- 摘 要
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（1 天津大學(xué)建筑工程學(xué)院， 天津 300072； 2 天津大學(xué)建筑設(shè)計研究院， 天津 300073;
3 濱海土木工程結(jié)構(gòu)與安全教育部重點實驗室， 天津大學(xué)， 天津 300072)
［摘要］以在天津塘沽區(qū)擬建的某張拉整體塔雕塑為背景，分析了預(yù)應(yīng)力大小對張拉整體塔結(jié)構(gòu)自振特性的影響規(guī)律。研究發(fā)現(xiàn)，張拉整體塔各階自振頻率隨預(yù)應(yīng)力的增大而增大，但10階后的頻率基本與預(yù)應(yīng)力水平無關(guān)；在多遇地震和罕遇地震作用下，結(jié)構(gòu)桿件內(nèi)力變化和節(jié)點位移均滿足規(guī)范要求，罕遇地震作用下各桿件動靜比明顯大于多遇地震，桿件動靜比隨初始預(yù)應(yīng)力的增大而減?。缓庇龅卣鹣?，結(jié)構(gòu)在多維地震作用下的響應(yīng)一般大于單維，XY向和XYZ向地震作用響應(yīng)基本一致。
［關(guān)鍵詞］張拉整體塔； 自振特性； 地震反應(yīng)
中圖分類號：TU347文獻(xiàn)標(biāo)識碼：A文章編號：1002-848X(2017)15-0016-05
Structural dynamic characteristics and seismic responses for a tensegrity tower
Jia Li1,2, Chen Zhihua1,3, Liu Hongbo1,3, Yan Xiangyu2, Wang Xiaoxiang1, Yan Shixiang1
(1 School of Civil Engineering, Tianjin University, Tianjin 300072, China; 2 Tianjin University Research
Institute of Architecture Design, Tianjin 300073, China; 3 Key Laboratory of Coast Civil Structure Safety of the Ministry of Education, Tianjin University, Tianjin 300072, China)
Abstract:A tensegrity tower in Tanggu district of Tianjin to be used as a city sculpture is taken as the research background. Its natural vibration properties and seismic responses were analyzed. Research results show that the structural frequencies of the tensegrity tower increase with the increase of the prestress level. However, the frequencies after 10 steps barely have relationship with the change of prestress level. In the case of frequently occurred earthquake and rare occurrence earthquake, the members internal forces and joint displacement meet the requirements of the specification. Dynamic to static ratio of all member under rare occurrence earthquake are much larger than those under frequently occurred earthquake and decrease with the increase of prestress level. In the case of rare occurrence earthquake, structure response under multidimensional excitations is generally greater than that under single dimension. Besides, structure responses under XY direction and XYZ direction are nearly the same.
Keywords:tensegrity tower; natural vibration property; seismic response
*國家自然科學(xué)基金資助項目(51478310)，天津市建委科技項目(2014-1)。
作者簡介：賈莉，博士，高級工程師，Email: jialigigi@sina.com。
