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
Stress Analysis of Plate Structures using an Improved Finite Element
Kim, Sun-Hoon ;
Journal of The Korean Society of Civil Engineers, volume 16, issue 1_5, 1996, Pages 505~505
An improved finite element for the analysis of plate structures is suggested in this paper. This element is based upon Mindlin plate concept. The displacement field of this element is also formulated by adding two non-conforming modes to rotational displacement components of a heterosis plate element. It is shown that the results obtained by the proposed element converged to analytical solutions very rapidly through numerical studies for various benchmark problems, and overcome the shear locking problem completely in very thin plate situation even for distorted meshes. It is also noted that the element is applicable to the dynamic analysis of plate structures.
Experimental Study on the Concrete Properties Subjected to Vibration of Nearby Pile Driving
Yoon, Young-Soo ; Jang, Il-Young ; Lee, Seung-Hoon ;
Journal of The Korean Society of Civil Engineers, volume 16, issue 1_5, 1996, Pages 515~515
This paper presents the full-scale test at site under the actual construction condition which enables an assessment of the effect of vibration due to nearby single to group pile driving on the concrete properties such as the compressive strength, modulus of rupture, splitting strength and bond strength. This paper also quantifies the influence distance of 30 m to 45 m according to the pile category from the pile driving site to the safety zone where the fresh concrete can be placed without any degradation of concrete characteristics due to the possible disturbation in the process of hardening.
Wave Propagation Analysis on the Buried Explosives
Lee, Sang-Ho ; Park, Jong-Kwan ; Lee, Soo-Kyoung ;
Journal of The Korean Society of Civil Engineers, volume 16, issue 1_5, 1996, Pages 527~527
Explosion phenomena from the buried explosives are numerically simulated by using finite difference algorithm. The detonation process is implemented by the programmed bum method in which the explosive chemical energy stored in the finite difference mesh is released according to the Chapman-Jouguet detonation speed. The constitutive law for the medium through which explosive wave propagate is the Von-Mises. Governing equations of this study are conservation equations of momentum, mass, and energy in Lagrangian coordinate system which is fixed to the material. Due to the shock front which violates the continuity assumptions inherent in the differential equations numerical artificial viscosity is used to spread the shock front over several computational zones. These governing equations are solved by finite difference method with discretized time and space coordinates. The associated normality flow rule as a plastic theory is implemented to find the plastic strains.
A Study on the Analysis and Corner Joint Design of Underground R.C Box Structure
Oh, Byung-Hwan ; Chae, Seong-Tae ; Lee, Myung-Kyu ; Shin, Ho-Sang ;
Journal of The Korean Society of Civil Engineers, volume 16, issue 1_5, 1996, Pages 539~539
A basic assumption in the current design and analysis of reinforced concrete(RC) box structures, which are constructed by the open cut and fill method, is that the displacements and forces are uniform in the longitudinal direction of the structure. The solution may be therefore obtained from the analysis of a unit wide strip along longitudinal axis. This strip is said to be in a plane strain condition, meaning that the out of plane deformations are vanished. The current design of box structure is carried out by the result of planar frame model fer the sake of simplicity The purpose of this study is to show more rational design method of box culverts considering a rigid zone of comer joints. The current analysis of box structures will be compared with the plane strain analysis as well as 3-d shell model. In addition, the amount of longitudinal distribution reinforcements will be estimated as a ratio of transverse main rebar in the design purpose of box structures. Reinforcement quantity is also determined to resist the tensile force in comer joints of box structures using strut-tie model which has been developed through the elastic analysis.
