新型子结构消能伸臂控制体系的抗震性态分析与减震机理研究

For the existing outriggers structure system, the energy dissipation scheme of arranging the damper on the outriggers is recognized, but there is still room for optimization in improving the structural integrity and improving the damping efficiency. The project is based on the idea for the formation of “main structure” of key components to ensure the integrity of the system, and the secondary components form the “substructure” to achieve structural independence, and it is proposed to use a feature of the relatively large deformation of the two to propose a novel outriggers control system with energy dissipation substructure. The simplified model of dynamic analysis is established with its dynamic characteristics and sensitivity characteristics of design parameters are studied. Then, the parameter influence laws of dynamic response are revealed, and the distribution of optimal parameters and the selection of substructure damper parameters are given. Based on power flow theory, random energy analysis model is established to discuss its damping mechanism, clarify the flow rules and distribution characteristics of power flow, and verify its effectiveness. This study aims to propose a new type of outriggers control system and establish a relatively perfect dynamic analysis theory to provide strong support for aseismic performance evaluation, design and engineering applications.

对于现有的伸臂结构体系，在其伸臂上布置阻尼器的耗能方案得到了认可，但在改善结构整体性和提升减震效率方面尚有优化空间。本项目基于关键构件形成“主结构”确保体系完整，次要构件形成“子结构”实现结构独立，拟利用两者相对变形大的特点提出一种新型子结构消能伸臂控制体系。建立其动力分析简化模型，研究其动力特性及关于设计参数的灵敏度特征，揭示影响动力响应的规律，给出最优参数的分布情况及子结构阻尼器参数的选择建议；基于功率流理论，建立随机能量分析模型，探讨其减震机理，明确功率流流动规律与分布特征，并验证其有效性。本研究旨在提出一种新型的伸臂结构控制体系，并建立完善的动力分析理论，为其减震性能评估、设计及工程应用提供有力的支撑。

消能伸臂体系通过两类阻尼器布置方案有效缓解了伸臂设置所引起的结构内力突变问题，并提高了传统伸臂体系的抗震性能，但在改善结构整体性和提升减震效率方面尚有优化空间。本课题基于关键构件形成“主结构”确保体系完整，次要构件形成“子结构”实现结构独立，拟利用两者相对变形大的特点提出一种新型子结构消能伸臂控制体系。通过建立动力分析简化模型，研究其动力特性及关于设计参数的敏感性，揭示影响动力响应的规律，给出最优参数的分布情况及子结构阻尼器参数的选择建议；基于随机能量分析理论，建立能量分析模型，探讨其减震机理，明确能量分配与传递特征；结合理论分析，进行振动台试验，验证新型子结构消能伸臂控制体系的有效性，同时给出设计建议。本研究建立该体系的动力分析理论，为其减震性能评估、设计及工程应用提供有力支撑。