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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of the Korea institute for structural maintenance and inspection
Journal Basic Information
Journal DOI :
Korea Institute for Structural Maintenance Inspection
Editor in Chief :
Volume & Issues
Volume 12, Issue 6 - Nov 2008
Volume 12, Issue 5 - Sep 2008
Volume 12, Issue 4 - Jul 2008
Volume 12, Issue 3 - May 2008
Volume 12, Issue 2 - Mar 2008
Volume 12, Issue 1 - Jan 2008
Selecting the target year
The Trend and Current of the Demolition Industry in Domestic and Foreign
Kim, Hyo-Jin ; Park, Sung-Sik ; Lee, Kyoung-Hee ;
Journal of the Korea institute for structural maintenance and inspection, volume 12, issue 1, 2008, Pages 3~8
The Survey and Analysis on the Demand of Demolition Technology Development
Kim, Chang-Hak ; Lyu, Chang-Ha ; Lee, Kyoung-Hee ;
Journal of the Korea institute for structural maintenance and inspection, volume 12, issue 1, 2008, Pages 9~16
The Status and Pending Question of the Domestic Demolition Technology
Jeon, Seok-Won ; Suh, Yung-Su ; Kim, Hyo-Jin ;
Journal of the Korea institute for structural maintenance and inspection, volume 12, issue 1, 2008, Pages 17~26
Application of JS GROUT-PLUG System to Repair Crack of Concrete Structures
Park, Tae-In ; Chio, Ki-Bong ; An, Sang-Ro ; Won, Jong-Pil ;
Journal of the Korea institute for structural maintenance and inspection, volume 12, issue 1, 2008, Pages 27~36
Discussion on the Collapse of Lighting Tower in Ship Racing Arena
Song, Dong-Yub ; You, Young-Chan ;
Journal of the Korea institute for structural maintenance and inspection, volume 12, issue 1, 2008, Pages 37~42
Development of Fluid Silicic Acid Coating with Paint Materials of the Steel Electric Power Facilities
Kwon, Seung-Jun ; Park, Sang-Sun ; Lee, Sang-Min ; Lee, Myung-Hoon ;
Journal of the Korea institute for structural maintenance and inspection, volume 12, issue 1, 2008, Pages 57~64
Generally, organic paint on steel towers can guarantee durability in normal condition but occasionally shows its deterioration on the power line tower and electric power facilities, exposed to light(ultra violet) or heat. The objective of this study is to develope the inorganic paint material based on fluid silicic acid for steel electric power facilities. For the purpose, optimal mixture proportion is derived through 6 preliminary test and, additionally physical and durability performance test are carried out for selected specimens. The performances of developed organic paint material is similar to those of organic paint material. If resistance to chemical attack is improved, the developed inorganic paint is evaluated to replace the organic paint and obtain wide application.
A Proposal of Simplified Bond Stress-Slip Model between FRP Plank and Cast-In-Place Concrete
Yoo, Seung-Woon ;
Journal of the Korea institute for structural maintenance and inspection, volume 12, issue 1, 2008, Pages 65~72
The use of hybrid FRP-concrete structures with a dual purpose of both permanent formwork and reinforcement, has been considered in some studies recently. For the FRP plank and the concrete to act as a composite structural member a satisfactory bond at the interface between the smooth surface of the pultruded plank and the cast-in-place concrete must be developed. Sand was bonded to the pultruded FRP plank using a commercially available epoxy system. In applying general analysis techniques to evaluate the performance of composite structures with FRP stay-in-place forming, it is essential that characteristics of the bond stress-slip relation be identified. In this study I would like to propose a simplified bilinear bond stress-slip model for FRP composite structures.
Appraisal Study on Tensile Test Method of Mechanical Properties of FRP Composite Used in Strengthening RC Members
You, Young-Chan ; Choi, Ki-Sun ; Kang, In-Seok ; Kim, Keung-Hwan ;
Journal of the Korea institute for structural maintenance and inspection, volume 12, issue 1, 2008, Pages 73~80
Experimental study has been performed in order to construct the standard test methods and appraisal criteria by investigating the influence of specimen types(property, width, layers) and loading rate on the tensile characteristics of FRP used in strengthening RC structures. The FRP composite tested in this study are the unidirectional CFRP sheet/strip and the bidirectional GFRP sheet. Test variables consist of the various width ranging from 10mm to 25mm and number of CFRP sheets plied up to 5 layers. Test results indicated that maximum tensile strength and minimum coefficient of variation are recorded at each different width according to the fiber types and weaving directions. Also, the average tensile strengths of CFRP sheets are decreased as the number of layer of CFRP sheet are increased.