Multiobjective Optimization for Parallel Processing
Kim, Ju-Tae ; Kim, Dong-Ok ; Lee, Jong-Won ; Lee, In-Won ;
Journal of The Korean Society of Civil Engineers, volume 16, issue 1_5, 1996, Pages 551~551
A new multiobjective optimization technique is proposed. When two or more objective functions exist, the most important objective function is adopted as the primary criterion and the other objective functions are transformed into the constraits by imposing upper or lower limits on them. The multiobjective optimiation then can be treated as the single-objective optimization. The initial vectors are generated in the feasible region independently, if the feasible design region defined by the constraints is convex. This technique makes it possible to adopt the parallel processing in the multiobjective optimization. The proposed multiobjective optimization technique combined with the parallel processing is very efficient because there is no increase of the total solution time regardless of the increased number of Pareto optimal solutions. As examples for demonstration of the proposed approach and its applicability, the design of a I-beam and a steel box girder bridge is presented.
An Inverse Analysis for Identifying Soil Properties in Excavation Analysis by Elasto-plastic Soil Spring Model
Lee, Hae-Sung ; Chung, Choong-Ki ; Kim, Jae-Kwan ; Kim, Bong-Kyun ;
Journal of The Korean Society of Civil Engineers, volume 16, issue 1_5, 1996, Pages 561~561
This paper presents an inverse analysis for identification of soil properties in excavation analysis by elasto-plastic soil spring model. The proposed method is based on the least square method to find soil properties which minimizes errors between calculated displacement and observed displacement. The integration of square of the errors over an analysis domain is used as an objective function. Since the number of observation points is usually much less than the number of degrees of freedom of structures, eigenvectors of earth-retaining structures are used to interpolate observed displacements over analysis domain. To validate the proposed method, two examples with numerically simulated displacement we presented.
Torsional Analysis of Steel Fiber Reinforced Concrete Beams
Lee, Seung-Han ;
Journal of The Korean Society of Civil Engineers, volume 16, issue 1_5, 1996, Pages 573~573
While concrete is brittle, fiber reinforced concrete has the advantage of a great toughness. Therefore, numerous studies have been made for many years related to the behaviour and strength of fiber reinforced concrete. However, torsional analyses of the structural member have not been reached to satisfactory results, since the analysis model and tension stiffness curve of steel fibers in the mixed concrete is obscure. In this study, therefore, the tension stiffness curve depending on the volume of steel fiber is simplified, so that the modified space truss model, which is possible to estimate the torsional behaviour under the serviceability state as well as ultimate state, including the tension stiffness curve, is produced. The aim of this study is also to present the torsional behaviour of fiber reinforced concrete member subjected to torsion over the entire loading history. using basic equations which are derived from compatibility and equilibrium based on this model. The results of this analysis show that the load-twist relationship and the strain of concrete and steel can be accurately estimated when the steel fiber reinforced concrete member is subjected to pure torsion.
Nonlinear Analysis of Reinforced Concrete Plate Element Subjected to Monotonic Load
Choi, Jeong-Ho ; Yoo, Young-Hwa ; Shin, Hyun-Mock ;
Journal of The Korean Society of Civil Engineers, volume 16, issue 1_5, 1996, Pages 585~585
Mechanical behaviors of reinforced concrete plate elements under the monotonic in creased loading are very hard to predict exact, mainly because of the difficulty in modeling the cracked concrete. Once a model can predict its behaviors successfully, it can be readily combinded into the finite element analysis program to estimate the nonlinear and inelastic behaviors of reinforced concrete structures up to the fracture. In this study, an analytical model is presented which can predict more precise the stress-strain relationships and the ultimate load of reinforced concrete plate elements under the various in-plane forces. This model can predict various nonlinear behaviors after cracking or yielding of steel. Verification of the analytical model is carried out by comparing with several experimental results using a program embeded in this proposed model.
An Experimental Study on Axial Force-Moment Capacity of High-Strength Concrete Tied Column Sections
Park, Hae-Geun ; Lee, Jae-Hoon ;
Journal of The Korean Society of Civil Engineers, volume 16, issue 1_5, 1996, Pages 595~595
Reinforced concrete column is an effective structural element to take advantage of high strength concrete. Column test under eccentric loading was performed to investigate the strength of normal and high strength concrete columns. The test variables were concrete strength. steel ratio, slenderness ratio, and eccentricity. The experimentally obtained data of column section strength were compared with the analytical results by use of the equivalent rectangular stress block, trapezoid stress block, and Zia's modified rectangular stress block. And also, the failure mode and concrete ultimate compressive strain were observed and discussed in this paper.
