Session Start Date

11-6-2014

Session End Date

11-6-2014

Abstract

Composite action in systems consisting of steel and concrete depends on an effective shear-transfer mechanism between the two materials. Such mechanism for smooth steel surfaces inside concrete will be limited to the bond-slip behavior at the steel/concrete interfaces. This research investigates the bond-slip behavior of galvanized cold-formed (light gauge) steel profiles embedded in concrete. A new innovative pull-out test is presented and global bond-slip curves for different values of concrete strength are obtained from such tests. Next, through an innovative procedure, mathematical equations and a few points from the experimental global bond-slip curves are used to develop a bi-linear local bond-slip model which represents the local bond-slip behavior. Then by curve fitting, empirical equations are proposed to determine the suggested model’s parameters based on concrete compressive strength. Finally, validity of the proposed model is explored by two methods: 1) by comparing its resulting global bond-slip graphs from analytical equations with test results. 2) by comparing its resulting global bond-slip graphs from finite element modeling with test results.

Department(s)

Civil, Architectural and Environmental Engineering

Research Center/Lab(s)

Wei-Wen Yu Center for Cold-Formed Steel Structures

Meeting Name

22nd International Specialty Conference on Cold-Formed Steel Structures

Publisher

Missouri University of Science and Technology

Publication Date

11-6-2014

Document Version

Final Version

Rights

© 2014 Missouri University of Science and Technology, All rights reserved.

Document Type

Article - Conference proceedings

File Type

text

Language

English

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Bond-Slip Characteristics between Cold-Formed Metal and Concrete

Composite action in systems consisting of steel and concrete depends on an effective shear-transfer mechanism between the two materials. Such mechanism for smooth steel surfaces inside concrete will be limited to the bond-slip behavior at the steel/concrete interfaces. This research investigates the bond-slip behavior of galvanized cold-formed (light gauge) steel profiles embedded in concrete. A new innovative pull-out test is presented and global bond-slip curves for different values of concrete strength are obtained from such tests. Next, through an innovative procedure, mathematical equations and a few points from the experimental global bond-slip curves are used to develop a bi-linear local bond-slip model which represents the local bond-slip behavior. Then by curve fitting, empirical equations are proposed to determine the suggested model’s parameters based on concrete compressive strength. Finally, validity of the proposed model is explored by two methods: 1) by comparing its resulting global bond-slip graphs from analytical equations with test results. 2) by comparing its resulting global bond-slip graphs from finite element modeling with test results.