基于能量平衡的连体结构性能设计方法
Performance Design Method for Energy-Balanced Connected Structures
针对偏心连体结构在地震中易受扭转损伤且设计复杂的问题,以黏滞阻尼器混合隔震的偏心连体结构为研究对象,提出了一种基于能量平衡的性能化设计方法。该方法通过模态推覆分析建立结构各阶模态的“能量-位移”关系,依据规范中的反应谱确定地震能量输入,进而预测结构的层间位移角响应,并反向设计满足位移控制目标的黏滞阻尼器参数。结果表明:该方法能有效预测结构响应,预测误差在工程可接受范围内,且混合隔震体系的预测精度优于纯隔震体系。经该方法设计,结构在各水准地震下均能满足性能目标,混合隔震策略对偏心连体结构效果尤为显著,能有效抑制扭转并控制隔震层位移。
This paper addresses the issue of torsional damage and complex design of eccentric integral structures during earthquakes. Using a mixed isolation eccentric integral structure with viscous dampers as the research object, a performance-based design method based on energy balance is proposed. This method establishes the “energy-displacement” relationship of various modal levels of the structure through modal pushover analysis, determines the seismic energy input according to the response spectrum in the code, and predicts the inter-story drift angle response of the structure, subsequently reverse designing the parameters of the viscous dampers to meet the displacement control goals. The results show that this method can effectively predict the structural response, with prediction errors within engineering acceptable ranges, and the prediction accuracy of the mixed isolation system is superior to that of the pure isolation system. Structures designed using this method can satisfy performance objectives under various levels of seismic events. The mixed isolation strategy is particularly effective for eccentric integral structures, effectively suppressing torsion and controlling the displacement of the isolation layer.
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宁夏自然科学基金重点项目(2025AAC020038)
国家自然科学基金资助项目(52268033)
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