C Type Cold-formed Thin-walled Steel Composite Truss Beam Stress Performance Test

With China ’s steel structure industry entering the road of industrial production,light steel structure has become a new trend in the development of green buildings,and the construction industry has begun to explore new green building development models.Cold-formed thin-walled steel is a new building material with large development space,and it is also a common material in light steel structure buildings.Therefore,the research on the stress of cold-formed thin-walled steel members has great engineering value.Taking a light steel structure villa project as the research object,three composite truss beams were made,and the variable was the number of steel plates.The mechanical properties of light steel structure beams were analyzed by mechanical test.The ABAQUS finite element analysis software was used to establish the model and carry out numerical analysis.The bending bearing capacity and deformation results obtained by the two research methods were compared.The results show that the deformation of the composite truss beam is not obvious before the damage.The bare skeleton beam is damaged due to the shear of self-tapping screws,and the ultimate bearing capacity depends on the shear capacity of screws.The failure of beam bonded with steel plate is caused by the deformation of the chord at the loading point.The steel plate bears a part of the shear force.With the increase of the number of bonded steel plates,the ultimate bearing capacity of the beam is continuously improved,and the stiffness is also increasing.It shows that the bonded steel plate can effectively improve the bearing capacity of the beam and reduce the deformation of the beam.The deviation between the numerical test and the actual test results is not large,indicating that the actual force of the beam can be accurately simulated by reasonably setting the relevant parameters.The research work will provide a theoretical reference for the research and design of composite truss beams,and provide a way to optimize the component form for the application of truss beam system in practical engineering.Figure 42;Table 8;Reference 54...