Go to the main menu
Skip to content
Go to bottom
REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Journal of The Korean Society of Civil Engineers
Journal Basic Information
Journal DOI :
Korean Society of Civil Engeneers
Editor in Chief :
Volume & Issues
Volume 18, Issue 3_6 - Nov 1998
Volume 18, Issue 2_6 - Nov 1998
Volume 18, Issue 1_6 - Nov 1998
Volume 18, Issue 3_5 - Sep 1998
Volume 18, Issue 2_5 - Sep 1998
Volume 18, Issue 1_5 - Sep 1998
Volume 18, Issue 3_4 - Jul 1998
Volume 18, Issue 2_4 - Jul 1998
Volume 18, Issue 1_4 - Jul 1998
Volume 18, Issue 3_3 - May 1998
Volume 18, Issue 2_3 - May 1998
Volume 18, Issue 1_3 - May 1998
Volume 18, Issue 3_2 - Mar 1998
Volume 18, Issue 2_2 - Mar 1998
Volume 18, Issue 1_2 - Mar 1998
Volume 18, Issue 3_1 - Jan 1998
Volume 18, Issue 2_1 - Jan 1998
Volume 18, Issue 1_1 - Jan 1998
Selecting the target year
Dynamic Analysis on the Flow-induced Vibration of Tainter Gate due to Bottom Shape
Lee, Seong-Haeng ; Jung, Kyoung-Sup ; Koo, Bong-Kuen ; Kim, Kyoung-Ho ;
Journal of The Korean Society of Civil Engineers, volume 18, issue 1_4, 1998, Pages 399~399
A fluid analysis and transient dynamic analysis were performed for tainter gate to find out a proper bottom shape of gate and to investigate the dynamic behaviors. In the fluid analysis with 'F0' and 'F1' type models which were tested at previous study, the distribution of pressure and velocity were analyzed with time step in each model. In the structural dynamic analysis, firstly natural frequencies were analyzed to examine the dynamic characteristics of tainter gate and external force terms converted from the computed pressure were applied to the structural analysis models in order to compute acceleration. The computed acceleration was compared with that measured in the scale model test. In this paper, the bottom geometries of gate to reduce the amplitudes of vibration were proposed, and the dynamic behaviors of tainter gate due to bottom geometry were discussed.
Lapped Splices in High-strength Concrete Flexural Members
Kim, Jun-Seong ; Kim, Dae-Joong ; Son, Young-Hyun ; Kim, Woo ;
Journal of The Korean Society of Civil Engineers, volume 18, issue 1_4, 1998, Pages 411~411
An experimental study was conducted to evaluate the bond performance of reinforcing bars embedded in high-strength concrete. Ten beam splice specimens using concrete with compressive strength of
were fabricated and loaded up to failure to explore the applicability of the current code provisions to the structures made of high-strength concrete. The effect of the placement of stirrups on lap splice length was also studied. The test results showed that the current trend in concrete specification of making the splice length longer to compensate for having smaller cover and spacing for the structures with high-strength concrete may not be an effective approach, and supplement of a proper amount of transverse reinforcement will be a better approach than the current specification approach.
Optimum Design of Framed Structural System with Combination of Different Composite Cross-sections
Park, Moon-Ho ; Yun, Young-Mook ; Kim, Ki-Wook ;
Journal of The Korean Society of Civil Engineers, volume 18, issue 1_4, 1998, Pages 423~423
In this study, an optimum design model for composite framed structures with cross-section combinations is developed. Constraint equations are derived based on the LRFD 1994 Code requirements. They are the equations for flexural moment, neutral axis, column stability, local buckling, axial strength, and cross sectional shapes of members. A dimensionless function representing steel and concrete costs is taken as the objective function. The sequential unconstrained minimization technique transforming the nonlinear optimization problem with multi-design variables and constraints into the unconstrained minimization problem is used with the dynamic programming technique. The developed optimum design model is applied to a three-span continuous beam, two-story one-bay, and five-story three-bay frame structures to prove the validity of the model.
