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介绍了结构地震下的几种破坏准则，并归纳了焊接钢结构的两种破坏准则：首超破坏准则和累积损伤破坏准则，给出统一两种破坏准则的基于低周疲劳特性的以等效延性为主要参数的表达式．最后简单介绍了结合破坏准则的焊接钢结构梁柱节点的抗震试验．
This paper introduces several failure criteria under structural earthquake and summarizes two kinds of failure criteria of welded steel structure: the first super-failure criterion and the cumulative damage failure criterion, and gives the unified failure criterion based on the low-cycle fatigue characteristic with equivalent Ductility as the main parameter of the expression. Finally, the seismic behavior of welded steel structure beam-column joints with failure criterion is introduced briefly.