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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
Journal Basic Information
Journal DOI :
Korean Society for Advanced Composite Structures
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Volume & Issues
Volume 6, Issue 4 - Dec 2015
Volume 6, Issue 3 - Sep 2015
Volume 6, Issue 2 - Jun 2015
Volume 6, Issue 1 - Mar 2015
Selecting the target year
A Study on the Stiffnesses of the Advanced Composite Laminated Plates
Han, Bong Koo ; Kim, Yun Young ;
Journal of the Korean Society for Advanced Composite Structures, volume 6, issue 3, 2015, Pages 1~7
DOI : 10.11004/kosacs.2015.6.3.001
Compared with conventional construction materials such as steel and concrete, the advanced composite materials are corrosion-free, light-weight, and when used as construction materials, the construction period can be made less than one-tenth needed for conventional materials. However, because of the difficult theories and formulas, the ordinary construction engineers have difficulties in understanding and calculating formulas needed in construction. In this paper, calculation of the stiffnesses of the advanced composite laminated plates and compared with the result of stiffnesses.
A Study on Vegetated Embankment Slope Reinforcement Using A Synthetic Resine Based Net-hose System
Baek, Yong-Gi ; Lee, Min-Kyu ; Ahn, Jaehun ; Oh, Jeongho ;
Journal of the Korean Society for Advanced Composite Structures, volume 6, issue 3, 2015, Pages 8~13
DOI : 10.11004/kosacs.2015.6.3.008
This study investigates the application of a synthetic resine based net-hose system to sustain vegetated embankment slope reinforcement. The net-hose system is designated to improve water supply to the vegetation that can suffer the lack of water in case of extreme drying condition or rock slope where water supply is relatively insufficient to ensure the growth of vegetation. A series of laboratory tests were conducted to check the structural adequacy and effectiveness of net-hose system. The results indicated that the model slope equipped with net-hose system seemed to provide better water supply resulting in more vegetated areas and higher matric suction due to active water uptake capacity, which might be contributed to greater shear strength of slope surface. A limited numerical analysis was conducted to verify the effect of water uptake on vegetated root system that generally yields better slope stability.
Evaluation of structural performance in integrated precast decks for a rapid construction
Lee, Sang-Youl ;
Journal of the Korean Society for Advanced Composite Structures, volume 6, issue 3, 2015, Pages 14~19
DOI : 10.11004/kosacs.2015.6.3.014
In this study we developed an integrated precast concrete decks for a rapid construction. The structural performance in the integrated precast bridge decks is evaluated by real-scale test bed and detailed finite element analyses. The numerical analysis results were compared with the experimental data from a real-scaled single-span precast/prestressed concrete bridge decks under truck loading. Parametric studies are focused on the various effects of external loads on the structural behavior for different locations and measuring points on the precast bridge decks. The assessment in this study indicates that the integrated precast bridge decks show an excellent structural performance as expected.
Displacement Measurement of Pylon using Image Processing Technique
Son, Byung Jik ; Jeon, Seung Gon ; Heo, Gwang Hee ;
Journal of the Korean Society for Advanced Composite Structures, volume 6, issue 3, 2015, Pages 20~25
DOI : 10.11004/kosacs.2015.6.3.020
This paper introduces a digital image processing(DIP) method as a method for measuring the displacement of pylon. The comparison of DIP results and ANSYS analysis results verified the validity of the image processing technique. Normalized cross-correlation(NCC) coefficient was used and experiments were performed three times. It shows that the displacement difference was 22% and 5% compared to ANSYS results. Therefore, the image processing method is expected to be able to measure the displacement of pylon sufficiently.
