Experiments on Bending Rigidity and Resistance of Unstiffened Tubular Joints

The importance of the research on moment resistant properties of unstiffened tubular joints and the present research background both domestic and abroad are introduced.The experimental research on the bending rigidity and bearing capacity of the joints are performed,in combination with the practical demands of a key construction project.In the paper,the test procedure and main results are described.By the tests on specimens with sets of various geometrical parameters of the joints and several loading combinations,it is shown that the unstiffened joints can be referred to as full rigid joints,and their bending capacities can assure the strength of the members connected under certain limitations.