论文部分内容阅读
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。
A practical assessment method of seismic behavior of structures with cumulative damage characteristics based on energy criterion is studied. Based on the cumulative damage assessment model based on low-cycle fatigue damage, a simplified formula for calculating the hysteretic energy dissipation and the demand for seismic energy is deduced, and a more reasonable criterion for seismic damage of structures based on energy criterion is established. Finally, a numerical example shows that according to the corresponding structural performance target, the formula of energy criterion can be used to evaluate the seismic performance of structures with cumulative damage characteristics, which can fully evaluate the structural damage under earthquake. The method can meet the actual engineering requirements, is also very simple, practical and feasible.