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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 18, Issue 6 - Nov 2014
Volume 18, Issue 5 - Sep 2014
Volume 18, Issue 4 - Jul 2014
Volume 18, Issue 3 - May 2014
Volume 18, Issue 2 - Mar 2014
Volume 18, Issue 1 - Jan 2014
Selecting the target year
Improvement of Structural Performance of RC Beams retrofitted Hybrid Fiber using Recycled Coarse Aggregate and Ground Granulated Blast Furnace Slag
Yi, Dong-Ryul ; Ha, Gee-Joo ;
Journal of the Korea institute for structural maintenance and inspection, volume 18, issue 6, 2014, Pages 1~10
DOI : 10.11112/jksmi.2014.18.6.001
In this study, thirteen reinforced concrete beams, ground granulated blast furnace slag, replacing recycled coarse aggregate with PVA fiber (BSPG series) and recycled coarse aggregate with hybrid fiber (
series), and standard specimen (BSS) were constructed and tested under monotonic loading. Experimental programs were carried out to improve and evaluate the Structural performance of such test specimens, such as the load-displacement, the failure mode, and the maximum load carrying capacity. All the specimens were modeled in 1/2 scale-down size. Test results showed that test specimens (
series) was increased the compressive strength by 13%, the maximum load carrying capacity by 4~21% and the ductility capacity by 4~28% in comparison with the standard specimen (BSS). And the specimens (
series) showed enough ductile behavior and stable flexural failure.
Analysis on the Elastic Shear Buckling Characteristics of Corrugated Steel Plate in Accordance with Corrugation Shape
Shon, Su-Deok ; Yoo, Mi-Na ; Lee, Seung-Jae ;
Journal of the Korea institute for structural maintenance and inspection, volume 18, issue 6, 2014, Pages 11~20
DOI : 10.11112/jksmi.2014.18.6.011
This paper aims at comparing and analyzing shear buckling characteristics between sinusoidal corrugation shape and trapezoidal one. For this, I adopted the equal-length trapezoidal corrugation and sinusoidal one for the analytical models, and analyzed their shear buckling characteristics through linear buckling analysis and on its theory. Generally, the shear buckling shapes of corrugated steel plates are classified into local buckling, global buckling, and interactive buckling from the two buckling modes. Sinusoidal corrugation shape, unlike trapezoidal corrugation, does not have flat sides, which causes another tendency in shear buckling mode. Especially, the changes and different aspects of shear buckling on the boundary between local buckling and global buckling appear in different corrugation shapes. According to the analysis results, interactive buckling mode appeared on the boundary of local buckling and global bucking in trapezoidal corrugation. However, in the case of corrugated steel plates with sinusoidal configuration, interactive buckling mode appeared in the part where global bucking takes place. Besides, trapezoidal shapes are of advantages on shear buckling resistance in the local buckling section, and so are sinusoidal shapes in the global buckling section.
An Experimental Study on the Bonding Characteristic of Steel Tubular Joint Connection filled with Fiber Reinforced High Performance Cementeous Grout
Oh, Hong-Seob ; Seo, Gyo ; Kim, Sang-Hyeon ; Ko, Sang-Jin ; Lee, Hyeon-Gi ;
Journal of the Korea institute for structural maintenance and inspection, volume 18, issue 6, 2014, Pages 21~29
DOI : 10.11112/jksmi.2014.18.6.021
This paper deals with the bonding characteristic of grouted joint connections of monopile support structures for offshore wind power facilities. For the integration of pile connection of wind power supporting structure, fiber reinforced high performance cementeous grout was developed and the ultimate compressive strength of it is 125MPa and the direct tensile strength is 7.5 MPa at 7 days. To assess the bond strength of grout filled in pile connection, small scaled direct bond tests under axially loaded was performed and analyzed according the existing guidelines. The fiber volume fraction (0%, 0.5% and 0.9%), aspect ratio of fiber (60 and 80) and the ratio of height to spacing of shear key (0.013 and 0.056) were adopted as the experimental variables. From the test results, the maximum bond strength among the all specimens was 30.8MPa and the bond strength of grouted connection was affected by the ratio of height to spacing of shear key than the fiber volume fraction.
