长沙南站二期大跨楼盖人致振动控制研究*
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（1 中南大学土木工程学院， 长沙 410075； 2 中国汽车工业工程有限公司， 天津 300113；3 中南建筑设计院股份有限公司， 武汉 430071； 4 中国建筑第五工程局有限公司， 长沙410075）
［摘要］支座约束对大跨楼盖振动的影响不可忽略，研究支座对大跨楼盖振动的影响对楼盖采取合理有效的减振措施十分重要。通过采用SAP2000软件对高铁枢纽长沙南站站房建立整体有限元模型，采用Ritz向量法对结构进行模态分析，系统地研究了大跨楼盖的竖向振动响应。通过时程分析法和多点输入对两跨支座约束不同的大跨楼盖进行了振动舒适度分析。根据不同大跨楼盖的振动特性，分别提出了调谐质量阻尼器（TMD）的减振设计方法。分析及现场实测结果表明，跨度及结构形式相同而支座约束不同的大跨楼盖的振动响应有差距，分别采取减振措施后，减振效果非常明显。［关键词］长沙南站; 支座约束; 大跨楼盖; 调谐质量阻尼器; 振动控制; 现场实测中图分类号：TU248.1 文献标识码：A 文章编号：1002-848X(2015)19-0022-04
Human-reduced vibration control study of large-span floor of the second phase project of Changsha South Railway StationZhou Chaoyang1, Liu Huiqiang2, Zhu Zhihui1, Zhou Deliang3, Sun Zhi4, Liu Jun1
(1 School of Civil Engineering, Central South University, Changsha 410075, China; 2 Automotive Engineering Corporation, Tianjin 300113, China; 3 Central-South Architectural Design Institute Co., Ltd., Wuhan 430071, China; 4 China Construcion Fifth Engineering Division Corp., Ltd., Changsha 410075, China)Abstract: Constraint of support has obvious influence on the vibration of large-span floor, thus it is of great importance to analyze the support influence on large-span floor and take effective vibration reduction measures. Vertical vibration response of the large-span floor of Changsha South Railway Station as a high-speed railway hub was calculated according to an overall finite element model by SAP2000 software and the modal analysis of the structure by Ritz vector method. Analysis of comfort level of vibration was carried out on two large-span floors with different support constraints by time-history analysis method and multipoint input method. Tuned mass damper (TMD) was designed to reduce the vibration according to the vibration characteristics of different large-span floors. Numerical analysis and field measurement results show that the vibration responses of large-span floors with the same span, same structural form and different support constraints are different, and obvious vibration reduction effect is observed after applying vibration reduction measures.Keywords: Changsha South Railway Station; constraint of support; large-span floor; tuned mass damper; vibration control; field measurement
*长江学者和创新团队发展计划（IRT1296），国家自然科学基金资助项目(51378511，50808177)。作者简介：周朝阳，博士，教授，博士生导师，Email: cyzhou@csu.edu.cn。
