的动力效应。According to the construction platform of Qingdao Gulf Bridge, finite element programming was used in different frequencies. The calculated dynamic responses was considered to be the excitation from various directions in the action of irregular wave force. The influence of the excitation from various directions on the random dynamic response was analyzed. The results show that the main mode shape of twist is played when excited from 45^o direction. Dynamic response experiences two peaks. The calculation results of static and dynamic were compared. The results show that the dynamic influence of the wave force should be considered during designing construction platform.

关 键 词：施工平台 波浪力 激励 不同角度 功率谱密度 

分 类 号：TU352[建筑科学—结构工程]