Probabilistic Estimation of Service Life of Box Culvert for Power Transmission Considering Carbonation and Crack Effect
Woo, Sang-Kyun ; Lee, Yun ;
Journal of the Korea institute for structural maintenance and inspection, volume 18, issue 6, 2014, Pages 30~40
DOI : 10.11112/jksmi.2014.18.6.030
The demand of underground structure such as box culvert for electric power transmission is increasing more and more, and the service life extension of these structures is very important. Recent observations in field and experimental evidences show that even steel in concrete can be corroded by carbonation reaction of cover concrete. Carbonation-induced corrosion in concrete may often occur in a high carbon dioxide environment. In this study, the risk of carbonation of box culverts in our nation was evaluated by measuring the carbonation rate and concrete cover depth in field. Then, the service life due to carbonation at the cover depth was calculated by in situ information and the Monte Carlo simulation in a probabilistic way. Additionally, the accelerated carbonation test for the cracked beam specimen was executed and the crack effect owing to the carbonation process on the service life of box culvert was numerically investigated via Monte Carlo simulation based on the experimental results.
An Experimental Study on Splitting Bond Strength of RC Column Reinforced with External Steel-Band
Kim, Chang-Sik ; Yoon, Seung-Joe ; Ho, Seung-Woong ; Yoon, Pil-Joong ;
Journal of the Korea institute for structural maintenance and inspection, volume 18, issue 6, 2014, Pages 41~49
DOI : 10.11112/jksmi.2014.18.6.041
In order to investigation splitting bond strength of the deformed longitudinal reinforcing bars in the R C members strengthened laterally with the external steel-band, a total 9 sets of test re-bars with and without active confining force given by the external steel-band are pulled monotonically until failure. Test results indicate that the bond strength becomes higher with the increase in number of steel-band sets and their initial stress magnitude. This is due to the active confining force given by the steel-band, and passive confining forces given by the steel-band and transverse reinforcements, in which the passive confinement effect varies depending on the magnitude of active confining force. An equation to estimate the splitting bond strengths for the R C members strengthened laterally with the external steel-band is developed based on the several experimental results of the present study.
Stability Analysis of Multi-Functional Fishway with Underground Passage
Lee, Young-Jae ;
Journal of the Korea institute for structural maintenance and inspection, volume 18, issue 6, 2014, Pages 50~59
DOI : 10.11112/jksmi.2014.18.6.050
In this paper, Reinforced concrete (R/C) and R/C+steel plate concrete slab was carried out by SAP2000 software program in order to compare the stability of the multi-functional fishway, that is Bonggok fishway, built at Bonggok river recently in Gumi city, when the size of underground passage is
and the velocity is 0.8m/s, 1.2m/s, 1.6m/s respectively for the S2 (R/C+S/C). The analysis shows the maximum stress of S2 decreases less 26~50% than that of Bonggok, bending moment of sidewall decreases less 28~54%, maximum stress of side wall decreases less 17~31%, bending moment of upper slab decreases less 24~47%, maximum stress of upper slab decreases less 4~20%, and bending moment decreases less 10~27% than that of Bonggok. The complementation is required as much as the following percent; 27% and 25% for the maximum stress and bending moment of underground passage, 15% and 24% for the side wall maximum stress and bending moment, and 10% and 14% for the upper slab maximum stress and bending moment, respectively. This result shows that the S2 is greatly superior to that of the Bonggok fishway, and underground passage size of
is superior to that of
, and R/C+S/C slab is superior to that of R/C slab. This result is expected to be the basic data for the construction and design of the multi-functional fishway.