Forced-Vibration-Based Identification of Stiffness Reduction Distribution in Thin Plates with an Arbitrary Damage Shape
Song, Yoo-Seob ; Lee, Sang-Youl ; Park, Tae-Hyo ;
Journal of the Korea institute for structural maintenance and inspection, volume 12, issue 1, 2008, Pages 81~90
This study deals with a method to identify structural damage using the combined finite element method (FEM) and the advanced damage search technique. The novelty of this study is the application of plates with arbitrary damage shapes and their response due to the anomalies in a structure subjected to impact loading. The technique described in this paper may allow us not only to detect the stiffness distribution of the damaged areas but also to find locations and the extent of damage. To demonstrate the feasibility of the method, the algorithm is applied to a steel thin plate structures with an arbitrary damage shape. The results demonstrate the excellencies of the method from the standpoints of computation efficiency as well as its ability to investigate the arbitrary stiffness reductions.
Experimental Study on Application of Multi-Stepwise TPSM
Ahn, Jin-Hee ; Kim, Jun-Hwan ; Kim, Sang-Hyo ; Lee, Sang-Woo ;
Journal of the Korea institute for structural maintenance and inspection, volume 12, issue 1, 2008, Pages 91~100
Multi-stepwise Thermal Prestressing Method(TPSM) is a newly proposed prestressing method, which is combined the external prestressing method and the external bonding method. Multi-stepwise thermal prestressing force is induced by cooling process of cover-plate in the multi-stepwise temperature distribution after the cover-plate being bolted to the girder. In this study, the heating capacity test of the developed heating system for applying the multi-stepwise TPSM effectively and multi-stepwise TPSM inducing test of H-beam is performed. Also, a field test of the rhamen type temporary bridge is carried out to evaluate the effect and application of the multi-stepwise TPSM. Truck load was loaded and compared with the structure analysis results.
An Experimental Study on the Fatigue Flexural Bonding Characteristic of Concrete Beam Reinforced with GFRP Rebar
Oh, Hong Seob ; Sim, Jong Sung ; Kang, Tae-Sung ;
Journal of the Korea institute for structural maintenance and inspection, volume 12, issue 1, 2008, Pages 101~108
This study is to examine bond strength of beam reinforced with GFRP rebar under 4-point fatigue bending test by adopting BRITISH STANDARD. The variables were made to have bonding length of 5times(5db), and 15times(15db) of the nominal diameter of GFRP rebar and were done to analyze the relationship between the bonding strength and the slip. In the result of the test, pull-out failure was dominant in the 5db specimen, patterns of the pull-out failure and concrete shear failure appeared in the 15db specimen showed only concrete shear failure at the end of bonding length. Therefore, The strain development consist of three different stage : A rapid increases form 0 to about 10% of total fatigue life. A uniform increases form 10% to about 70%~90%. Then a rapid increases until failure, if failure takes place. It seems that stress level has not influence on the secant modules of elasticity. And also according to the outcome the existing strengthening method came out to be the most superiority in S-N graphs.
Adhesive Shear Strength of Carbon Fiber Sheet
Kim, Yoon-Chil ;
Journal of the Korea institute for structural maintenance and inspection, volume 12, issue 1, 2008, Pages 109~116
In order to test the adhesive capacity of carbon fiber sheet, a static loading method for bending-behavior-type beam specimens, cut in half was developed and test was conducted with compressive strength of concrete set as the test parameter. The tests were performed to prescribe adhesive shear strength based upon the result of shear failure as well as verification of testing method. First of all, the test method proved to be reliable in determining the adhesive shear strength. The test result also exhibited two types of variations in adhesive shear strength. Among two types of variations, average and minimum values for adhesive shear strength, relatively stable results, 3.41MPa and 2.11MPa, respectively. Particularity in the adhesive shear strength with respect to compressive shear strength was not found.
Development of Shape Determination Program for Suspension Bridge Using Digital Image Processing
Cheung, Jin-Hwan ; Kang, Choong-Hyun ; Kim, Nam-Shik ; Park, Yong-Myoung ;
Journal of the Korea institute for structural maintenance and inspection, volume 12, issue 1, 2008, Pages 117~126
In this paper, it is presented a digital image processing method and the program (Visual C++) to determine the shape of the suspension bridge. To investigate the precision of this method, a suspension bridge is divided into 5, 13 and 19 images, respectively, by using the 6.3M pixels digital camera with 300mm zoom lens. Obtained results of the Kwang-Ahn Grand Bridge by using this method are fairly close to the real precision surveyed data. The accuracy is more improved by increasing the number of divided images of the structure. The total cost, man power and time of field survey by this method presented in this study could be much more reduced and the developed program could be applied with little modification for other structures like cable-stayed bridges, if lens compensation algorithms and program access capabilities are improved.
