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

• 作者: Chengquan Wang Jie Ding Tiange Lei Tianqi Li Xiaoping Feng Yun Zou
• 来源期刊: 结构耐久性与健康监测(英文)
• 学科: 工学
• 关键词: STEEL-CONCRETE composite structure concrete-filled LATTICE rectangular steel tube COLUMN nonlinear finite element ULTIMATE strength DUCTILITY
• 年，卷（期）: 2018,（2）
• 页码范围: 99-110
• 页数: 12页
• 分类号: TG1

摘要

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 elastoplastic 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.