Open Access

ARTICLE

Ductility and Ultimate Capacity of Concrete-Filled Lattice Rectangular Steel Tube Columns

Chengquan Wang¹, Yun Zou^1,*, Tianqi Li¹, Jie Ding¹, Xiaoping Feng¹, Tiange Lei¹

1 Jiangnan University, No. 1800, Wuxi, 214000, China.

*Corresponding Author: Yun Zou. Email: .

Structural Durability & Health Monitoring 2018, 12(2), 99-110. https://doi.org/ 10.3970/sdhm.2018.02061

Abstract

A kind of concrete-filled lattice rectangular steel tube (CFLRST) column was put forward. The numerical simulation was modeled to analyze the mechanical characteristic of CFLRST column. By comparing the load-deformation curves from the test results, the rationality and reliability of the finite element model has been confirmed, moreover, the change of the section stiffness and stress in the forcing process and the ultimate bearing capacity of the column were analyzed. Based on the model, the comparison of ultimate bearing capacity and ductility between CFLRST column and reinforced concrete (RC) column were also analyzed. The results of the finite element analysis show that the loading process of CFLRST column consists of elastic stage, yield stage and failure stage. The failure modes are mainly strength failure and failure of elasto-plastic instability. CFLRST column has higher bearing capacities in comparison with reinforced concrete columns with the same steel ratio. In addition, the stiffness degeneration of CFLRST column is slower than RC column and CFLRST column has good ductility.

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Keywords

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