Probabilistic Fatigue Analysis of RC Beams Strengthened by Steel Plate or Carbon Fiber Sheet
Sim, Jong-Sung ; Bae, In-Hwan ; Jang, Sang-Hoon ;
Journal of The Korean Society of Civil Engineers, volume 18, issue 1_4, 1998, Pages 437~437
The purpose of this study is to investigate probabilistic fatigue behavior of R/C beams strengthened with carbon fiber sheet(CFS) or steel plate using Weibull distribution. Twelve specimens(
) are fabricated and one point loading system is applied. The repeated loads are applied with 2Hz and the minimum stress level is 10 percent of the maximum stress. Experimental results show that the specimens strengthened with the CFS are failed by debonding of the CFS, which results from crack propagation along the CFS adhesive interface at the higher stress level. However all the specimens strengthened with the steel plates are failed when fatigue cracks at the center of the steel plates are occurred and propagated as the number of loading increases. Analytical results by Weibull distribution are compared with the test data. The unknown Weibull distribution parameters are estimated from observations recorded during the fatigue test. Safety factors for the number of loading and the stress levels are obtained 1.08 and 3.34 for the CFS and 1.16 and 6.04 for the steel plate, respectively. The S-N-P curves are also generated from the tests and probabilistic analysis. It is shown that the Weibull distribution is physically more convincing features and may be appropriate to describe the fatigue behavior of strengthened R/C beams.
An Experimental Study on the Transport of Chloride Ions and the Corrosion of Reinforcing Steel in Coastal Concrete Structures
Kim, Eun-Kyum ; Shin, Chee-Burm ; Cho, Won-Il ; Lee, Yun-Han ;
Journal of The Korean Society of Civil Engineers, volume 18, issue 1_4, 1998, Pages 447~447
The deterioration of coastal concrete structures is mainly caused by the corrosion of reinforcing steel induced by the attack of chloride ions. An experimental study was performed to investigate the distribution of concentration of chloride ions in a coastal concrete structure which is 30 years old and to measure the half-cell potential of embedded steel by using the copper-copper sulfate reference electrode. Quantitative analysis showed that the concentration of chloride ion in the aqueous phase near the surface of embedded steel exceeded a threshold value for corrosion, 0.05% by weight in concrete. The value of half-cell potential at some members of embedded steel was measured to be lower than-350mV, indicating that the probability of corrosion is more than 90%. The prediction of corrosion based on the experimental measurements was confirmed by the observation of corrosion on the surface of steel bars in the concrete core taken out of the concrete structure.
Effectiveness of TMDs for Control of Traffic Induced Bridge Vibrations
Kwon, Soon-Duck ;
Journal of The Korean Society of Civil Engineers, volume 18, issue 1_4, 1998, Pages 457~457
The purpose of this study is to investigate the effectiveness of multiple tuned mass damper(TMD) for suppressing excessive traffic induced vibration of bridge. The new equation of interactive motions between bridge, vehicle and multiple TMD were derived. The effects on dynamic response of bridge and control efficiency of vibration due to variation of properties of vehicle and TMD were studied. Based on the numerical simulation, it has been found that damping and frequency of vehicle greatly affects the bridge response by interaction. When the vehicle runs on the bridge, TMD cannot maintain its optimal control condition because the natural frequency of bridges are changed by interaction. It would be concluded that TMD is not effective to suppress the forced vibration due to the traffic loads except for free vibration after passing.
Experimental Study on Fracture Characteristics and Size Effect for High Strength Concrete Beam
Eo, Seok-Hong ; Kim, Hee-Sung ; Kwak, Kyu-Seok ;
Journal of The Korean Society of Civil Engineers, volume 18, issue 1_4, 1998, Pages 469~469
In order to obtain more information on the fracture characteristics and the size effect for High Strength Concrete (HSC), a series of three-point bend tests were carried out for total 48 plain concrete specimens. Four beam sizes of 50.8 mm, 101.6 mm, 203.2 mm and 406.4 mm with three initial crack to beam depth ratios of 0.0, 0.2 and 0.4 were considered. Two levels of compressive strengths of 27.7 MPa for Normal Strength Concrete (NSC) and 81.3 MPa for HSC were considered for each test series. The load-CMOD (Crack Mouth Opening Displacement), load-LLD (Load Line Deflection) diagrams and the flexural strains at five points along the center line of the beam specimens were measured. The experimental results were discussed in terms of the effect of beam depth, initial crack to beam depth ratio and the compressive strength on the fracture characteristics and the size effect relationships. A finite element analysis, using bilinear Fictitious Crack Model (FCM), was made for comparison with the experimental results.
