Study on axial compression behaviors of dense-steel-column sandwich wall

As an innovative structural system, the modular steel structure building has been widely used. This paper presents a new modular structure called dense-steel-column sandwich wall. Eight walls were subjected to axial compression tests to investigate the effects of column section size and diagonal brace on the axial compression behavior of the wall. The results show that the bearing capacity can be improved by setting diagonal brace or increasing the column width, additionally, diagonal brace can improve the deformation ability of the wall. The wall tends to change from global instability failure to local instability failure as the column width increases. Based on the test results, refined finite element analysis models were established and compared with the tests, followed by multi-parameter analysis. The failure mode and peak load of the specimens obtained by numerical simulation closely matched the test results, showing the correctness of the finite element model. Moreover, the results of finite element analysis demonstrate that increasing of wall length to column spacing ratio, column thickness, and decreasing of column slenderness ratio can significantly improve the bearing capacity and axial compressive stiffness of the wall. Finally, the axial compression capacity calculation formulas were put forward, and the research findings can provide a reference for the engineering application of the dense-steel-column sandwich wall.

Automated summary

This paper presents a new modular structure called dense-steel-column sandwich wall and investigates its axial compression behavior through eight axial compression tests. The results show that the bearing capacity of the wall can be improved by setting diagonal brace or increasing the column width. Finite element analysis models based on the test results are established and the numerical simulation closely matches the test results, demonstrating the correctness of the finite element model. The research findings provide a reference for the engineering application of the dense-steel-column sandwich wall.