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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
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
Application and Usefulness of Wireless Measurement System
Kim, Yu-Seung ; Park, Soo-Yeol ; Chung, Gil-Yung ; Choi, Jun-Sung ;
Journal of the Korea institute for structural maintenance and inspection, volume 12, issue 3, 2008, Pages 3~7
Approximate Numerical Modeling of Wind Load
Kim, Yu-Seung ; Park, Soo-Yeol ; Chung, Gil-Yung ; Choi, Jun-Sung ;
Journal of the Korea institute for structural maintenance and inspection, volume 12, issue 3, 2008, Pages 8~13
Analysis on the Dynamic Characteristics Using GPS
Kim, Yu-Seung ; Park, Soo-Yeol ; Chung, Gil-Yung ; Choi, Jun-Sung ;
Journal of the Korea institute for structural maintenance and inspection, volume 12, issue 3, 2008, Pages 14~18
Sulfate Attack and Deterioration of Concrete Structures
Lee, Seung-Tae ;
Journal of the Korea institute for structural maintenance and inspection, volume 12, issue 3, 2008, Pages 19~26
The Extension and Strengthening on Exterior Garage of OOO Building
Song, Dong-Yub ; You, Young-Chan ;
Journal of the Korea institute for structural maintenance and inspection, volume 12, issue 3, 2008, Pages 27~34
Report on Evaluation of Concrete Strength by Non-Distructive Test
Kwak, Chung-Seong ; Lee, Jae-Hyong ;
Journal of the Korea institute for structural maintenance and inspection, volume 12, issue 3, 2008, Pages 35~40
Development of Bridge Design Guidelines in Kangwondo Mountain Area
Kim, Tae Nam ;
Journal of the Korea institute for structural maintenance and inspection, volume 12, issue 3, 2008, Pages 63~70
The purpose of this study is development of bridge design guidelines in Kangwondo mountain area. Much damages heve been wrought by Typhoon Rusa(2002), Maemi(2003), Ewinniar(2006) and severe rain storm in July 2006 in Kangwondo mountain area. The partial cause of these much damages are not consider the regional and geomorphologic condition of river in Kangwondo mountain area. Most of the bridge damages were caused by severe wash out the foundation of pier and abutment. As other reasons, dead trees, branches of the trees and floating materials were catched by pier and deck which make difficult or cut off the flow. Design guidelines are presented by analysis the types and reasons of damages of the disaster.
Review of the Current infrared Thermorgraphy Techniques for Detecting Defects in Civil Structures
Sim, Jungi ; Zi, Goangseup ; Park, Jin-Hyung ; Cho, Hyo-Nam ; Lee, Jong Seh ;
Journal of the Korea institute for structural maintenance and inspection, volume 12, issue 3, 2008, Pages 71~83
In this paper, the basic principle, the application and the limitation of Infrared thermography technique to detect defects in different kinds of concrete structures are reviewed. Considered are voids beneath the concrete surface with experiments, delamination between concrete surface and fiber reinforced polymer sheet, the deterioration of steel bars in reinforced concrete, surface defects in historical buildings, pavements, bridges, and railway track graves. As a result, we conclude that infrared thermography methods are useful for fast detecting defects; however, they are influenced by environmental factors, specially temperature. Therefore it is recommended to use the infrared thermography technique with other NDT equipments to expect better result.
Flexural Capacity of Concrete Beam Strengthened with Near-Surface Mounted Carbon Fiber Reinforced Polymer
Oh, Hong Seob ; Sim, Jong Sung ; Ju, Min Kwan ;
Journal of the Korea institute for structural maintenance and inspection, volume 12, issue 3, 2008, Pages 84~92
This study is to investigate the flexural performance of Near Surface Mounted (NSM) strengthening method using Fiber reinforced Polymer (FRP) materials to concrete structures. For this study, the inverse-shaped trapezoid CFRP composite material which has been registered as New Excellent Technology (NET) 351 was adopted to the concrete structure. In this study, two types of the CFRP types were considered; Type A (
) and Type B (
) with different strengthening ratio. In the result of the test, it was proved that NSM strengthened specimens had more flexural performance of 20-100% than that of the unstrengthened specimen. With this test result, the structural efficiency was investigated based on the coefficient of ductility and coefficient of crack resistance.
