Nonlinear Analysis of Square CFT Columns with Fiber Beam/Column Element
Конференцијски прилог (Објављена верзија)
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The use of concrete filled steel tubes (CFT columns) in seismically active regions is becoming more common and widespread due to numerous advantages they offer over steel and reinforced concrete columns, such as increased ductility, buckling delay and good cyclic performance. Since the behavior of CFT columns is highly nonlinear, a numerical model needs to consider different nonlinear effects. The model proposed in this paper adopts the nonlinear force based beam/column element that takes into account the nonlinear behavior of steel and concrete, confinement effects and geometrical nonlinearities. Through a parametric study, different material
models for steel and concrete, widely available in commercial software programs, are evaluated and the constitutive model parameters that best approximate the behavior of CFT columns under static loading conditions are determined. This numerical model is then validated through a comparison with a number of experimental tests from the literature.... Different types of loading (cyclic static and dynamic), types of structures with different slenderness of tested specimens and B/t ratio are considered. In addition, limitations of the proposed fiber element model for modelling CFT columns are emphasized.
Кључне речи:
composite columns / distributed plasticity / numerical analysis / uniaxial material model / OpenSEESИзвор:
16th European Conference on Earthquake Engineering-Thessaloniki, 18 - 21 June, 2018, 2018Финансирање / пројекти:
- Побољшање енергетске ефикасности зграда у Србији и унапређење националних регулативних капацитета за њихову сертификацију (RS-MESTD-Integrated and Interdisciplinary Research (IIR or III)-42012)
Колекције
Институција/група
GraFarTY - CONF AU - Blagojević, Nikola AU - Kostić, Svetlana PY - 2018 UR - https://grafar.grf.bg.ac.rs/handle/123456789/3261 AB - The use of concrete filled steel tubes (CFT columns) in seismically active regions is becoming more common and widespread due to numerous advantages they offer over steel and reinforced concrete columns, such as increased ductility, buckling delay and good cyclic performance. Since the behavior of CFT columns is highly nonlinear, a numerical model needs to consider different nonlinear effects. The model proposed in this paper adopts the nonlinear force based beam/column element that takes into account the nonlinear behavior of steel and concrete, confinement effects and geometrical nonlinearities. Through a parametric study, different material models for steel and concrete, widely available in commercial software programs, are evaluated and the constitutive model parameters that best approximate the behavior of CFT columns under static loading conditions are determined. This numerical model is then validated through a comparison with a number of experimental tests from the literature. Different types of loading (cyclic static and dynamic), types of structures with different slenderness of tested specimens and B/t ratio are considered. In addition, limitations of the proposed fiber element model for modelling CFT columns are emphasized. C3 - 16th European Conference on Earthquake Engineering-Thessaloniki, 18 - 21 June, 2018 T1 - Nonlinear Analysis of Square CFT Columns with Fiber Beam/Column Element UR - https://hdl.handle.net/21.15107/rcub_grafar_3261 ER -
@conference{ author = "Blagojević, Nikola and Kostić, Svetlana", year = "2018", abstract = "The use of concrete filled steel tubes (CFT columns) in seismically active regions is becoming more common and widespread due to numerous advantages they offer over steel and reinforced concrete columns, such as increased ductility, buckling delay and good cyclic performance. Since the behavior of CFT columns is highly nonlinear, a numerical model needs to consider different nonlinear effects. The model proposed in this paper adopts the nonlinear force based beam/column element that takes into account the nonlinear behavior of steel and concrete, confinement effects and geometrical nonlinearities. Through a parametric study, different material models for steel and concrete, widely available in commercial software programs, are evaluated and the constitutive model parameters that best approximate the behavior of CFT columns under static loading conditions are determined. This numerical model is then validated through a comparison with a number of experimental tests from the literature. Different types of loading (cyclic static and dynamic), types of structures with different slenderness of tested specimens and B/t ratio are considered. In addition, limitations of the proposed fiber element model for modelling CFT columns are emphasized.", journal = "16th European Conference on Earthquake Engineering-Thessaloniki, 18 - 21 June, 2018", title = "Nonlinear Analysis of Square CFT Columns with Fiber Beam/Column Element", url = "https://hdl.handle.net/21.15107/rcub_grafar_3261" }
Blagojević, N.,& Kostić, S.. (2018). Nonlinear Analysis of Square CFT Columns with Fiber Beam/Column Element. in 16th European Conference on Earthquake Engineering-Thessaloniki, 18 - 21 June, 2018. https://hdl.handle.net/21.15107/rcub_grafar_3261
Blagojević N, Kostić S. Nonlinear Analysis of Square CFT Columns with Fiber Beam/Column Element. in 16th European Conference on Earthquake Engineering-Thessaloniki, 18 - 21 June, 2018. 2018;. https://hdl.handle.net/21.15107/rcub_grafar_3261 .
Blagojević, Nikola, Kostić, Svetlana, "Nonlinear Analysis of Square CFT Columns with Fiber Beam/Column Element" in 16th European Conference on Earthquake Engineering-Thessaloniki, 18 - 21 June, 2018 (2018), https://hdl.handle.net/21.15107/rcub_grafar_3261 .