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 16, Issue 3_6 - Nov 1996
Volume 16, Issue 2_6 - Nov 1996
Volume 16, Issue 1_6 - Nov 1996
Volume 16, Issue 3_5 - Sep 1996
Volume 16, Issue 2_5 - Sep 1996
Volume 16, Issue 1_5 - Sep 1996
Volume 16, Issue 3_4 - Jul 1996
Volume 16, Issue 2_4 - Jul 1996
Volume 16, Issue 1_4 - Jul 1996
Volume 16, Issue 3_3 - May 1996
Volume 16, Issue 2_3 - May 1996
Volume 16, Issue 1_3 - May 1996
Volume 16, Issue 3_2 - Mar 1996
Volume 16, Issue 2_2 - Mar 1996
Volume 16, Issue 1_2 - Mar 1996
Volume 16, Issue 3_1 - Jan 1996
Volume 16, Issue 2_1 - Jan 1996
Volume 16, Issue 1_1 - Jan 1996
Selecting the target year
An Experimental Study on the Steel Fiber Reinforced Shotcrete
Paik, Shin-Won ; Kim, Dong-Baik ;
Journal of The Korean Society of Civil Engineers, volume 16, issue 1_3, 1996, Pages 217~217
Recently, tunnels are increasingly constructed in this country with the increased construction of highways, high-speed railways and subways. Shotcreting is one of the major processes in the tunnel construction. Many problems, however, exist in the current shotcreting practice. The purpose of the present study is, therefore, to explore the troubles in the current shotcreting practice, and to develop steel-fiber reinforced shotcrete for high tough-ness and ductility. The steel-fiber reinforced shotcrete. which can replace the wire-mesh reinforcement in the conventional shotcrete and thus can save considerable labor activity, was developed through extensive experiments. The proposed steel-fiber shotcrete was verified through fold tests in actual tunnel construction sites. The main advantages of steel-fiber shotcretes were also explored. The present study provides a firm base in our country to apply high-quality shotcretes such as steel-fiber shotcretes.
A Study on the Characterization of Cement Paste and Mortar Containing either Natural Zeolite or Fly Ash
Choi, Jae-Jin ; Lee, Kyung-Hwan ; Lee, Chang-Yong ;
Journal of The Korean Society of Civil Engineers, volume 16, issue 1_3, 1996, Pages 227~227
Properties of cement paste and mortar containing either natural zeolite or fly ash were discussed in this study. The amount of
formed in the cement paste containing natural zeolite was less than that in the cement paste containing fly ash. Compressive strength of mortar containing natural zeolite increased rapidly at early age, while the strength of the mortar with fly ash increased gradually. These results indicate that dealumination from zeolite structure in process of cement hydration had influence on early-development of pozzolanic reaction of mortar containing natural zeolite, which was different from that of mortar containing fly ash.
The Functions for the Influence Lines of Continuous Beams
Oh, Ji-Taek ; Cho, Neung-Ho ; Yang, Chang-Hyun ;
Journal of The Korean Society of Civil Engineers, volume 16, issue 1_3, 1996, Pages 237~237
For the evaluation of influence lines of continuous beams, existing methods are usually inconvenient because of cumbersome processes of calculation. This paper presents functions of influence lines for the continuous beams up to five spans. The functions are developed from the analytical results for continuous beams, and can be applied to any arbitrary span ratios. For derivation of the functions, the Mathematica program is used which has a capability of symbolic manipulation. The developed functions result in relatively simple forms when the numerical values of the span ratio are given, and can provide easily all the data of influence lines by means of differentiation or integration process. Furthermore, the functions provide the background of mathematical calculations for the areas of the influence line diagram, or the maximum values of member forces. The functions seem to be more suitable and convenient for the computer programming than any other existing methods.
Shear Transfer across Uncracked Interface of Steel Fiber Reinforced Concrete
Moon, Je-Kil ; Hong, Ik-Pyo ; Lee, Seong-Jin ;
Journal of The Korean Society of Civil Engineers, volume 16, issue 1_3, 1996, Pages 249~249
The shear transfer must be considered for designing interfaces between precast beam and cast-in-place deck slab, bracket in column etc. The shear transfer is carried out by the combination of uncracked concrete, aggregate interlock, dowel action and axial restraint stiffness of reinforcement crossing a crack plane. This paper reviews a method of predicting the ultimate capacity of push-off specimens subjected to shear force. The for mula is taking into consideration for the contribution of steel fiber, the horizontal steel reinforcement, the angle of shear plane and the strength of concrete. The load-carrying capacity of steel fiber reinforced concrete with inclined shear plane is calculated by using the plastic theory. 42 push-off specimens were tested, some with, some without rein-forcement and steel fiber against shear plane. Based on these investigation, a method for predicting the shear capacities of fiber reinforced concrete is proposed. The comparisons between the predicted values and the tested values are presented to verify the proposed equations for shear capacity of steel fiber reinforced concrete.