Experimental Verification of Reinforced Concrete Beam with FRP Rebar
Oh, Hong Seob ; Ahn, Kwan-Yeol ;
Journal of the Korea institute for structural maintenance and inspection, volume 12, issue 3, 2008, Pages 93~100
The use of fiber reinforced polymer (FRP) composites is significantly growing in construction and infrastructure applications where durability under harsh environmental conditions is of great concern. In order to examine the applicability of FRP rebar as a reinforcement in flexural member, flexural tests were conducted. 12 beams with different FRP materials such as CFRP, GFRP and Hybrid FRP and reinforcement ratio were tested and analyzed in terms of failure mode, moment-deflection, flexural capacity, ductility index and sectional strain distribution. The test results were also compared with the theoretical model represented in ACI 440.1R06. Test results indicate that the flexural capacity of the beams reinforced by FRP bars can be accurately predicted using the ultimate design theory. They also show that the current ACI model for computing the deflection overestimates the actual deflection of GFRP series and underestimates the deflection of CFRP series.
The Effect of Steel Fiber on the Compressive Strength of the High Strength Steel Fiber Reinforced Cementitious Composites
Kang, Su-Tae ; Kim, Sung-Wook ; Park, Jung-Jun ; Koh, Gyung-Taek ;
Journal of the Korea institute for structural maintenance and inspection, volume 12, issue 3, 2008, Pages 101~109
Many researchers have reported that adding steel fiber to concrete improved its tensile and flexural strength significantly, but relatively few studies have been made on the compressive behavior of steel fiber-reinforced concrete. It is still less in case of high strength steel fiber-reinforced cementitious composites(SFRC). The main objective of this research is to examine the effect of adding steel fiber on the compressive strength of high strength SFRC using fiber reinforcing index(RI,
). It was found from the study that compressive strength was noticeably increased in proportion to RI. In conclusion, the relationship between Reinforcing Index(RI) and compressive strength in case of high strength steel fiber-reinforced cementitious composites was suggested.
Behavior According to Confinement of Compressive Concrete on Flexural Members Reinforced with FRP Bars
Seo, Dae-Won ; Han, Byum-Seok ; Shin, Sung-Woo ;
Journal of the Korea institute for structural maintenance and inspection, volume 12, issue 3, 2008, Pages 110~118
The use of FRP bar as reinforced concrete beams is considered as one of the most prominent solution that may overcome the corrosion of reinforcing steel bars. However, in the case of FRP reinforced concrete, both the reinforcing and the reinforced materials are brittle. For this reason, ductility of structures with FRP reinforcement is much less than that of structures with steel reinforcements. In this study, a method has been suggested to provide a meaningful quantification of ductility for concrete beams reinforced with FRP bars. This paper shows which the confinement to the compression concrete by the spiral can increase the ductility of FRP over-reinforced concrete beams.
Experimental Study on Compressive Strength of Concrete Column Retrofitted by Carbon FRP Sheet
Yoo, Youn-Jong ; Lee, Kyoung-Hun ; Kim, Heecheul ; Lee, Young-Hak ; Hong, Won-Kee ;
Journal of the Korea institute for structural maintenance and inspection, volume 12, issue 3, 2008, Pages 119~126
In 1980 and 1990's most of residential buildings were constructed with relatively low strength concrete of 18 MPa. And, columns were designed considering only vertical loads. In this study, compressive strength tests for low strength RC columns retrofitted by carbon fiber sheets were carried out. Carbon fiber sheet provides constructability and high tensile strength as well as good corrosion resistance characteristics. A pair of carbon sheets were wrapped with
angle with respect to longitudinal direction of RC column to increase structural capacity against axial and lateral load simultaneously. Strength and strain patterns and failure modes of specimens were analyzed and prediction equation of increased compressive strength of RC column confined by carbon fiber sheet was proposed based on regression analysis.
