• 한국지진공학회논문집
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• 제25권6호
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• pp.275-281
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• 2021

In this study, algorithms for analyzing the torsion of buildings under earthquake excitation are developed. The algorithm and formulations to account for the torsional angle are verified by analyzing the seismic acceleration time history data. The method was applied to the reference buildings to examine their operation and usability. The reference application demonstrated that the noise-canceling scheme successfully overcame various obstacles in the field measurements. The developed method is expected to be used as a tool to support a loss assessment system for determining the direction and priority of disaster response in the event of an earthquake.

• 디지털융복합연구
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• 제11권11호
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• pp.667-673
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• 2013

백제문화제는 옛 백제의 도읍지였던 공주와 부여 지역의 역사적 기반을 바탕으로 백제문화를 재조명하고 전통문화를 계승한다는 목적 하에 개최되어 왔다. 백제의 문화를 소개하고 교육하며, 한국을 대표하는 역사문화축제라는 자부심을 가지고 지역문화발전의 계기를 마련하여 지역공동체의 문화적 정체성 확립에 기여하여 왔다고 할 수 있다. 그러나 오늘날 역사문화축제인 백제문화가 당면한 문제점으로 역사문화축제가의 의미 혹은 활용방안 등에 대한 인식 부족이 있다. 이는 당초 취지와 목적에 동떨어진 방향으로 진행되고 있다는 목소리가 크다. 따라서 백제문화제의 다양한 경연프로그램 중 백제역사의 자긍심을 고취하고 백제문화에 대한 우수성과 독창성을 바탕으로 국제적 관심을 유도하여 백제문화상품에 대한 참신한 아이디어를 발굴하고 디자인 창작열을 높인 우수한 인재를 발굴하고자 백제문화상품 전국공모전을 개최하고 있으며, 본 필자는 백제문화상품 전국공모전 통한 입상작의 문화 상품으로써 문화콘텐츠 산업으로 활용할 가치가 있다고 생각한다. 따라서 백제문화상품 전국 공모전에 관한 백제문화제 일반적 고찰, 국내 문화상품 사례를 통해, 백제문화상품 전국 공모전을 활용한 백제 역사, 문화, 재인식하고 찬란한 백제의 역사적 가치를 문화상품으로써 대중들의 관람, 소비, 홍보, 체험 등으로써 대중화하는데 기여하고자 한다.

• Earthquakes and Structures
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• 제23권6호
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• pp.503-515
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• 2022

Global or partial damage to a structure due to the failure of gravity or lateral load-bearing elements is called progressive collapse. In the present study, the alternate load path (ALP) method introduced by GSA and UFC 4-023-03 guidelines is used to evaluate the progressive collapse in special steel moment-resisting frame (SMRF) buildings. It was assumed that the progressive collapse is due to the earthquake force and its effects after the removal of the elements still remain on the structures. Therefore, nonlinear dynamic time history analysis employing 7 earthquake records is used to investigate this phenomenon. Internal and external column removal scenarios are investigated and the stiffness of the connections is changed from semi-rigid to rigid. The results of the analysis performed in the OpenSees program show that the loss of the bearing capacity of an exterior column due to a seismic event and the occurrence of progressive collapse can increase the inter-story drift of the structure with semi-rigid connections by more than 50% and make the structure unable to satisfy the life safety performance level. Furthermore, connection stiffness severely affects the redistribution of forces and moments in the adjacent elements of the removed column.

• 한국노년학
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• 제25권2호
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• pp.127-141
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• 2005

치매노인을 부양하는 배우자와 성인자녀가 접하는 어려움이 다름에도 불구하고, 선행 연구들은 이들을 한 집단으로 묶어 요양시설로의 입소에 미치는 요소를 분석하였다. 미국 뉴저지(New Jersey)와 오하이오(Ohio)주에 거주하는 치매 노인 부양자 456명을 대상으로 사건사 분석(Event History Analysis)을 실시한 결과, 배우자 부양자가 성인자녀 부양자에 비해 치매노인을 더 빨리 요양시설로 보내는 경향을 보여주었다. 치매노인의 연령과 역할 구속감(Role Captivity)은 두 집단 모두에게 유의미한 변수였는데, 치매노인의 연령과 부양자의 역할 구속감(Role Captivity)이 높을수록 요양시설로의 입소가 빨라지는 경향을 보였다. 교육수준과 소득은 성인자녀 부양자에게만 유의미한 변수로, 교육수준이 높을수록 시설로의 입소가 지연되었던 반면, 소득이 높을수록 시설로의 입소는 빨라지는 경향을 보였다. 한편 탁노소(Adult Day Care) 이용과 피부양자의 문제행동(Behavioral Problems)은 배우자 부양자에게만 유의미한 변수였으며, 탁노소를 이용할 경우와 피부양자의 문제행동이 증가할수록 요양시설로의 입소가 빨라지는 경향을 보였다.

