This study was carried out aimed to investigate the effect of using concrete-filled steel tube (CFT) columns on steel moment frame with different numbers of stories by dynamic time history analysis. FEM method (formerly ABAQUS) was used for modeling. A model was first modeled in Abacus software according to the conditions and dimensions of the laboratory model and subjected to lateral cyclic loading. According to the results of comparison of hysteresis behavior, the specimen with CFT column has higher residual behavior and energy dissipation than the simple steel moment frame. Frame with CFT column has higher energy dissipation and lower resistance drop. 24 numerical models with 1, 2 and 3 stories were analyzed under different earthquakes. Time history charts of different models were compared. According to the results, the use of steel filled with concrete leads to increase the load-bearing of the frame in steel frame. Filling the steel column with concrete prevents the buckling of the concrete into the column and delays the local buckling of the steel wall. Concrete-filled steel frame steel has a better energy dissipation behavior than steel frame. Roof displacement of different frames with CFT column was lowers than that the roof displacement of steel frame, which indicates the frame performance has improved. The presence of concrete in the column has a significant effect on the behavior of the frame so that damage in the CFT column occurs at the panel zone where the column generally has a good behavior, but occurs in the steel column under buckling earthquake in the column.
In the present research, the seismic behavior of steel structure of moment frame with CFT column has been evaluated. Finite element method has been used for numerical modeling. In the modeling, the surface and volume elements were used for steel and concrete, respectively. One, two, and three-story frames with and without CFT column under different earthquakes were investigated through dynamic analysis of the time history. The results show that the steel frame with CFT column, in terms of energy dissipation, has better behavior than the steel frame. The roof displacement in the different frames with CFT is less than that of the steel frame which indicate the improved performance of the frame. Using the CFT column in the column, in comparison with steel column, has led an increase in the bearing capacity of the structure under the earthquake. By adding the concrete to the column, the failure status of the structure will change. In the model with CFT, the failure occurs mainly in the location of the panel zone, while in the steel column under earthquake, the buckling occurs in the column. The reason for that may be due to steelconcrete interaction, which in turn, will increase the bearing capacity of the CFT column. Presence of CFT column in the steel frames will result in increased bearing capacity of the frame. Filling the steel frame with concrete prevents the inward buckling of the column and delays the local buckling of the steel wall.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.