Finite Element Analysis of Thin-walled Horizontally Curved Multi-girder Bridges
Kang, Young-Jong ; Jung, Ju-Ho ; Yoon, Ki-Yong ;
Journal of The Korean Society of Civil Engineers, volume 16, issue 1_3, 1996, Pages 261~261
In the present study, a numerical formulation procedure for structural analysis of thin-walled horizontally curved multi-girder bridges is presented. The presented finite element procedure consists of curved and straight beam elements including warping degree of freedom. The curved beam element is based on the new theory of thin-walled curved beams by Kng and Yoo presented in 1994. The homogeneous solutions of curved beam equations were used for shape functions in the numerical formulation to achieve good convergence. In the straight beam element, the third order hermite polynomials were used for shape functions. Employing the method of static condensation, the presented procedure is designed to treat various types of connections. Also included in the present study is the incorporation of skew boundary conditions which are inevitable in most curved multi-girder bridges. Numerical examples were given for bare steel models of a curved bridge consisting of thin-walled curved beams and radial cross beams, and were compared with existing results.
Vibration Control of Bridges under Moving Loads
Kwon, Ho-Chul ; Kim, Man-Cheol ; Lee, Jong-Heon ; Lee, In-Won ;
Journal of The Korean Society of Civil Engineers, volume 16, issue 1_3, 1996, Pages 271~271
This paper presents vibration control of bridges under moving loads using tuned mass damper (TMD). TMD, a kind of passive type control device, has a variety of merits in that it has permanent service time, and needs easy management and maintenance efforts and no external power supplying sources. TMD is tuned to the 1st dominant vertical mode and installed in the middle of bridges. The dynamic response of bridges subjected to moving loads can be obtained using moving mass model that considers the effects of the vehicle mass, thus TGV highspeed trains are modeled as 2 DOF system consisting of wheel and body. To show the efficiency of TMD in the case of 3-span bridge the midpoint vertical displacements and their fast Fourier transform results are com-pared before and after the installation of TMD.
Hierarchical Approach for Analysis and Synthesis of Large Scale Structural Systems
Hwang, Jin-Ha ; Lee, Hak-Sool ; Park, Jong-Hoi ;
Journal of The Korean Society of Civil Engineers, volume 16, issue 1_3, 1996, Pages 283~283
Hierarchical approach for analysis and synthesis of large scale structural systems is presented. The conceptual framework of this method is modelling of structure as hierarchical system horizontally/vertically assembled with substructures and combining of hierarchical substructuring analysis procedure with decomposition/coordination of multilevel optimization. Based on such framework, modulized analysis and synthesis processes are linked on the common substructuring system, where each module is integrated mathematically and structurally. Design sensitivity vector is calculated by statespace method on the substructuring basis same as behavior analysis. And sub-structures are coordinated with active constraints information for system level and weight ratio criteria. Numerical examples are presented to demonstrate the validity and the efficiency of the present method.
Flexural-Torsional Buckling of Thin-Walled Monosymmetric Arches
Kang, Young-Jong ; Yu, Chul-Soo ; Lim, Nam-Hyoung ;
Journal of The Korean Society of Civil Engineers, volume 16, issue 1_3, 1996, Pages 293~293
A flexural-torsional buckling theory for circular arches of monosymmetric cross section is developed using the principle of minimum total potential energy An explicit and clear approximation of the curvature effect is made in the derivation process. Closed form solutions are obtained for arches subjected to equal and opposite end moments(uniform bending) and to uniformly distributed radial loads (uniform compression). The method of assumed mode is used in determining the buckling loads. An extensive comparative study with other studies provides the validity of the presented theory.
