消能冗余伸臂框架—芯筒体系的损伤破坏与减震控制研究

This project proposes a novel damped redundent outriggers structure system. A general simplified dynamic analysis model will be developed, which can be used for both outrigger structure and damped outrigger system, therefore a partial differential equation governing the motion can be derived. A closed-form analytical solution is developed to gain insight into the influencing rules of outrigger position, damping effect and stiffness of core, columns and outrigger. The optimal placement of asismic outriggers and damped outriggers, optimum damping coefficient and resonable stiffness ratio of core and frame-columns to outrigger can be obtained. A smart piezoelectric damper with anti-wind locking device will be developed for the novel damped outrigger system. The reliabity of the novel system and its sensitivity is investigated under randam excitaion and structure parameters for convenient design of the novel damped redundent outriggers structure system. Damage mechanism and collapse failure mode of this damped redundent outriggers structure system will be studied and, the seismic energy dissipation distribution regularities will be analyzed and compared with the corresponding outrigger structure. A performance-based design method for the novel damped redundent outriggers structure system is put forward. This project can provide necessary scientific and technological support for applying the technology of energy dissipation to giant damped outriggers frame-corewall structures, which is of theoretical and practical significances and good application prospect.

本项目针对巨型伸臂框架-芯筒体系，提出将抗震赘余伸臂设计成消能伸臂，形成消能冗余伸臂框架-芯筒体系。建立该新型消能体系的通用动力分析模型，推导出该体系的动力特性与地震响应解析解，揭示抗震伸臂与消能伸臂的最优位置，消能器参数和芯筒、框架等结构参数对其动力特性与减震性能的影响规律。研发一种具有抗风锁定功能的压电智能阻尼器，可最大限度地发挥该结构体系的抗风减震性能。研究结构与消能器随机参数下该消能冗余伸臂框架-芯筒体系的可靠度及其灵敏度，分析该新型结构体系在强震下的损伤机理和破坏倒塌机制，探讨该新型体系的地震能量耗散分布规律特征。在此基础上提出该消能冗余伸臂框架-芯筒体系基于性态的抗震设计方法。该项目的研究将有利于改善传统伸臂框架-芯筒体系在强震下的抗震性能，具有重要的科学理论价值、现实意义与应用前景。