Failure Behavior and Tension Stiffening of RC Tension Members
Lee, Bong-Hak ; Hong, Chang-Woo ; Chang, Dong-Il ;
Journal of The Korean Society of Civil Engineers, volume 18, issue 1_4, 1998, Pages 483~483
The tension stiffening effect is defined as the increase in stiffness in reinforced concrete member due to the stiffness provided by concrete between cracks.. If this is disregarded in analysis of reinforced concrete members, especially at the level of service loads, member stiffness may be underestimated considerably. This paper presents on the failure behavior and tension stiffening of RC tension members, based on the experimental results which were obtained from direct tension test with main experimental variables such as concrete strength, diameter and strength of reinforcement steel. The tension stiffening was analyzed from the load-displacement relationship by ACI code and the equation proposed by Collins & Mitchell. In summary, the effect of tension stiffening rapidly decreased as the rebar diameter increased, rebar strength increased and concrete strength increased. The effect of tension stiffening on RC member was biggest near the behavior of concrete cracking and decreased as the load closed to the breaking point. Thus, the tension stiffening should be considered for the precise analysis near the cracking load of concrete.
Stochastic Finite Element Method of Nonlinear Plane Frame Structures under the Earthquake Excitations
Han, Sang-Mook ;
Journal of The Korean Society of Civil Engineers, volume 18, issue 1_4, 1998, Pages 495~495
A method of stochastic finite element analysis is developed in this study to solve for the response statistics of nonlinear frame structures under the earthquake excitations. Emphasis is on structural nonlinear behavior due to both large deflection and inelastic deformation. The constitutive law is based on an explicit differential equation model, and the model parameters are determined in terms of material property constants according to plasticity theory. Earthquake excitations are modeled as Gaussian filtered white noises. Based on a total Lagrangian finite element formulation, a set of stochastic nonlinear equations of motion is obtained. A stochastic equivalent linearization method, in conjunction with a decomposition method, is then developed to solve of the total response statistics. The proposed method is compared with the Monte-Carlo simulation method for the accuracy of the results.
A Study on the Static and Fatigue Behavior of High Tension Bolted Joints (I) - Influence of Surface Treatment Condition of Faying Surface -
Lee, Seung-Yong ; Chang, Dong-Il ;
Journal of The Korean Society of Civil Engineers, volume 18, issue 1_4, 1998, Pages 507~507
In the high tension bolted joints, it is a general rule that the faying surfaces between base metal and splice plate shall not be painted to obtain surface roughness. However, during the fabrication and construction period, the corrosion and the defection of painting easily occur in the field. This study performs in order to evaluation the mechanical behavior of the joints due to surface treatment conditions on faying surface. Experimental studies are divided into static and fatigue tests. The former is performed to measure the slip force and slip coefficient, the latter is performed to evaluate the fatigue strength. Also, relaxation tests are performed to measure directly the reduction of clamping force after clamping the high tension bolts. In the case of zincrich primer on the faying surface, the variation due to elapsed time of clamping force increases but not excesses 10 percents. In addition, zincrich primer on the faying surface has no effect on the slip coefficient and the fatigue strength. When the enough thickness of paint film provided, painting on the faying surface has no effect on the mechanical behavior of high tension bolted joints.
Behavior of RC Bridge Decks on Steel Girders Subjected to Pulsating Axle-Loads
Youn, Seok-Goo ; Chang, Sung-Pil ; Bae, Doo-Byong ;
Journal of The Korean Society of Civil Engineers, volume 18, issue 1_4, 1998, Pages 517~517
This paper presents the fatigue test results of three one-third-scale bridge deck models of an 18 cm. thick and 14.7 m. long prototype concrete bridge deck supported on three simply supported steel gilders spaced at 2.1 m. The bridge deck is subjected to pulsating axle-loads which is 3.75 times greater than the axle-load of DB24. The effects of the amount of reinforcement and the absence of top reinforcement on the fatigue behavior of the bridge decks are mainly discussed. Test results show that heavily reinforced deck slabs have higher fatigue strength. However, fatigue strength is not influenced by the absence of top reinforcements. Transverse cracks occurred at the top surface of the bridge decks, usually penetrate full depth of test specimens, and eventually accelerate the loss of load-carrying capacity of RC bridge decks. It is also observed that the fatigue strength of RC bridge decks is related with the amount of transverse bottom reinforcement.