A Fundamental Study on Effective Width Evaluation of Laminated Composite Box Girder
Chun, Kyoung-Sik ; Ji, Hyo-Seon ; Park, Won-Tae ;
Journal of the Korean Society for Advanced Composite Structures, volume 6, issue 3, 2015, Pages 26~31
DOI : 10.11004/kosacs.2015.6.3.026
The domestic and foreign specifications presented the effective width based on flange length to width ratio only. The existing paper on the effective width grasped of the effect of span, load type and cross-section properties, but localized steel bridges. Recently, The studies are going on in progress for the application of fiber reinforced composite material in construction field. Therefore, it is required to optimum design that have a good grasp the deformation characteristic of the displacements and stresses distribution and predict variation of the effective width for serviceability loading. This research addresses the effective width of all composite material box girder bridges using the finite element method. The characteristics of the effective width of composite structures may vary according to several causes, e.g., change of fibers, aspect, etc. Parametric studies were conducted to determine the effective width on the stress elastic analysis of all composite materials box bridges, with interesting observations. The various results through numerical analysis will present an important document for construct all composite material bridges.
Estimation on Clamping Force of High Strength Bolts Considering Temperature Variable of Both Site conditions and Indoor Environments
Nah, Hwan-Seon ; Lee, Hyeon-Ju ;
Journal of the Korean Society for Advanced Composite Structures, volume 6, issue 3, 2015, Pages 32~40
DOI : 10.11004/kosacs.2015.6.3.032
The torque shear high strength bolt is clamped normally at the break of pin-tail specified. However, the clamping forces on slip critical connections do not often meet the required tension, as it considerably fluctuates due to torque coefficient dependent on lubricant affected temperature. In this study, the clamping tests of torque shear bolts were conducted independently at indoor conditions and at construction site conditions. During last six years, temperature of candidated site conditions was recorded from
. The indoor temperature condition was ranged from
interval. As for site conditions, the clamping force was reached in the range from 159 to 210 kN and the torque value was from 405 to
. The range of torque coefficient at indoor conditions was analyzed from 0.126 to 0.158 while tensions were indicated from 179 to 192 kN. The torque coefficient at site conditions was ranged from 0.118 to 0.152. Based on this test, the variable trends of torque coefficient, tension subjected temperature can be taken by statistic regressive analysis. The variable of torque coefficient under the indoor conditions is
while it reaches
at actual site conditions. When the indoor trends and site conditions is combined, the modified variable of torque coefficient can be expected as
. and the modified variable of tension can be determined as
Member design and strength characteristics of the MMA mortar composites (I)
Ji, Hyo-Seon ; Mamdouh, El-Badry ;
Journal of the Korean Society for Advanced Composite Structures, volume 6, issue 3, 2015, Pages 41~49
DOI : 10.11004/kosacs.2015.6.3.041
The repair of manhole raise has been caused much construction times and disruption of traffic flow, serious environmental pollution from crushed construction wastes, and budget waste due to the repeated repair construction works. In order to overcome such problems, we have developed the new manhole repairing composite structures by using a glass fiber-reinforced polymer (GFRP) pipe, which can raise manhole to the regular height of the overlayed road pavement with rapid construction and minimum traffic jams. This environmental-friendly technology is method completed by the methyl methacrylate monomer (MMA) double wide flanged GFRP pipe composite structures in order to raise manhole to the regular height. In this paper, two kinds of the compressive strength tests of MMA mortar composites were conducted and evaluated by a general compressive strength test, and compressive strength test after freezing-thawing resistance test. It was found that this MMA mortar composites will be used for the application of the double wide flanged GFRP pipe composite structures.
An experimental study on structural behaviour of the MMA double wide flanged GFRP pipe composite structures (II)
Ji, Hyo-Seon ; Mamdouh, El-Badry ;
Journal of the Korean Society for Advanced Composite Structures, volume 6, issue 3, 2015, Pages 50~61
DOI : 10.11004/kosacs.2015.6.3.050
This paper presents on the structural behavior of the the methyl methacrylate monomer (MMA) double wide flanged the glass fiber-reinforced polymer(GFRP) pipe composite structures for the manhole raise. The evaluation of structural performance on this composite structure was conducted by the axial load, fatigue load, and ultimate load test. The assessment indicates that the MMA double wide flanged GFRP pipe composite structures was confirmed safety, durability and reliability in result as expected. It was found that this composite structure was able to short working times to around 30-50% and construction costs to around 10-23% with compare other construction methods. Also, environmental pollution and civil complaints will be prevented because there will be no longer any noises, vibrations, dust, or construction wastes.
