The plastic development of high-strength bolts also means failure for the nodes.

The same yield stress distribution is parallel to the bevel of the stiffener, and then the web extending to the end plate of the beam is triangularly diffused. The column web has a faster stress increase at the lowermost row of bolts. The stress on the stiffener is also increasing. When all the stiffeners are plasticized, the yielding zone of the web at the shearing zone and the beam end plate is also larger.

The beam end plates and the locally thickened plates of the column flanges are kept flat without any bending. The plasticity of the first row and the second row of bolts is relatively full, and the beam end plate has a large rotation angle around the intersection of the flange and the end plate. With the increase of the load, the yielding part of the yielding part fully develops and spreads to the adjacent area. The lower flange of the beam undergoes large deformation and warpage occurs.

Q235 steel is used, so they have good plastic deformation ability, and the plasticity of high-strength bolts is obviously reduced. The plastic development of several high-strength bolts also means failure for the joints. Therefore, it is considered that the high-strength bolts reach the maximum value of the yield stress and the joints are considered to be invalid. . Since the calculation is only an approximate simulation, its calculation results can only be used as a basis for judging certain parameters (such as elastic ultimate bearing capacity and stress distribution of components).