Strategic Improvements on Quality Management for the Engineering / Design of Plant Construction Cases in Korea
Lee, Tai-Sik ; Kang, Jae-Jun ;
Journal of The Korean Society of Civil Engineers, volume 18, issue 1_4, 1998, Pages 529~529
The major objective of this study is to provide directions for improvement in the field of engineering/design quality management. This is essential for the Korean plant engineering industry to survive in the international market which beccomes increasingly competitive and protective. The Korean construction market has become opened by the Uruguay Round, and the non-tax protection has been abolished per establishment of ISO 9000 quality system. In order to obtain the objective the present quality management systems of the Korean engineering companies are reviewed through case studies of several plant engineering projects. This is done to improve the engineering/design quality in the plant construction industry in Korea. Some basic quality assurance systems and quality evaluation methods are suggested.
A Study on Improved Strategies for Top Quality Management at the Procurement and Construction Processes of Plants through Case Studies in Korea
Lee, Tai-Sik ; Kang, Jae-Jun ;
Journal of The Korean Society of Civil Engineers, volume 18, issue 1_4, 1998, Pages 539~539
Korean engineering/construction companies have to improve qualify management systems to remain competitive in domestic and international construction markets. In order to provide an improved qualify management system, this study presents quality management strategies for Korean engineering/construction companies. Problems of current quality management systems are first identified through the non-conformity cases of plant construction sites in Korea. Comparisons between the quality management practice of Korean plant engineering/construction companies and the ISO 9001 requirements are performed next. Then quality management requirements at the procurement and construction processes are suggested.
Development of a Cost Estimating System by the Relational Database System
Kang, Leen-Seok ;
Journal of The Korean Society of Civil Engineers, volume 18, issue 1_4, 1998, Pages 549~549
The present study attempts to develop a problem solving computer system which can perform a tedious and complicated task of estimating construction costs. For the study, a relational database system was adopted to frame main program with a Work Breakdown Structure(WBS) as a knowledge base. The knowledge base consists of a relational database which is compatible with C language of source program. The cost estimating system, named CESNA, is easy to carry out the tasks of cost estimating by using menu pattern. CESNA provides users with information to estimate construction cost so that they can reduce the input work, and it uses the WBS as an information center for cost data such as resource mobilizations and unit work prices. CESNA could be a tool to manage cost estimating processes with a standardized method for similar projects.
An approach for the Improvement of Construction Regulation and Code Management System
Chin, Kyung-Ho ; Kim, Tae-Song ; Koo, Jai-Dong ; Cho, Moon-Young ;
Journal of The Korean Society of Civil Engineers, volume 18, issue 1_4, 1998, Pages 561~561
To cope with the opening of Korea construction market and the potential increasing of construction claims and disputes, the needs of an advanced construction regulation and code system are increasing. To meet these needs and to provide more effective construction regulations and codes, this research analyzes the existing construction regulations and codes, and surveys the engineer's experience with a questionnaire. This research proposes a new format for the practical utilization of the construction regulations and codes. This construction regulation and code system proposed will provide a convenient environment for the maintenance and continuous improvement of the system. In addition, this system offers an opportunity to acquire the basic technology and knowledge which are necessary to establish an advanced construction regulation and code system. In economic aspect, the strict application of the improved construction regulations and codes will reduce the probability of the construction claims and disputes. As a result, this research will bring the improvement not only in the standards for design and construction, but also in the Korea construction industry.
An Evaluating Method of Prestress Forces on a Dome of a Prestressed Concrete Containment
Kim, Myoung-Mo ;
Journal of The Korean Society of Civil Engineers, volume 18, issue 1_4, 1998, Pages 573~573
Stress analysis of prestressed concrete nuclear reactor containment requires information about the force distributions resulting from the prestressing of the concrete. In the containment wall portion, the hoop tendon arrangement produces relatively uniform pressure type forces. So the forces due to hoop tendon are well idealized as uniform external pressure type load or line loads acting at the tendon position. In the dome portion, however, the axisymmetric idealization of containment dome can not simplify the non-axisymmetric tendon profiles. In this study, an evaluating method of prestress forces on hemispherical dome is presented, using simple integral equations which represent tendon forces considering tendon arrangements and frictional loss due to length and curvature effects. A computer program was developed to determine the prestress forces on the dome concrete. Using the program, parametric analysis has been carried out to verify the proposed methodology.