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 Earthquake Engineering Society of Korea
Journal Basic Information
Journal DOI :
Earthquake Engineering Society of Korea
Editor in Chief :
Volume & Issues
Volume 13, Issue 6 - Dec 2009
Volume 13, Issue 5 - Oct 2009
Volume 13, Issue 4 - Aug 2009
Volume 13, Issue 3 - Jun 2009
Volume 13, Issue 2 - Apr 2009
Volume 13, Issue 1 - Feb 2009
Selecting the target year
Study on Shear Wave Velocity of Fill Dam rock zone using Surface Wave Method
Kwon, Hyek-Kee ; Shin, Eun-Chul ;
Journal of the Earthquake Engineering Society of Korea, volume 13, issue 5, 2009, Pages 1~9
DOI : 10.5000/EESK.2009.13.5.001
In this study, the properties of shear wave velocity of coarse gravel in filldams are analyzed. Shear wave velocity is derived using the surface wave analysis method, which can be used nondestructively on the surface of filldams. These values are acquired through the tests for the rock zone of six filldams by SASW and HWAW methods. These analytical results are compared with results obtained through the frequently-used empirical method of Sawada and Takahashi.
Performance Evaluation of Floor Vibration of Biaxial Hollow Slab Subjected to Walking Load
Kim, Min-Gyun ; Park, Hyun-Jae ; Lee, Dong-Guen ; Hwang, Hyun-Sik ; Kim, Hyun-Su ;
Journal of the Earthquake Engineering Society of Korea, volume 13, issue 5, 2009, Pages 11~21
DOI : 10.5000/EESK.2009.13.5.011
Considering that the weight of a biaxial hollow slab system is not increased with an incremental increase in its thickness, and that the flexural stiffness of a biaxial hollow slab is not significantly lower than that of a general solid slab, there has been a growing need for biaxial hollow slab systems, because long span structures are in great demand. In a long span structure, the problem of vibration of floor slabs frequently occurs, and the dynamic characteristics of a biaxial hollow slab system are quite different from the conventional floor systems. Therefore, in this study, the floor vibration of a biaxial hollow slab system subjected to walking load is investigated in comparison with a conventional floor slab system. For the efficiency of time history analysis, an equivalent plate slab model that can precisely represent the dynamic behavior of a biaxial hollow slab system is used. From the analytical results, it was determined that vibration of a biaxial hollow slab system subjected to walking load is evaluated as "office-level vibration," according to the classifications of the architectural institute of Japan and ANSI.
Source parameters for the December 13 1996 M
4.5 Earthquake in Yeongwol, South Korea
Choi, Ho-Seon ;
Journal of the Earthquake Engineering Society of Korea, volume 13, issue 5, 2009, Pages 23~29
DOI : 10.5000/EESK.2009.13.5.023
On December 13, 1996, an earthquake with local magnitude (M
) 4.5 occurred in the Yeongwol area of South Korea. The epicenter was 37.2545
N and 128.7277
E, which is located inside the Okcheon Fold Belt. The waveform inversion analysis was carried out to estimate source parameters of the event according to the filtering bandwidth of seismic data. Using 0.02
0.2 Hz filtering bandwidth, focal depth and seismic moment were estimated to be 6 km and 1.3
m, respectively. This seismic moment corresponds to the moment magnitude (M
) 4.7. The focal mechanism by the waveform inversion and P wave first motion polarity analysis is a strike slip faulting including a small thrust component, and the direction of P-axis is ENE-WSW. The moment magnitude estimated by spectral analysis was 4.8, which is similar to that estimated by waveform inversion. Average stress drop was estimated to be 14.3 MPa.
Earthquake Analysis of Dam Floodgate Using Calibrated Added Mass
Bea, Jung-Ju ; Kim, Ho-Seung ; Kim, Yong-Gon ; Lee, Jee-Ho ;
Journal of the Earthquake Engineering Society of Korea, volume 13, issue 5, 2009, Pages 31~40
DOI : 10.5000/EESK.2009.13.5.031
In this paper, a trial-error based method is presented to calibrate added mass models through numerical iterations minimizing the difference between the measured frequency data and its numerical simulation result for a dam floodgate. Earthquake analysis of the real floodgate for which the on-site hammering vibration test is performed show that the classical Westergaard added mass model gives relatively larger values in the maximum earthquake force and the maximum total displacement than the present added mass model, based on the calibration of on-site measurement data.