Static and Fatigue Behavior of High Tension Bolted Joints with Reduced Axial Force and Surface Roughness
Choi, Il-Yoon ; Lee, Seung-Yong ; Kyung, Kab-Soo ; Chang, Dong-Il ;
Journal of The Korean Society of Civil Engineers, volume 16, issue 1_5, 1996, Pages 607~607
Since the friction type of high tension bolt is clamped by the axial force which approaches to the yielding stress, it need to be strictly managed in the axial force. But if the friction type is capable of using together with bearing state, it is easy to fabricate, construct members and to manage the axial force by reason of the allowance of the somewhat slip and the reduction of the introduced axial force. In this study, the static and fatigue tests are performed to investigate the variation tendency of the fatigue strength under the condition of the reduction of the introduced axial force, surface roughness. From the test results, the relaxation increases with decreasing the in troduced axial force and that difference increases with increasing the elapsed time. The effect of surface roughness is larger than that of the introduced axial force in the fatigue strength. Although the introduced axial force and surface roughness is reduced, the nonslip zone exist under the low applied load.
Bridge Tests for the Measurement of Truck Loads
Kim, Sang-Jin ; Park, Moon-Ho ;
Journal of The Korean Society of Civil Engineers, volume 16, issue 1_5, 1996, Pages 621~621
Knowledge of the expected extreme loads is an important element of bridge design and evaluation. Such extreme loads can be derived from the load data obtained by various equipments and procedures. This paper presents selection criteria of optimal equipment for truck load measurements and one data collection procedure, the bridge weigh-in-motion (BWIM) testing procedure. Site-specific live load spectra obtained from the BWIM tests presented. Through analysis of collected data finally some general conclusions are presented with regard to actual truck loads. The BWIM tests were performed for two or three consecutive days for each selected bridge site in Detroit, Michigan; some carry surface street traffic while others carry highway loads. Minor problems during the BWIM testing occurred, specifically in both tape switches and infrared sensors. The measured truck parameters include gross vehicle weights (GVW), axle weights, and axle spacings. The accuracy of gross vehicle weights is estimated at 95 percent and that of axle weights at 80 percent for most types of trucks, as measured with the BWIM tests. A considerable variation in traffic volume and weights of trucks occurs within a given geographic area. Furthermore, the maximum lane moments and shears due to the trucks vary between 0.6 and 2.0 times AASHTO LRFD values. The observed truck weights are often heavier than the legal limit, especially the axle weight limit. The relationship between GVW and lane moment distributions is linear for spans greater than 18m, or for vehicles with GVW less than 530W. In conclusion, measured truck data for each bridge site can effectively provide site-specific live load spectra for accurate bridge evaluation. Further measurements of truck loads from more bridges would provide necessary information for both calibration of new bridge design codes and classification of bridges.
Formulation of 3-D Transmitting Boundary Hyperelement in 3-D Cartesian Coordinate System
Kim, Jae-Kwan ; Kwon, Ki-Jun ;
Journal of The Korean Society of Civil Engineers, volume 16, issue 1_5, 1996, Pages 633~633
A 3-dimensional transmitting boundary hyperelement is formultated in 3-dimensional Cartesian coordinate system which is applicable !o the dynamic soil-structure interaction problems of arbitrary shape foundations in a layered stratum overlain rigid bedrock. Dynamics of square and rectangular rigid surface foundation on a homogeneous stratum is analyzed by a hybrid method in which the finite region including foundation in modeled by conventional finite element method and the effects of surrounding infinite region is taken care of by the newly developed transmitting boundary. The calculated dynamic stiffness matrices are compared with the published results and a good agreement is observed between them.