Response Analysis of PSC-I Girder Bridges for Vehicle's Velocity
Park, Moon-Ho ; Kim, Ki-Wook ;
Journal of the Korea institute for structural maintenance and inspection, volume 12, issue 3, 2008, Pages 127~134
The response of a bridge can be influenced by span length, bridge's surface condition, vehicle's weight, and vehicle's velocity. It is difficult to predict accurate behavior of a bridge. In the current standard of specifications, such dynamic effect is defined by impact factor and prescribed to consider live load as to increase design load by means of multiplying this value by live load. However, it is not well understood because the Impact factor method differs from every country. Dynamic, static and pseudo-staitic field loading tests on PSC-I girder bridges were carried out to find out the dynamic property of the bridge. This paper is aimed to figure out actual dynamic property of the bridge by using field loading test. An empirical method based on impact factor is widely used and also argued. Displacement and strain response measured from the tests was compared with one from the empirical method. The former seems to be reasonable since it can consider actual response of a bridge through field tests.
Regarding a Shear Strengthening of an Epoxy Mortar Panel for RC Beam Without Shear Strengthening Reinforcing Bar
Lee, Sang-Ho ; Cho, Min-Su ; Heo, Jae-Sang ;
Journal of the Korea institute for structural maintenance and inspection, volume 12, issue 3, 2008, Pages 135~146
In this study, the effect of epoxy mortar panel as the shear strengthening material of reinforced concrete beam is investigated by loading test. The main variables are the kind of strengthening material, the amount of reinforcement and the spacing of CFS(Carbon Fiber Sheet) stirrups. The design method to use epoxy mortar panel as shear strengthening of reinforced concrete beam took the shear capacity as the form of the sum of
. By making a comparison between the values calculated by the proposed shear strength prediction formula and those from the loading test results, the mean value was 1.10 and the standard deviation was 8.16%.
Assessment of Shear Strength Parameter for Weathered Soils Using Artificial Neural Network
Lee, Moo-Cheol ; Lee, Song ;
Journal of the Korea institute for structural maintenance and inspection, volume 12, issue 3, 2008, Pages 147~154
Weathered soil slope loses its shear strength if it is exposed in the air for a long time or in contact with water. And this kind of strength loss is remarkable in dam slope which has very big difference in water level according to the season. In this study, shear strength loss of weathered soil due to saturation had been found out through dryness and wetness repetition direct shear test. Also relation between penetration blow number(Nc) and shear strength parameter had been found out through small sized dynamic cone penetration test device and the correlation equation of Nc had been proposed through artificial neural network analysis to estimate shear strength parameter easily.
The Evaluation for Stability at Joint Part in Composition Dam
Kim, Jae-Hong ; Oh, Byung-Hyun ;
Journal of the Korea institute for structural maintenance and inspection, volume 12, issue 3, 2008, Pages 155~166
Research dam is consisted of concrete gravity dam that right bank department is built to concrete material, left bank department is composition dam that is consisted of rockfill dam that consist of rockfill material In domestic case, composition dam form of storage of water facilities of about 17,000 does not exist hardly in dam of irrigation water industry drinking water purpose that manage local government or other institution, Even if exist, is real condition that there is total nonexistence administrator fare of facilities, Choose unique dam of domestic multipurpose dam and analyzed conduct special quality of con'c gravity dam and rockfill dam joint part To analyze dynamic conduct special quality of composition dam by analytic method in this research, Do modelling via axis of dam and achieved static(Psuedo-static, modify Psuedo-static) and dynamic analysis, When achieving earthquake response analysis, analyzed seismic response analysis between concrete part and rockfill's part.
