雕塑类大型复杂组合结构抗震性能研究

摘要

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 anti-seismic 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.%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.