The steel structure can now be a lot cheaperīy already considering flexible connections in the design of the main supporting structure instead of fully rigid connections, connections can become much cheaper and a correct force distribution is calculated. The trilinear rotational stiffness diagram is used for this purpose. For larger moments with the rotational stiffness Sj corresponding to the bending moment Mj,Ed. For small moments (below 2/3 Mj,Rd), initial rotational stiffness Sj,ini is calculated. This naturally gives the most accurate result and leads to an economically optimal design.
In XFrame2D, the load-dependent rotational stiffness is automatically taken into account for all moment connections. The rotational stiffness of the connections is load-dependent and affects the force distribution. Girder-column moment connections and moment butt joints can be easily implemented. XFrame2D has an integrated EN connection module.
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