A Study on Aseismatic Performance of Base Isolation Systems Using Resilient Friction Pot Bearing
Oh, Ju ; Hyeon, Gi Hwan ; Park, Yeon Su ; Park, Seong-Kyu ;
Journal of the Korea institute for structural maintenance and inspection, volume 12, issue 1, 2008, Pages 127~134
For more districted seismic design and attemped multi-bridge continuity, the existing seismic design is difficulted to treat seismic activity. So, many company applied multi-fixed point and damper or isolator, which is effective for decreasing seismic energy, on period shift, decentralization and damping. But, there is hard to design special bridge with adjusted seismic system because of absence seismic device and insufficient design experience. Therefore, the study on behavior characteristics of designed bridge with various seismic device is performed to utilize the result of this for selection of adequate seismic device.
Optimum Design of LB-DECK Plate Girder Bridge
Kim, Ki-Wook ; Park, Moon-Ho ;
Journal of the Korea institute for structural maintenance and inspection, volume 12, issue 1, 2008, Pages 135~142
This study is concerned with the optimum design of LB-Deck plate girder bridge. The optimizing problems of the composite bridge are formulated with objective functions and constraints. The objective functions are formulated as the total cost of the concrete deck and steel girder construction and the constraints are derived by criteria with respect to the Korean Highway bridge design. The optimizing algorithm using SUMT for optimum design of the Simple span, 2-Span, 3-span LB-deck plate and general RC-steel composite girder bridges (L=60m) which act live load(DB24). And their optimum numerical results are compares and analyzed to examine the possibility of optimization, the application and convergency of this optimizing algorithm.
An Experimental Study on The Behavior of Reinforced Concrete Beams with Poor-Compacted Concrete in Tensile Steel Zone
Park, Hoon-Gyu ; An, Young-Ki ; Jang, Il-Young ; Park, Byung-Hee ;
Journal of the Korea institute for structural maintenance and inspection, volume 12, issue 1, 2008, Pages 143~150
There is possibility of poor-state concrete filling condition due to segregation of aggregate and paste in reinforced concrete structure. This study was conducted to evaluate the flexural and shear behavior of reinforced concrete beams with different concrete filling conditions. Different concrete filling conditions were intentionally made such that the specimens was soundly cast to obtain the perfect concrete filling condition and cast in such a way that up to the longitudinal tensile reinforcement from the top, good concrete was filled while poor concrete was poured for the bottom part to simulate the poor strength, workability and unsatisfactory compaction. The test results indicate that have no effect of concrete filling conditions on the yielding strength of structures. But, have a great influence on the flexural ductility and shear capacity of structures.
Behaviors of RC Beams Repaired with FRP-Rod by Use of Anchoring Pin
Kim, Chung Ho ; Jang, Hee Suk ; Ko, Sin Woong ;
Journal of the Korea institute for structural maintenance and inspection, volume 12, issue 1, 2008, Pages 151~157
It is difficult for existing beams to ensure the sufficient embedding depth due to constructional cause. Owing to these problems, currently FRP-Rod embedding repair method run parallel with a section increasing method in many case. In this study, anchor pin was adopted to solving the problems of the sliding of FRP-Rod and the unified behaviors of the repaired beam without increasing the section. In the experiments, split failure of covering concrete and slippage of the FRP-Rod were not occurred. it was confirmed that FRP-Rod shown the integrate behaviors with RC beam till the repaired beams destroyed.
Analysis of Nonlinear Behavior and Reliability of PSSC Composite Girder Bridge
Hwang, Chul-Sung ; Paik, In-Yeol ;
Journal of the Korea institute for structural maintenance and inspection, volume 12, issue 1, 2008, Pages 158~166
Member force, strain and stress distribution of a section are obtained for prestressed steel and concrete(PSSC) composite bridge subjected to dead and live load in order to interpret the effect of prestressing and deformation of tendon. The stress and strain distribution and moment capacity are obtained for both noncomposite and composite section and for allowable stress limit state, yield limit state and strength limit state. Reliability analysis is conducted after assuming limit states for deflection, stress and flexural strength. Comparing that the reliability index for stress is near 0 for example section which is designed to satisfy the allowable stress exactly, the reliability indexes for deflection and flexural strength are high. Reliability of PSSC girder which is designed based on allowable stress of bridge design code is high for deflection and flexural strength.