Abnormal Response Analysis of a Cable-Stayed Bridge using Gradual Bilinear Method
Kim, Byeong-Cheol ; Park, Ki-Tae ; Kim, Tae-Heon ; Hwang, Ji-Hyun ;
Journal of the Korea institute for structural maintenance and inspection, volume 18, issue 6, 2014, Pages 60~71
DOI : 10.11112/jksmi.2014.18.6.060
Cable-stayed bridge, which is one of the representative long-spanned bridge, needs prompt maintenances when a stay cable is damaged because it may cause structural failure of the entire bridge. Many researches are being conducted to develop abnormal behavior detection algorithms for the purpose of shortening the reaction time after the occurrence of structural damage. To improve the accuracy of the damage detection algorithm, ample observation data from various kinds of damage responses is needed. However, it is difficult to measure an abnormal response by damaging an existing bridge, numerical simulation can be an effective alternative. In most previous studies, which simulate the damage responses of a cable-stayed bridge, the damages has been considered as a load variation without regard to its stiffness variation. The analyses of using these simplification could not calculate exact responses of damaged structure, though it may reserve a sufficient accuracy for the purpose of bridge design. This study suggests Gradual Bilinear Method (GBM) which simulate the damage responses of cable-stayed bridge considering the stiffness and mass variation, and develops an analysis program. The developed program is verified from the responses of a simple model. The responses of a existing cable-stayed bridge model are analyzed with respect to the fracture delay time and damage ratio. The results of this study can be used to develop and verify the highly accurate abnormal behavior detection algorithm for safety management of architecture/large structures.
Evaluation of Structural Behavior of Reinforced Concrete Exterior Beam-Column Joints with High-Strength Concrete
Lee, Bum-Sik ; Kim, Kyung-Duk ; Kim, Sang-Woo ; Kim, Kil-Hee ; Lee, Jung-Yoon ;
Journal of the Korea institute for structural maintenance and inspection, volume 18, issue 6, 2014, Pages 72~81
DOI : 10.11112/jksmi.2014.18.6.072
This paper reports the test results of reinforced concrete exterior beam-column joints with high-strength concrete. The main parameters of eight specimens were joint failure modes, the compressive strength of concrete, and the head shapes of steel bars. All specimens were designed according to ACI 352R-02 design recommendations. Two types of failure modes were considered; J-failure and BJ-failure. The longitudinal steel bars were anchored by 90 degree standard hooks or headed reinforcement. Experimental results indicated that the current ACI design recommendation limited by the compressive strength of concrete somewhat underestimated the strength of beam-column joints with high-strength concrete. In the specimens showed joint shear failure, the strength of beam-column joints with headed bars was approximately 10 percent higher than that of joints with 90 degree standard hooks.
Maturity-Based Model for Concrete Compressive Strength with Different Supplementary Cementitious Materials
Mun, Jae-Sung ; Yang, Keun-Hyeok ; Jeon, Yong-Soo ;
Journal of the Korea institute for structural maintenance and inspection, volume 18, issue 6, 2014, Pages 82~89
DOI : 10.11112/jksmi.2014.18.6.082
The purpose of this study is to propose a simple model to evaluate the compressive strength development of concrete with various supplementary cementitious materials (SCMs) and cured under different temperatures. For the generalization of the model, the ACI 209 parabola equation was modified based on the maturity function and then experimental constants A and B and 28-day compressive strength were determined from the regression analysis using a total of 265 data-sets compiled from the available literature. To verify the proposed model, concrete specimens classified into 3 Groups were prepared according to the SCM level as a partial replacement of cement and curing temperature. The analysis of existing data clearly revealed that the 28-day compressive strength decreases when the curing temperature is higher and/or lower than the reference curing temperature (
). Furthermore, test results showed that the compressive strength development of concrete cured under
until an early age of 3 days was marginally affected by the curing temperature afterward. The proposed model accurately predicts the compressive strength development of concrete tested, indicating that the mean and standard deviation of the ratios between predictions and experiments are 1.00 and 0.08, respectively.
Influence of Chloride Content of on Electrical Resistivity in Concrete
Yoon, In-Seok ; Nam, Jin-Won ;
Journal of the Korea institute for structural maintenance and inspection, volume 18, issue 6, 2014, Pages 90~96
DOI : 10.11112/jksmi.2014.18.6.090
The electrical resistivity of concrete can be related to two processes involved in corrosion of reinforcement: initiation (chloride penetration) and propagation (corrosion rate). The resisistivity of concrete structure exposed to chloride indicates the risk of early corrosion damage, because a low resistivity is related to rapid chloride penetration and to high corrosion rate. Concrete resistivity is a geometry-independent material property that describes the electrical resistance, which is the ratio between applied voltage and resulting current in a unit cell. In previous study, it was realized that the resistivity of concrete depended on the moisture content in the concrete, microstructural properties, and environmental attack such as carbonation. The current is carried by ions dissolved in the pore liquid. While some data exist on the relationship between moisture content on electrical resistivity of concrete, very little research has been conducted to evaluate the effect of chloride on the conduction of electricity through concrete. The purpose of this study is to examine and quantify the effect of chloride content on surface electrical resistivity measurement of concrete. It was obvious that chloride content had influenced the resistivity of concrete and the relationship showed a linear function. That is, concrete with chloride ions had a comparatively lower resistivity. Decreasing rate of resistivity of concrete was clear at early time, however, after 50 days resistivity was constant irrespective of chloride concentration. Conclusively, this paper suggested the quantitive solution to depict the electrical resistivity of concrete with chloride content.
