Investigation of the modular building metal frame nodal connection rotational stiffness

The research subject is the rotational stiffness of modular building metal frame nodal connection. connections has a significant impact on results calculating load-bearing building. It known that absolutely rigid exist only in theory. In practice, each connection finite stiffness, as evidenced by numerous studies researchers. When designing real objects, certain design should be carried out. As rule, when there no time to carry out research. designer operates with well-known and reliably proven recommendations. important for him have ready-made solutions implementation practice. Such can provided basis preliminary joints’ behavior structural elements under load. article presents solution such problem. study connected parameters variation been purpose find boundaries at which considered rigid.