長沙南站二期大跨樓蓋人致振動控制研究*
周朝陽1，劉會強2，朱志輝1，周德良3，孫智4，劉君1
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（1 中南大學(xué)土木工程學(xué)院， 長沙 410075； 2 中國汽車工業(yè)工程有限公司， 天津 300113；3 中南建筑設(shè)計院股份有限公司， 武漢 430071； 4 中國建筑第五工程局有限公司， 長沙410075）
［摘要］支座約束對大跨樓蓋振動的影響不可忽略，研究支座對大跨樓蓋振動的影響對樓蓋采取合理有效的減振措施十分重要。通過采用SAP2000軟件對高鐵樞紐長沙南站站房建立整體有限元模型，采用Ritz向量法對結(jié)構(gòu)進行模態(tài)分析，系統(tǒng)地研究了大跨樓蓋的豎向振動響應(yīng)。通過時程分析法和多點輸入對兩跨支座約束不同的大跨樓蓋進行了振動舒適度分析。根據(jù)不同大跨樓蓋的振動特性，分別提出了調(diào)諧質(zhì)量阻尼器（TMD）的減振設(shè)計方法。分析及現(xiàn)場實測結(jié)果表明，跨度及結(jié)構(gòu)形式相同而支座約束不同的大跨樓蓋的振動響應(yīng)有差距，分別采取減振措施后，減振效果非常明顯。［關(guān)鍵詞］長沙南站; 支座約束; 大跨樓蓋; 調(diào)諧質(zhì)量阻尼器; 振動控制; 現(xiàn)場實測中圖分類號：TU248.1 文獻標(biāo)識碼：A 文章編號：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
*長江學(xué)者和創(chuàng)新團隊發(fā)展計劃（IRT1296），國家自然科學(xué)基金資助項目(51378511，50808177)。作者簡介：周朝陽，博士，教授，博士生導(dǎo)師，Email: cyzhou@csu.edu.cn。
