考虑流固耦合作用屋顶游泳池减振效应研究  

RESEARCH ON VIBRATION REDUCTION EFFECT OF ROOFTOP SWIMMING POOL CONSIDERING FLUID-STRUCTURE COUPLING

作　　者：金波 郭荣 方棋洪[3] JIN Bo;GUO Rong;FANG Qi-hong(Key Laboratory of Damage Diagnosis of Engineering Structures of Hu’nan Province,College of Civil Engineering,Hu’nan University,Changsha 410082,China;Hu’nan Huda Construction Supervision Co.,Ltd,Changsha 410082,China;College of Mechanical and Vehicle Engineering,Hu’nan University,Changsha 410082,China)

机构地区：[1]湖南大学土木工程学院,工程结构损伤诊断湖南省重点实验室,长沙410082 [2]湖南湖大建设监理有限公司,长沙410082 [3]湖南大学机械与运载工程学院,长沙410082

出　　处：《工程力学》2023年第8期138-148,共11页Engineering Mechanics

基　　金：国家自然科学基金项目(11772122)。

摘　　要：某结构计划在屋顶设计标准游泳池,游泳池下部为一大跨度多功能会议室,对其进行抗振性能研究成为设计方案能否实施的关键。该文将屋顶游泳池视为调谐液体阻尼器(TLD)装置,基于位移-压力格式有限元方法,给出了TLD-结构体系流固耦合运动方程。应用ABAQUS软件建立了流固耦合实体模型,并基于TLD等效非线性调谐质量阻尼器(TMD)理论,在SAUSAGE中建立了等效调谐质量(等效TMD)模型。研究了地震荷载作用下屋顶游泳池对结构抗振性能的影响,分析了流固耦合作用的减振效率。研究结果表明:流固耦合运动方程求解与ABAQUS软件数值模拟的位移与加速度时程曲线具有较好的一致性,验证了流固耦合运动方程的准确性;大跨屋顶标准游泳池对结构在X与Y方向的地震响应均有明显的抑制作用,结构的第一阶模态振动减振效果要优于第二阶模态;流固耦合模型在地震作用下的楼层位移与基底减振率相较于不考虑流固耦合作用的等效调谐质量模型有明显提高,在设计屋顶游泳池时应充分考虑流固耦合作用的影响。A standard swimming pool is planned to be designed on the roof of a building,and a large-span multifunctional conference room is located at the lower part of the swimming pool.The study of its anti-vibration performance has become the key to whether the design scheme can be implemented or not.The rooftop swimming pool is regarded as a tuned liquid damper(TLD)device.Based on the displacement-pressure finite element method,the fluid-structure coupling motion equation of TLD structure system is obtained.The solid model of fluid-structure coupling is established using ABAQUS software,and the equivalent tuned mass damper(equivalent TMD)model is established in SAUSAGE based on the TLD equivalent nonlinear tuned mass damper(TMD)theory.The influence of roof swimming pool on structural vibration resistance under seismic load is studied,and the vibration reduction efficiency of fluid-structure coupling is analyzed.The results show that the solution of the fluid-structure coupling motion equation is in good agreement with the displacement and acceleration time history curves obtained by numerical simulation using ABAQUS,thus the accuracy of the fluidstructure coupling motion equation is verified;The large-span roof standard swimming pool has obvious inhibitory effect on seismic response of the structure in X and Y directions,and the vibration damping effect of the first mode of the structure is better than that of the second mode;Compared with the equivalent TMD model without considering the fluid-structure coupling,the floor displacement and base vibration reduction rate of the fluid-structure coupling model under earthquake are significantly improved.The effect of fluid-structure coupling should be considered in the design of roof swimming pool.

关 键 词：结构振动控制 流固耦合 位移-压力格式 调谐液体阻尼器 屋顶游泳池 

分 类 号：TU311.3[建筑科学—结构工程]