结构在地震作用下的损伤状况及其抵御破坏荷载的残余能力，是抗震优化设计和震后工程加固的重要依据。
Damaged condition and residual capability to resist failure load of a structure under seismic action are important for seismic optimum design and post-earthquake strengthening.
建筑结构在地震作用下的破坏主要是由结构的低周疲劳累积损伤引起的。
The main destruction of constructions suffering from earthquake is brought by the accumulated damage of structures under low cycle fatigue.
动力强度破坏是网壳结构在遭受地震时的主要失效形式，准确的失效判别需要以基于材料损伤理论的分析为基础。
The dynamic strength failure is the main seismic failure mode of single-layer reticulated shells, and the prediction of failure load requires the consideration of material damage cumulation.
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