A Study on the Optimum Design of Two Span Continuous P.S. Composite Bridges Considering the Construction Steps
Koo, Min-Se ; Shin, Hyun-Seop ;
Journal of The Korean Society of Civil Engineers, volume 16, issue 1_3, 1996, Pages 305~305
After investigating the existing construction method for 2-Span Continuous Prestressed Composite Bridges(existing 2-Span PCB's), it is partially modified the step of applying and removing the preflexion loading, and the estimation of the final stress on the creep & shrinkage effects. For the optimum design of 2-Span PCB's, the cost of the material is formulated as the objective function and constraint equations are constructed according to the limited dimensions of design section and the allowable stress of each member presented in the procedure of the modified design method and specifications. As the optimization technique Sequential Unconstrained Minimization Techniques (SUMT), one of the numerical analyses, is applied to those formulated equations. In the basis of sensitivity analysis the optimized design sections are determined for several span lengths (30m, 35m, 40m, 45m, 50m) and compared with those of Simple Preflex Composite Beams(SPCB) and the existing 2-Span PCB's. The comparison with SPCB shows that optimum design in this study can reduce
of the steel plate girder section area and
of the concrete section area, with the existing 2-Span PCB's
Modeling Method of Prestress Tendon for Finite Element Analysis of Containment Dome and Base Slab
Chung, Chul-Han ; Jang, Sung-Wook ; Cho, Kyung-Tae ; Jeong, Han-Jung ;
Journal of The Korean Society of Civil Engineers, volume 16, issue 1_3, 1996, Pages 317~317
An axisymmetric model is usually adopted for the analysis of a reactor containment subject to internal pressure. In the finite element analysis with the model, consequently the steel reinforcements and prestress tendons are modeled by using the axisymmetric truss or ring elements with the constant cross-sectional area. For the case of the perimeter wall of a cylindrical containment, the effective reinforcement ratio can be easily specified by the constant cross-sectional area of the truss element. However, the constant cross-sectional area of the truss element cannot reflect the effect of reinforcement variation along the meridional direction at the dome of the structure. Due to the limitation of the model, the premature yielding of the reinforcement or tendon and irregular deformation at the dome have been reported. In this paper, the modeling method handling the reinforcement variation along the meridional direction at the dome of the structure is developed and presented. The validity of the model is verified by the comparisons of the results from the proposed model with those from existing models.
A Study on the Effective Operation of Tunnel Boring Machines
Park, Hong-Tae ;
Journal of The Korean Society of Civil Engineers, volume 16, issue 1_3, 1996, Pages 329~329
The main concern of contractors who operate TBM shows up over the geologic conditions which directly affects the construction operation. especially the digging-through-ratio. But in fact, it is only a part of micro-geology. Therefore, it is more complicated than our imagination when the operators overview the project from the point of view of macro-geology. With the assumption kept on mind that several factors exist in the tunnelling operation, it is nearly impossible to calculate the appropriate TBM's digging-through-ratio and functions without ignoring the potential error from the factors This present study analyzes the TBM's digging-through-ratio in the
where the related theories for the analysis of working hours and the efficiency of TBM have been applied by breaking down the total working hours into the specific hours for boring, miscellaneous, jobsite delays, rock support, repair of backup, repair of TBM, cutter change, and resoling etc. This resort may estimate cost and duration of construction applied TBM method in the future.
Appropriate Measures far Operation Improvement through a Survey of Scheduling
Park, Hong-Tae ;
Journal of The Korean Society of Civil Engineers, volume 16, issue 1_3, 1996, Pages 339~339
In the future, the domenstic construction businesses are expected to be out of the existing task of construction scheduling operated by imperfection and non-automatic system in order to answer satisfy the globalizatioin resulted from the UR conference. Now is the time to pay particular attention to the introduction of new techniques for construction scheduling as well as that of design and construction techniques. Therefore, this research shows the recent operating status of construction scheduling through the survey and verifies it as an appropriate measures for operation improvement. Also, the data demonstrated are considered to be a effective way in the construction scheduling operated in the field.
Relationship between Energy Consumption and Vertical Alignments for Rail Transit Routes
Kim, Dong-Nyeong ;
Journal of The Korean Society of Civil Engineers, volume 16, issue 1_3, 1996, Pages 355~355
Dipped track profiles between rail transit stations can significantly reduce propulsive energy, braking energy and travel times. This work quantifies their potential benefits for circumstances reflected in various values for dips, speed and acceleration limits, stations spacings, and available power. A deterministic simulation model has been developed to precisely estimate train motion and performance using basic equations for kinematics, resistance, power and braking. For a dip of 1% of station spacing, in which gradients never exceed 4%, our results show savings (compared with level tracks) exceeding 10% for propulsive energy, 16% for braking energy and 4% for travel time between stations.