雕塑类大型复杂组合结构抗震性能研究
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摘要
泉州郑成功雕塑为复杂组合空间结构,其动力性能复杂。本文对其抗震性能进行详细研究,包括:结构自振特性分析、反应谱分析、时程分析、非一致激励分析等。研究结果表明,郑成功雕塑结构振型复杂,以水平振型为主,高阶振型间存在耦合效应。扭转耦连效应在复杂异形结构中比较重要,进行地震作用的反应谱分析时,建议采用CQC算法,并应考虑双向地震波输入和高阶振型影响。对于复杂组合空间结构,时程分析与反应谱分析结果的差异分布具有不确定性,在结构采用反应谱法设计完成后,应进行时程分析校核。郑成功雕塑的抗震性能良好,非一致激励影响可以忽略。本文研究方法和结果可对同类大型复杂组合结构的抗震性能研究提供参考。
Zheng Chenggong sculpture in Quanzhou is a complicacy composite structure,which dynamic performance shows diversity,complexity and other characteristics.This paper gives a detail study on the antiseismic properties of the sculpture,which mainly included:the vibration characteristics analysis,the response spectrum analysis,time history analysis and the analysis under the inconsistent excitation.The results indicate that the structure has complicated vibration mode,which is basically about horizontal vibration and its higher modes be in coupled.Effect of translation-torsion is very important to complex shaped structure,response spectrum analysis of earthquake should take the CQC algorithm in the condition that the torsional effect can not be ignored.For complicacy composite structures,the differences between the results of time history analysis and response spectrum analysis is uncertain,and the results of response spectrum analysis should be checked under the time history analysis.The sculpture has good seismic performance,the effort of the inconsistent excitation can be neglected.The results of the paper present references for the similar structures.
Zheng Chenggong sculpture in Quanzhou is a complicacy composite structure,which dynamic performance shows diversity,complexity and other characteristics.This paper gives a detail study on the antiseismic properties of the sculpture,which mainly included:the vibration characteristics analysis,the response spectrum analysis,time history analysis and the analysis under the inconsistent excitation.The results indicate that the structure has complicated vibration mode,which is basically about horizontal vibration and its higher modes be in coupled.Effect of translation-torsion is very important to complex shaped structure,response spectrum analysis of earthquake should take the CQC algorithm in the condition that the torsional effect can not be ignored.For complicacy composite structures,the differences between the results of time history analysis and response spectrum analysis is uncertain,and the results of response spectrum analysis should be checked under the time history analysis.The sculpture has good seismic performance,the effort of the inconsistent excitation can be neglected.The results of the paper present references for the similar structures.
引文
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[2]建筑抗震设计规范GB 50011-2010[S] Code for Seismic Design of Buildings[S].(in Chinese)
[3]刘庆林,傅学怡.反应谱CQC法合理振型数确定的研究[J].建筑结构学报,2006,27(6):87-93 LIU Qing-lin,FUXue-yi.Study on Determination of Reasonahle Mode Numbers for Response Spectrum CQC Method[J].Journal of Building Structures,2006,27(6):87-93.(in Chinese)
[4]卞朝东,李爱群,娄宇,吴耀辉.高层连体结构振型及其参与系数的分析[J].建筑科学,2002,18(4):20-24 BIAN Chao-dong,LI Ai-qun,LOU Yu,WU Yao-hui.Analysis of Vibration Modes and Participating Coefficients for High-rise Connecting Structure[J].Building Science,2002,18(4):20-24.(in Chinese)
[5]李忠献,史志利.行波激励下大跨度连续刚构桥的地震反应分析[J].地震工程与工程振动,2003,23(2):68-76 LI Zhong-xian,SHI Zhi-li.Seismic Response Analysis for Longspan Continuous Rigid-framed Bridges Under Excitation of Traveling Waves[J].Earthquake Engineering and Engineering Vibration,2003,23(2):68-76.(in Chinese)
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