Shear Performance Analysis of One-way Hollow Slab According to Shear Reinforcement
Yoon, Sung-Wook ; Seok, Keun-Young ; Kim, Gee-Cheol ; Kang, Joo-Won ;
Journal of the Korea institute for structural maintenance and inspection, volume 18, issue 6, 2014, Pages 97~104
DOI : 10.11112/jksmi.2014.18.6.097
Hollow slab is a floor system which reduces the load of vertical structural members and earthquake load by decreasing self-weight of slab. Although hollow slab can reduce self-weight of slab remarkably, flexural strength and shear strength reduce due to the hollow section inside the slab, so it is very important to predict structural behavior. In spite of plenty of domestic and foreign studies on hollow slab, there is a shortage of research on shear performance according to shear reinforcement of one-way hollow slab. Therefore, this study aims to verify the need for shear reinforcement of one-way hollow slab by analyzing failure modes of one-way hollow slab depending on the state of shear reinforcement and comparing shear strengths of estimation formula and experimental value with one another.
Reset of Measurement Control Criteria for Monitoring Data through the Analysis of Measured Data
Chung, Chul-Hun ; An, Ho-Hyun ; Shin, Soo-Bong ; Kim, Yu-Hee ;
Journal of the Korea institute for structural maintenance and inspection, volume 18, issue 6, 2014, Pages 105~113
DOI : 10.11112/jksmi.2014.18.6.105
Most operating civil structures measure response data continuously by various types of sensors and evaluate their health conditions. Measurement control criteria for such civil structures are usually defined in the first operating stage by experts working at a construction or engineering company. However, a few studies have been carried to examine the adequacy of these measurement control criteria based on the actual measured data. The paper introduces a systematic way of resetting the measurement control criteria for the measured monitoring data based on the statistical aspects of the measured data. The proposed statistical approach has been examined with actually measured time-history data from a bridge structure.
Performance Based Evaluation of Concrete Material Properties from Climate Change Effect on Temperature and Humidity Curing Conditions
Kim, Tae-Kyun ; Shin, Jae-Ho ; Shin, Dong-Woo ; Shim, Hyun-Bo ; Kim, Jang-Ho Jay ;
Journal of the Korea institute for structural maintenance and inspection, volume 18, issue 6, 2014, Pages 114~122
DOI : 10.11112/jksmi.2014.18.6.114
Currently, global warming has become a serious problem arising from the usage of fossil fuels such as coal and petroleum. Moreover, due to the global warming, heat wave, heavy snow, heavy rain, super typhoon are frequently occurring all over the world. Due to these serious natural disasters, concrete structures and infrastructures are seriously damaged or collapsed. In order to handle these problems, climate change oriented construction technology and codes are necessary at this time. Therefore, in this study, the validity of the present concrete mixture proportions are evaluated considering temperature and humidity change. The specimens cured at various temperature and humidity conditions were tested to obtain their compressive and split tensile strengths at various curing ages. Moreover, performance based evaluation (PBE) method was used to analyze the satisfaction percentage of the concrete cured at various condition. From the probabilistic method of performance evaluation of concrete performance, feasibility and usability can be determined for future concrete mix design.
