The paper analyzed three-dimensioned stress state of cracking tip for strech slab by method of finite element based on software ANSYS and gained the distributional discipline of stress for cracking tip of steel structure.

• 利用ANSYS软件对受拉平板缺口尖端三维应力状态进行了有限元分析，获得了钢结构缺口尖端的应力分布规律。