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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of the Korean Society for Advanced Composite Structures
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Journal DOI :
Korean Society for Advanced Composite Structures
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Volume & Issues
Volume 2, Issue 4 - Dec 2011
Volume 2, Issue 3 - Sep 2011
Volume 2, Issue 2 - Jun 2011
Volume 2, Issue 1 - Mar 2011
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Development of A Component and Advanced Model for The Smart PR-CFT Connection Structure
Seon, Woo-Hyun ; Hu, Jong-Wan ;
Journal of the Korean Society for Advanced Composite Structures, volume 2, issue 4, 2011, Pages 1~10
DOI : 10.11004/kosacs.2011.2.4.001
This study investigates the performance of composite (steel-concrete) frame structures through numerical experiments on individual connections. The innovative aspects of this research are in the use of connections between steel beams and concrete-filled tube (CFT)columns that utilize a combination of low-carbon steel and shape memory alloy (SMA) components. In these new connections, the intent is to utilize the recentering provided by super-elastic shape memory alloy tension bars to reduce building damage and residual drift after a major earthquake. The low-carbon steel components provide excellent energy dissipation. The analysis and design of these structures is complicated because the connections cannot be modeled as being simply pins or full fixity ones they are partial restraint (PR). A refined finite element (FE) model with sophisticated three dimensional (3D) solid elements was developed to conduct numerical experiments on PR-CFT joints to obtain the global behavior of the connection. Based on behavioral information obtained from these FE tests, simplified connection models were formulated by using joint elements with spring components. The behavior of entire frames under cyclic loads was conducted and compared with the monotonic behavior obtained from the 3D FE simulations. Good agreement was found between the simple and sophisticated models, verifying the robustness of the approach.
Performance Analysis of Steel-FRP Composite Safety Barrier by Vehicle Crash Simulation
Lee, Min-Chul ; Kwon, Ki-Young ; Kim, Seung-Eock ;
Journal of the Korean Society for Advanced Composite Structures, volume 2, issue 4, 2011, Pages 11~18
DOI : 10.11004/kosacs.2011.2.4.011
In this study, the performance of a steel-FRP composite bridge safety barrier was evaluated through vehicle crash simulation. Surface veil, DB and Roving fibers were used for FRP. The MAT58 material model provided by LS-DYNA software was used to model FRP material. Spot weld option was used for modeling contact between steel and FRP beam. The structural strength performance, the passenger protection performance, and the vehicle behavior after crash were evaluated corresponding to the vehicle crash manual. As the result, A steel-FRP composite safety barrier was satisfied with the required performance.
Compression Strength Test of FRP Reinforced Concrete Composite Pile
Lee, Young-Geun ; Choi, Jin-Woo ; Park, Joon-Seok ; Yoon, Soon-Jong ;
Journal of the Korean Society for Advanced Composite Structures, volume 2, issue 4, 2011, Pages 19~27
DOI : 10.11004/kosacs.2011.2.4.019
In this paper, we present a part of results to develop new type hybrid FRP-concrete composite pile (i.e., concrete filled fiber reinforced plastic circular tubes, hybrid CFFT, HCFFT). The purpose of this paper is to evaluate compressive loading capacity through compressive strength test. Before compressive strength test of HCFFT, we investigated mechanical properties of pultruded fiber reinforced plastic (PFRP) and filament winding fiber reinforced plastic (FFRP). For estimating the compressive strength of HCFFT, uni-axial compression strength tests of HCFFT compression members were conducted. The test variables are compressive strengths of concrete and thickness of FFRP. In addition, uni-axial compression strength tests of concrete filled fiber reinforced plastic circular tube (CFFT) except PFRP members were conducted. The test variable in the test is thickness of FFRP. From the test result, the compressive strength of the HCFFT in larger than compressive strength of CFFT as much as 47%. It can be observed that the uni-axial compressive strength of the HCFFT increased if the concrete strength and the thickness of exterior filament winding FRP tube increased. In addition, the finite element analysis result is compared with the experimental result. The difference between the experimental and FEM results is in the range of 0.14% to 17.95%.
Examination of Seismic Design for High-Rise Steel Frames Under Huge Earthquake Using Element Bi-linear Time-History Analysis
Kim, Moon-Jeong ;
Journal of the Korean Society for Advanced Composite Structures, volume 2, issue 4, 2011, Pages 28~34
DOI : 10.11004/kosacs.2011.2.4.028
Because strong urban earthquakes must produce huge losses of both life and property, examinations about the effect of huge earthquakes for tall buildings are very required. The goal of this report is examining model safety and compare the behavior of 2-D tall models under huge seismic loads. This report examines high-rise models designed KBC2009 codes using 1) seismic loads regulated by KBC2009 and 2) amplified seismic loads assumed to strong earthquakes. And observing for more realistic behavior of tall buildings under huge earthquakes, this report takes two analysis methods - response spectrum analysis and non-linear time history analysis considering P-delta effect.
Large Displacement Behaviors of Foam-Insulated Concrete Sandwich Panels Subjected to Uniform Pressure
Kang, Jun-Suk ; Won, Deok-Hee ; Kang, Young-Jong ;
Journal of the Korean Society for Advanced Composite Structures, volume 2, issue 4, 2011, Pages 35~43
DOI : 10.11004/kosacs.2011.2.4.035
This study examined the structural behaviors of foam insulated concrete sandwich panels subjected to uniform pressure. Finite element models were used to simulate the detailed shear resistance of connectors and the nonlinear behaviors of concrete, foam and rebar components. The models were then validated using data from static tests performed at the University of Missouri. Both composite and non-composite action had a significant effect on the response of the foam insulated concrete sandwich panels, indicating that the simulated shear tie resistance should indeed be incorporated in numerical analyses. The modeling approach used here conveniently simulated the structural behaviors during all loading stages (elastic, yielding, ultimate and post-failure) and was compatible with the American Concrete Institute (ACI) Code and existing design practices. The results of this study will therefore provide useful guidelines for the analysis and design of foam insulated sandwich panels under both static and dynamic loadings.