Vision-Based Displacement Measurement System Operable at Arbitrary Positions
Lee, Jun-Hwa ; Cho, Soo-Jin ; Sim, Sung-Han ;
Journal of the Korea institute for structural maintenance and inspection, volume 18, issue 6, 2014, Pages 123~130
DOI : 10.11112/jksmi.2014.18.6.123
In this study, a vision-based displacement measurement system is developed to accurately measure the displacement of a structure with locating the camera at arbitrary position. The previous vision-based system brings error when the optical axis of a camera has an angle with the measured structure, which limits the applicability at large structures. The developed system measures displacement by processing the images of a target plate that is attached on the measured position of a structure. To measure displacement regardless of the angle between the optical axis of the camera and the target plate, planar homography is employed to match two planes in image and world coordinate systems. To validate the performance of the present system, a laboratory test is carried out using a small 2-story shear building model. The result shows that the present system measures accurate displacement of the structure even with a camera significantly angled with the target plate.
A Study on Plant Certification Program for Precast Concrete Products
Kim, Hyoung-Do ; Lee, Sang-Sup ; Park, Keum-Sung ; Bae, Kyu-Woong ;
Journal of the Korea institute for structural maintenance and inspection, volume 18, issue 6, 2014, Pages 131~138
DOI : 10.11112/jksmi.2014.18.6.131
The steel structure fabrication plant certification program was enacted as a part of the construction technology management act, article 24-3, to improve the quality of steel construction after the decay falling accident of Seongsu Bridge in 1994. However, the national certification program for structural precast concrete that is a prefabricated construction products produced by casting concrete in plant is not implemented yet. So, to introduce the proper certification system for precast concrete, the quality certification programs of North America, Europe and Japan are surveyed. In North America, the organizations that manage the plant certification programs are PCI, NPCA, CPCI and so on. Sales of precast concrete elements in Europe are governed by the construction products regulation 305/2011. Therefore, CE marking is mandatory from July 2013 for all construction products including precast concrete. In Japan, precast concrete products used in civil engineering are certificated by JIS mark, product certification system and plants for manufacturing precast concrete building elements are audited by Japan Prefabricated Construction Suppliers and Manufacturers Association. Based on these survey studies, in this paper is described an adaptation of precast concrete plant certification to comport with the certification system in Korea.
Evaluation of Structural Behavior and Serviceability on Transverse Connection for Modular Slab Bridge System
Choi, Jin-Woong ; Lee, Sang-Seung ; Park, Sun-Kyu ; Hong, Sung-Nam ;
Journal of the Korea institute for structural maintenance and inspection, volume 18, issue 6, 2014, Pages 139~146
DOI : 10.11112/jksmi.2014.18.6.139
Recently, in field of bridge construction, modular technology has been studied to reduce construction period, traffic impact and environmental impact. This study is a part of research related to the modular bridges. The aim of the study is to analyze the structural behavior and evaluate a serviceability for transverse connection of modular slab bridge. A total of four specimens were fabricated. including a control beam for finding the maximum load by static test. And one control beam and two segmental beams were fabricated for cyclic loading test. As the test result, the beams that were introduced 100% of the design prestressing force showed a smaller maximum deflection, residual deflection and crack width than the control beam. The beam for serviceability evaluation was satisfied with structural serviceability limits of the deflection and crack.
Distribution of Natural Frequency of 2-DOF Approximate Model of Stay Cable to Reduction of Area
Joe, Yang-Hee ; Lee, Hyun-Chol ;
Journal of the Korea institute for structural maintenance and inspection, volume 18, issue 6, 2014, Pages 147~154
DOI : 10.11112/jksmi.2014.18.6.147
The cable damages of the bridge structures induce very important impact on the structural safety, which implies the close monitoring of the cable damage is required to secure sustained safety of the bridges. Most usual available maintenance techniques are based on the monitoring the change of the natural frequency of the structures by damages. However, existing method are based on vibration method to calculate lateral vibration and system identification can calculate the axial stiffness using sensitivity equation by trial error method. But the frequency study by the longitudinal movement need because of the sag effect in system identification. This study proposes a new method to investigate the damage magnitudes and status. The method improves the accuracies in the magnitudes and status of damages by adopting the natural frequency of longitudinal movement. The study results have been validated by comparing them with the approximate solution of FEM. Thus, the relationship of cable damage and frequency appear with relation that the severe damage has the little frequency. If we know the real frequency we can estimate the cable damage severity using this relationship. This method can be possible the efficient management of the cable damage.