Axial Compression Behavior of Novel Latticed Columns with CFST Tubes and Corrugated Steel Plates for Industrial Structures

Metallurgical industrial buildings, particularly those over 10 years old, frequently experience increased vibrations in their latticed columns due to prolonged dynamic loads from cranes, affecting both structural safety and usability. To enhance the strength and stiffness of these structures in a cost-effective way, a novel composite latticed column made from concrete-filled steel tubes and corrugated steel plates is proposed. An analytical study on its axial compression behavior has also been conducted. The analytical parameters included the yield strength of steel tube and compressive strength of concrete, the waveform of corrugated steel plate, as well as the thickness, yield strength, and configuration of steel lacing tubes. Results show that compared to specimens with C30 concrete, the bearing capacity and initial axial stiffness of specimens with C50 concrete can increase by 35% and 33%, respectively. Compared with the steel specimen with yield strength of 235 MPa, the peak bearing capacity of the steel specimen with yield strength of 400 MPa can be increased by 28%. Additionally, increasing the wave height reduces the concrete cross section, resulting in a decrease in axial stiffness and ductility. Compared to specimens with horizontal lacing tubes, those with diagonal lacing tubes exhibit increases in ductility and axial stiffness of 33% and 12%, respectively. Therefore, diagonal lacing tubes should be considered for the optimal axial compression behavior of latticed columns. Furthermore, a model for predicting the axial compression bearing capacity of latticed columns with CFST tubes and corrugated steel plates was proposed.

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