Study on Application of Wave Travelling Effect and Local Site Effect to Design Standard for Analysing Seismic Behavior of Long-Span Cable-Stayed Bridge
Park, Youn-Soo ; Song, Young-Bong ; Hyun, Ki-Hwyun ; Lee, Soon Nam ; Yang, Won Yeol ;
Journal of the Korea institute for structural maintenance and inspection, volume 12, issue 1, 2008, Pages 167~174
Number of long-span bridge construction has been increased recently so that seismic consideration of design has become significant. To adapt such significance to design, seismic design in the newly revised 'Cable Steel Bridge Design Handbook' specifies some of wave travelling effect and local site effect. In this study, a cable-stayed bridge with main span of 500m is analysed having variables of uniform excitation, wave travelling effect, and wave travelling effect plus local site effect. Result shows that wave travelling effect in cable-stayed bridge affects considerably to its seismic response under weak soil condition even though the span length is relatively short. What's more, regardless of soil type, the seismic response has become higher for analysis with wave travelling effect and local site effect than with wave travelling effect only. Consequently, in seismic response analysis of long-span bridge, consideration should be given to application of wave travelling effect and local site effect.
Stability of Analytical Fragility Curve of Bridge on Elastic Modulus
Lee, Jong-Heon ; Kang, Shin-Yeol ; Kim, Tae-Hyeong ; Lee, Soo-Choul ;
Journal of the Korea institute for structural maintenance and inspection, volume 12, issue 1, 2008, Pages 175~182
In performing a risk analysis of structure for earthquake, it is imperative to identify the vulnerability of structures associated with various stages of damage. And the earthquake resisting capability is needed for structures like bridge. So the damage analysis of bridges with or without isolator for earthquake effects is necessary. In this paper, the risk analysis of seismic isolated LRB bridges considering earthquake effects such as PGA, PGV, SA, SV, and SI is performed using fragility curves to assure the earthquake resisting capability of the structures. And, the stability of fragility curve is investigated with respect to elastic modulus.
Experimental Evaluation of Reserve Capacities for Connection Details between Steel Pipe Pile and Concrete Footing of Type-B
Han, Sang-Hoon ; Hong, Ki-Nam ; Kwon, Yong-Kil ;
Journal of the Korea institute for structural maintenance and inspection, volume 12, issue 1, 2008, Pages 183~192
Generally, application of steel pipe pile as deep foundation member needs special requirement for the connection method between steel pipe pile and concrete footing. Even though two types of connection method are suggested in the korea highway bridge code, type-B method is prevalent. In this study, vertical, lateral, and tension loading test are done for two types of type B connection to review stress concentration, formation and behavior of imaginary RC column in the footing. Welding type and hook type as the connection method are considered in this study. Test results show that welding type have the more reserve capacity than hook type and the specimens connected by the welding type behave as the imaginary RC column in the footing. However, the specimens connected by the hook type did not behave as the imaginary RC column in the footing but behave as the hinge.
Evaluation on Strengthening Capacities and Rebound Rate of Structures with Sprayed FRP
Han, Seung-Chul ; Yang, Jun-Mo ; Yoon, Young-Soo ;
Journal of the Korea institute for structural maintenance and inspection, volume 12, issue 1, 2008, Pages 193~202
This paper investigates experimentally the confining effect, strengthening capacity and rebound rate of sprayed Fiber-Reinforced-Polymer (SFRP). From the method, resin and chopped fibers are sprayed separately from the nozzle with high pressure, and then they are attached to the concrete surface, so structure could be repaired. To evaluate the strengthening effect of sprayed FRP, cylindrical specimens and beam specimens were strengthening with SFRP. As main material of FRP, glass fiber and polyester resin are used. To investigate the optimum condition of sprayed FRP, the effects of fiber length, coating thickness, fiber volume ratio and concrete strength were examined. Capacities of sprayed FRP method were also compared to the FRP sheet method. In case of the sprayed FRP, rebound rate is important parameter considering economical efficiency and constructibility, so rebound rate of was discussed. From the test results, optimum conditions of sprayed FRP were determined. SFRP method showed superior strengthening capacities than FRP sheet method.