A Study on the Structural Behavior of LB-DECK Panel Considering Rebar-Arrangement in Site
Lho, Byeong-Cheol ; Cho, Gyu-Dae ;
Journal of the Korea institute for structural maintenance and inspection, volume 12, issue 3, 2008, Pages 167~174
The objective of this study is to verify whether the composite action is sufficiently strong to withstand at the interface and the structural behavior of LB-DECK panel with field concrete slab strengthened with main reinforcing bars. Static and fatigue tests are performed for LB-DECK panels with varied shapes and amounts of rebars, and the results are compared with those of field concrete panel(FCP). The test results indicate that the LB-DECK panel with 1.5 times of more rebars inside significantly increase the overall stiffness. LB-DECK penel usually shows on average 52.1 percent of improved stiffness compared with the FCP. The fatigue test results also show that the LB-DECK panel can withstand two-million cycles of repeated loads without any damage.
Probabilistic Safety Analysis of Cable-Stayed Bridge Using Measured Data
Yoon, Man-Geun ; Cho, Hyo-Nam ;
Journal of the Korea institute for structural maintenance and inspection, volume 12, issue 3, 2008, Pages 175~182
In this paper, through the study and consideration of the recently prominent monitoring of cable stayed-bridge, practical but reasonable suggested for the evaluation of the probabilistic safety of the bridges using probable measured data from monitoring measurement system. It is shown in the paper that the live load effects can be evaluated using measured data of cable-stayed bridge and this the realistic probabilistic safety of the cable-stayed bridge could be assessed in term of element reliability and system reliability. As a practical method for the evalution of the system reliability of system cable-stayed bridges partial ETA method is uesd, which can find the critical failure path including combined failure modes of cable, deck and pylon. Compared with the conventional safety analysis method, the propsed approach may be considered as the practical method that shows the considerably actual and reasonable results the system redundancy of the structure.
A Study for Tunnel Management System Development Using a Tunnel Scanner
Yoon, Tae-Gook ; Lee, Song ;
Journal of the Korea institute for structural maintenance and inspection, volume 12, issue 3, 2008, Pages 183~190
The maintenance and management of each tunnel has been individually performed in depending on service, management agency, and tunnel size. The maintenance and management system for the existing tunnel consists of simple tunnel card and the computerization of basic tunnel data, now. There is not the systemic maintenance and management system for tunnel. Therefore, it has been impossible the systemic maintenance and management for tunnel due to loss of data obtained from each step, such as, plan, design, construction, or maintenance, with time. The objective of this study is to build the database system in combing the results of tunnel scanning with all data obtained from plan, design, construction, or maintenance step.
Pot Life of Structural Adhesives for FRP Composite Used in Strengthening RC Members
Choi, Ki-Sun ; You, Young-Chan ; Kim, Keung-Hwan ;
Journal of the Korea institute for structural maintenance and inspection, volume 12, issue 3, 2008, Pages 191~198
Pot life of two-component adhesives such as epoxy resin used in saturating FRP composite is defined as a certain time periods which can guarantee the bond performance and workability of epoxy resin. Therefore, adhesion procedure in strengthening RC members should be completed before chemical hardening is going on at job site. It has been known that there are two types of test method to evaluate the pot life of structural adhesive based on apparent viscosity or temperature change. This study is to verify the test methods how to assess pot life of structural adhesive for FRP composites by means of changing in apparent viscosity and means of exothermic reaction temperature proposed in existing test standards. Results of each test method were compared and analyzed, and reasonable test and evaluation method were suggested.
A Study Using Rebound Method and Impact Echo Method for the Comparison of the Compressive Strength of Concrete Slab
Hong, Seong-Uk ; Cho, Young-Sang ;
Journal of the Korea institute for structural maintenance and inspection, volume 12, issue 3, 2008, Pages 199~207
As infrastructures are being deteriorated, nondestructive evaluation of existing structures and construction quality control are increasingly demanded. The importance of predicting compressive strength of concrete structure is also gradually increasing in construction industry. The estimation of concrete compressive strength is a critical factor of the construction management and quality control. This study has been conducted using Schmidt hammer test and Impact echo method, which are nondestructive test methods for the comparison of the concrete compressive strength. It is focusing to examine the relationship between compressive strength of concrete and rebound number by Schmidt hammer test result by Impact echo method. It was found that concrete compressive strength and rebound number have a close correlation.