A comparative study of different methods to calculate degrees of composite action for insulated concrete sandwich panels

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A comparative study of different methods to calculate degrees of composite action for insulated concrete sandwich panels. / Chen, An; Yossef, Mostafa; Hopkins, Paul.

In: Engineering Structures, Vol. 212, 110423, 01.06.2020.

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@article{7ccc0323d65447248511ea1ba2c9a273,
title = "A comparative study of different methods to calculate degrees of composite action for insulated concrete sandwich panels",
abstract = "Precast concrete sandwich wall panels consist of two outer wythes of precast concrete separated by a middle layer of insulation. In recent years, Fiber-Reinforced Polymer (FRP) shear connectors have been increasingly used since they have lower thermal conductivity compared to traditional steel shear connectors, which can significantly reduce thermal bridging. However, FRP shear connectors have lower stiffness, resulting in partial Degree of Composite Action (DCA), which is an important parameter to describe the structural behavior of the panels. Different methods have been proposed to calculate DCAs, including displacement method, strain method, and load method. This paper will compare and evaluate the effectiveness of these methods. A bending test was conducted on a full size of 7 m × 3 m, precast, prestressed insulated concrete sandwich panel with FRP shear connectors. A non-linear Finite Element (FE) model is created, where good correlations can be achieved between the test and FE results. The FE model is further employed to conduct a parametric study by varying the stiffness of the shear connectors. DCAs for different stiffnesses are calculated using the aforementioned three methods and the applicability and limitation of each method are investigated.",
keywords = "Displacement method, Insulated Concrete Sandwich Panel, Load method, Partial Degree of Composite Action, Strain method",
author = "An Chen and Mostafa Yossef and Paul Hopkins",
year = "2020",
month = "6",
day = "1",
doi = "10.1016/j.engstruct.2020.110423",
language = "English",
volume = "212",
journal = "Engineering Structures",
issn = "0141-0296",
publisher = "Elsevier BV",

}

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TY - JOUR

T1 - A comparative study of different methods to calculate degrees of composite action for insulated concrete sandwich panels

AU - Chen, An

AU - Yossef, Mostafa

AU - Hopkins, Paul

PY - 2020/6/1

Y1 - 2020/6/1

N2 - Precast concrete sandwich wall panels consist of two outer wythes of precast concrete separated by a middle layer of insulation. In recent years, Fiber-Reinforced Polymer (FRP) shear connectors have been increasingly used since they have lower thermal conductivity compared to traditional steel shear connectors, which can significantly reduce thermal bridging. However, FRP shear connectors have lower stiffness, resulting in partial Degree of Composite Action (DCA), which is an important parameter to describe the structural behavior of the panels. Different methods have been proposed to calculate DCAs, including displacement method, strain method, and load method. This paper will compare and evaluate the effectiveness of these methods. A bending test was conducted on a full size of 7 m × 3 m, precast, prestressed insulated concrete sandwich panel with FRP shear connectors. A non-linear Finite Element (FE) model is created, where good correlations can be achieved between the test and FE results. The FE model is further employed to conduct a parametric study by varying the stiffness of the shear connectors. DCAs for different stiffnesses are calculated using the aforementioned three methods and the applicability and limitation of each method are investigated.

AB - Precast concrete sandwich wall panels consist of two outer wythes of precast concrete separated by a middle layer of insulation. In recent years, Fiber-Reinforced Polymer (FRP) shear connectors have been increasingly used since they have lower thermal conductivity compared to traditional steel shear connectors, which can significantly reduce thermal bridging. However, FRP shear connectors have lower stiffness, resulting in partial Degree of Composite Action (DCA), which is an important parameter to describe the structural behavior of the panels. Different methods have been proposed to calculate DCAs, including displacement method, strain method, and load method. This paper will compare and evaluate the effectiveness of these methods. A bending test was conducted on a full size of 7 m × 3 m, precast, prestressed insulated concrete sandwich panel with FRP shear connectors. A non-linear Finite Element (FE) model is created, where good correlations can be achieved between the test and FE results. The FE model is further employed to conduct a parametric study by varying the stiffness of the shear connectors. DCAs for different stiffnesses are calculated using the aforementioned three methods and the applicability and limitation of each method are investigated.

KW - Displacement method

KW - Insulated Concrete Sandwich Panel

KW - Load method

KW - Partial Degree of Composite Action

KW - Strain method

UR - http://www.scopus.com/inward/record.url?scp=85081168113&partnerID=8YFLogxK

U2 - 10.1016/j.engstruct.2020.110423

DO - 10.1016/j.engstruct.2020.110423

M3 - Article

AN - SCOPUS:85081168113

VL - 212

JO - Engineering Structures

JF - Engineering Structures

SN - 0141-0296

M1 - 110423

ER -

ID: 41607214