考虑动力相互作用的变电站数值模拟和损伤评估

Numerical Simulation and Damage Assessment of Substation Involving Dynamic Interaction

基于主-子结构动力相互作用机理、隐式动力学数值模拟分析及振动台试验,对考虑主-子结构相互作用的变电站结构体系的抗震性能及破坏模式开展了系统研究,分别从内力、位移、加速度等多方面进行了结构体系的地震反应分析,得到了电气设备与主体结构的相互作用机理及电气设备的动力放大系数,并定量分析了动力特性和地震响应值;提出了主体结构的抗震性能目标;基于位移修正系数法建立了变电站主体结构的层损伤评估模型和整体损伤评估模型,并通过振动台试验验证了所提出损伤评估模型的正确性.研究结果对同类生命线工程和具有复杂设备工业建筑的抗震设计和震损评估具有重要借鉴作用.

The seismic performance and failure mechanisms of the substation structure system considering dynamic interaction on the main structure and substructure was studied systematically, based on the mechanism of primary-secondary structure dynamic interaction, implicit dynamics numerical simulation analysis and shaking table test. Seismic response of the structure system was analyzed in some aspects such as internal force, displacement and acceleration. This paper obtained the interaction mechanism between the electrical equipment with main structure, the dynamic magnification factor of the electrical equipment and the dynamic property values, and put forward the seismic performance goals of the main structure. Meanwhile, the results based on the displacement revised factor method established the level damage assessment model and the overall damage assessment model, and then proved the correctness of the damage assessment model by shaking table test. These research results have important reference function on seismic design and seismic damage assessment of the similar lifeline engineering and industrial architectures with complex equipment.