Odyssey for the Standard Design of Highway Minor Structures (Cantilever Columns for Signs, Luminaries, Traffic Signals)
Cho, Taejun ; Kim, Myeong-Han ; Ji, Hyo-Seon ;
Journal of the Korean Society for Advanced Composite Structures, volume 6, issue 3, 2015, Pages 62~68
DOI : 10.11004/kosacs.2015.6.3.062
As a preparation of a design standard regarding road facilities, such as cantilever columns for traffic lights, street lights on highways is proposed. Currently these minor structures are designed based on guidelines which are mixed with multiple old foreign specifications without any criteria in terms of safety and economy, which could lead irregular safeties and the loss of national properties. In the considered two cases for effective projected area, it is found that following efficient way of design without critical analyses could make significant errors and miscalculations. Therefore, a fundamental research on the minor structures is urgently needed.
Detecting of the defects of pavement of a road by using infrared thermography
Sim, Jun-Gi ; Kim, Ki-Hyun ;
Journal of the Korean Society for Advanced Composite Structures, volume 6, issue 3, 2015, Pages 69~76
DOI : 10.11004/kosacs.2015.6.3.069
The purpose of this paper is to find an limitation to detect the defect of damaged asphalt pavement structures for infrared thermography. We use heat source of a natural light to detect the defect efficiently. The heat source was applied to the asphalt specimens. Four asphalt specimens were used: one was the asphalt containing depth of 1cm internal timber, two was the asphalt containing depth of 2cm internal void, Three was the asphalt containing depth of 3cm internal timber and four was not the asphalt containing internal timber. It was found that the depth of 3cm internal timber could be detected by this method. In addition, we used the image processing to make the damage zone displayed clear in the image obtained from the thermographic operation.
Buckling Load of Columns with Same Volume and Length but Variable Cross-section along the Length
Lee, Hong-Kyu ; Yoo, Jong-Ho ; Lee, Seung-Won ; Kim, Sun-Hee ; Won, Yong-Suk ; Yoon, Soon-Jong ;
Journal of the Korean Society for Advanced Composite Structures, volume 6, issue 3, 2015, Pages 77~85
DOI : 10.11004/kosacs.2015.6.3.077
In this paper, we present the result of investigations pertaining to the elastic buckling of simply supported columns with various cross-sectional dimensions but the same length and volume. In the investigations the accuracy of the analysis methods is studied and it was found that the result obtained by the successive approximations technique is the most accurate. In addition, the elastic buckling loads of columns with variable cross-section dimensions are obtained by the theoretical and numerical methods. From the results, it was found that the buckling loads obtained by the numerical methods are close to the buckling loads obtained by the successive approximations technique for the practical standpoints. Moreover, the buckling load of column with convexity in its middle is the highest while the buckling load of the tapered column is the lowest as expected.
Experimental Study on Pressures Changes on Infilling Soil and Geotextile Drain in Circular Acrylic Tube Structure
Kim, Hyeong-Joo ; Won, Myoung-Soo ; Lee, Jang-Baek ; Park, Tae-Woong ;
Journal of the Korean Society for Advanced Composite Structures, volume 6, issue 3, 2015, Pages 86~94
DOI : 10.11004/kosacs.2015.6.3.086
A series of injection and drainage test were conducted on an circular acrylic tube to investigate the pressure generated by the accumulated fill materials inside a circular acrylic tube structure. The acrylic tube was filled by means of gravity filling with a slurry material having an average water content of 700%. The water head during the filling process was 1.8m and the bottom pressure during initial filling was 20.18kPa. The recorded stress at the sides of the acrylic tube was 17.89kPa during the filling process and was reduced to 13.58kPa during the leaving process. Continuous drainage of the acrylic tube has greatly influenced the stresses around the tube structure. As the water is gradually allowed to overflow, the generated pressure at the topmost pressure sensor of the tube was reduced further to 2.17kPa. Eventually, the initially liquid state slurry material transforms into plastic state after water has dissipated and substantial soil particles are deposited in the acrylic tube. The final water content of the deposited silt inside the acrylic tube after the test was 42%. It was found that the state of stresses(geo-static earth pressures) in the acrylic tube was anisotropic rather than isotropic.