基于能量判据的结构抗震性能实用评估分析方法

Seismic Performance Evaluation Method of Structure Based on Energy Criterion

研究基于能量判据的具有累积损伤特性的结构抗震性能实用评估计算方法。采用基于低周疲劳损伤的累积损伤评估模型,推导出结构的滞回耗能的能力值和地震能量需求值的简化计算公式,建立更为合理的以能量判据的结构抗震破坏准则。最后通过一算例分析表明:根据对应的结构性能目标,用能量判据公式评估具有累积损伤特性的结构抗震性能,能全面评估地震作用下结构的破坏程度。该方法能够满足工程实际精度要求,也是非常简便、实用可行的。

The seismic performance evaluation methods of structures with cumulative damage characteristics based on energy criterion are studied. Using the cumulative damage assessment model based on fatigue damage calculation, a simplified calculation formula of the hysteretie energy dissipation ability and seismic energy demand value of structure are deduced, and a more reasonable seismic damage criteria for structure based on energy criterion evaluation method is established. Finally, the numerical example analysis shows that： according to the corresponding performance goals of structure, the energy criterion formula to comprehensive evaluate earthquake damage can satisfy the engineering precision requirement, and it is also very simple and practical and feasible.