Residual Seismic Capacity Evaluation of RC Frames with URM Infill Wall Based on Residual Crack Width and Damage Class
Choi, Ho ;
Journal of the Earthquake Engineering Society of Korea, volume 13, issue 5, 2009, Pages 41~50
DOI : 10.5000/EESK.2009.13.5.041
Following an earthquake, the major concerns for damaged buildings are their safety/risk in the event of aftershocks, and thus a quantitative damage assessment must be performed in order to evaluate their residual seismic capacity and to identify necessary actions for the damaged buildings. Post-event damage evaluation is therefore as essential for the quick recovery of a damaged community as pre-event seismic evaluation and strengthening of vulnerable buildings. The objective of this study is to develop a post-earthquake seismic evaluation method for RC frames with URM infill wall for typical school buildings. For this purpose, full-scale, one-bay, single-story specimens having different axial loads in columns are tested under cyclic loadings. During the tests, residual crack widths, which can also be found in damaged buildings, are measured in order to estimate the residual seismic capacity from the observed damage. In this paper, the relationship between the measured residual crack width and the residual seismic capacity is discussed analytically and experimentally, and reduction factors are proposed to estimate the residual seismic capacity based on the observed damage level.
Prediction of Member Plastic Rotation Demands for Earthquake Design of Moment Frames
Eom, Tae-Sung ; Park, Hong-Gun ;
Journal of the Earthquake Engineering Society of Korea, volume 13, issue 5, 2009, Pages 51~60
DOI : 10.5000/EESK.2009.13.5.051
To secure the structural safety of structures and members against earthquakes, the plastic deformation capacity demand of members should be accurately predicted. In the present study, a method for the evaluation of the plastic deformations of members for moment frames was developed. To facilitate the practical use of the proposed method in equivalent seismic design, the plastic deformations of members were evaluated based on the results of elastic analysis, without using nonlinear analysis. The plastic deformation demands of members were formulated as functions of story drift demand, redistributed moment and member stiffness. Story drift demand and moment redistribution were directly determined from elastic analysis. The proposed method was applied to an 8 story-2 bay moment frame, and the predicted plastic deformations were verified using nonlinear analysis. The results showed that the proposed method could be used to accurately predict the member plastic rotations with simple calculations. The proposed method can be applied both to the earthquake design of new structures and to the performance evaluation of existing structures.
Experimental Study on Concrete Steel Circular Tubes Confined by Carbon Fiber Sheet under Axial Compression Loads
Park, Jai-Woo ; Hong, Young-Kyun ; Hong, Gi-Soup ; Choi, Sung-Mo ;
Journal of the Earthquake Engineering Society of Korea, volume 13, issue 5, 2009, Pages 61~71
DOI : 10.5000/EESK.2009.13.5.061
This paper presents the results of an experiment comparing the current circular CFT columns and circular CFT columns that were additionally confined by carbon fiber sheets (CFS) under axial loading. The main experimental parameters are the numbers of CFS layers and the diameter-to-thickness ratio. 10 specimens were prepared according to the experimental parameter plans, and axial compression tests were conducted. From the tests, the failure procedure, load-axial deformation curve, maximum axial strength, and deformation capacity of the CFT columns and confined CFT columns were compared. The test results showed that the maximum axial strengths of CFT columns additionally confined by CFS are increased higher than those of the current CFT columns, and that local buckling can be delayed due to the confinement effect of CFS.
Analytical Investigation for Improved Design Models of Chevron Braced Frames
Yoo, Jung-Han ;
Journal of the Earthquake Engineering Society of Korea, volume 13, issue 5, 2009, Pages 73~78
DOI : 10.5000/EESK.2009.13.5.073
Steel Braced frames are a commonly-used seismic resisting system, and chevron steel braced frames are a frequently used type of steel braced frame. Recent research has indicated that the seismic performance of braced frames can be improved by designing the braced frame gusset plate connections in a manner that direct reflects seismic deformation demands, and by permitting yielding in the gusset plate at select performance levels. A parametric study using Finite Element (FE) models was conducted to examine the influence of the gusset plate and framing elements on the seismic performance of chevron braced frames, and to calibrate and develop improved design models. The impact of the frame details, including frame sizes, clearance requirements, gusset plate thickness and tapered plate, was explored. The results suggested that proper detailing of the connection can result in a significant improvement in the frame performance. The results also show that the gusset plate thickness has a significant impact on frame performance.