• Structural Engineering and Mechanics
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• 제74권6호
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• pp.789-807
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• 2020

Multiple earthquakes that occur during short seismic intervals affect the inelastic behavior of the structures. Sequential ground motions against the single earthquake event cause the building structure to face loss in stiffness and its strength. Although, numerous research studies had been conducted in this research area but still significant limitations exist such as: 1) use of traditional design procedure which usually considers single seismic excitation; 2) selecting a seismic excitation data based on earthquake events occurred at another place and time. Therefore, it is important to study the effects of successive ground motions on the framed structures. The objective of this study is to overcome the aforementioned limitations through testing a two storey RC building structural model scaled down to 1/10 ratio through a similitude relation. The scaled model is examined using a shaking table. Thereafter, the experimental model results are validated with simulated results using ETABS software. The test framed specimen is subjected to sequential five artificial and four real-time earthquake motions. Dynamic response history analysis has been conducted to investigate the i) observed response and crack pattern; ii) maximum displacement; iii) residual displacement; iv) Interstorey drift ratio and damage limitation. The results of the study conclude that the low-rise building model has ability to resist successive artificial ground motion from its strength. Sequential artificial ground motions cause the framed structure to displace each storey twice in correlation with vary first artificial seismic vibration. The displacement parameters showed that real-time successive ground motions have a limited impact on the low-rise reinforced concrete model. The finding shows that traditional seismic design EC8 requires to reconsider the traditional design procedure.

• 한국군사과학기술학회지
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• 제14권2호
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• pp.189-197
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• 2011

As a multidisciplinary study encompassing oceanography and history, we have attempted to reanalyze the course of a historical navel battle, Myungryang Naval Battle(September 16th, 1597 according to the lunar calendar) through hindcasting the paleo-tidal currents and -tides(PTC). Firstly, we conducted harmonic analysis using 6-month current data observed at Uldolmok and 1-year elevation data provided by Korea Ocean Research and Development Institute in order to understand their characteristics and to hindcast the PTC. Observation results show that Uldolmok, ~300m wide, relatively narrow channel, is characterized by a flood-dominant mixed mainly semidiurnal tidal regime induced by relatively-strong shallow water constituents, showing closely a standing wave type of tidal current. Further, we hindcasted PTC on the day of Myungryang Naval Battle. Our results were compared and discussed with results(time and speeds of maximum(flood and ebb) currents and high and low water times) of the previous studies estimated from different methods. Lastly, we reconstruct the course of the event of Myungryang Naval Battle recorded in the Admiral Sun-Sin Yi's War Diary(Nangjung Iigi in Korean) based on our hindcasting results.

• 한국구조물진단유지관리공학회 논문집
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• 제6권2호
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• pp.121-126
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• 2002

Due to few earthquakes in our country, one generally has thought to be safe from earthquakes. However, severe earthquakes occurred in Dangsan and Hyogohyeon which one had regarded as the zone that had not been risky for earthquakes, so that so many people died and a lot of buildings and bridges were destroyed. This event surprised our country and we undertook preparation for earthquakes on the full scale. The concept of seismic design was induced in the country which was poor in it for the scarcity of recognition and insufficiency of funds. Recently, many specialists are enforcing the provisions of seismic design. Therefore, this study introduces the method which combines PC-LEADeR( design program for L.R.B.) with LUSAS(linear elastic analysis) and performs the seismic isolation design more elaborately and simply. It verifies the propriety of that method, and it also examine the factors that affect the response of the bridges. Seismic isolation design for bridge using L.R.B. provides both economical efficiency and superior seismic performance. Second, the results between by the method proposed and by time history analysis have 20% error at the maximum. That is, the method proposed very appropriate.

• 한국전자거래학회지
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• 제18권2호
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• pp.191-203
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• 2013

정보 기술이 적용된 장비 및 운영 시스템의 발달로 실시간 운영 데이터를 수집할 수 있게 되었으며, 현재 많은 터미널이 생산성 분석을 위해 상세한 작업이력을 추적하고 있다. 터미널 운영자는 수집된 작업이력 데이터를 통해 운영 중 발생하는 문제점들을 해결할 수 있는 방안을 도출하기 원하지만, 방대한 양의 자료를 수작업으로 분석하기는 쉽지 않다. 본 연구에서는 터미널 운영 중 획득된 작업이력을 바탕으로 터미널 운영자가 원하는 컨테이너 터미널의 성능지표를 손쉽게 도출하기 위한 방안을 제시한다. 이를 위해 다양한 컨테이너 터미널의 환경과 운영 방식, 운영 장비 등을 지원하기 위해 범용적으로 사용될 수 있는 형식 프레임워크(formal framework)를 고안하였다. 본 연구에서 제안하는 프레임워크는 컨테이너 처리 객체라는 개념을 기반으로 터미널 형태, 로그 데이터, 장비의 워크플로우, 통계 처리 및 보고서를 각각 정의하는 사용자 명세 부분으로 구성된다. 그리고 제안된 프레임워크를 기반으로 터미널 성능 분석 시스템을 개발하여 그 유효성을 검증하였다.

• 한국실내디자인학회논문집
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• 제22권6호
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• pp.233-240
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• 2013

Today, museums are designed with specific purposes with themes to raise issues based on themes, history, culture or other special focuses. Among many of these thematic museums, Jewish museums are built around the world in order to let the future generations know the history and dark past memory of the Jewish people. Accordingly, the aim and significance of this study are to analyze the characteristics of design expressions of the museum architecture of Jewish museums done by various architects to help visitors empathize the dark period of the Jews during the holocaust. This particular study will be focused on analyzing 7 museums under the theme of holocaust and Jewish people's life affected because of the tragic event. Spatial organization, exhibition space composition, exhibition techniques such as the exhibition storytelling or scenario and natural light distribution will be analyzed to find expressional characters of Jewish museum's design and how the design form strengthen the museum's purpose. To achieve the aim of the study, targets for the theoretical discussion and case analysis regarding the design approach are discussed in chapter 2, characteristics of the cases are analyzed and synthesized in chapter 3, and finally the conclusion in chapter 4. The study found, that distinctive characters of spatial expression have direct impact on visitor's understanding of the museum purpose and it helps viewers to empathize and to be educated about the situation. Well designed architectural form, spatial organization, choice of materials and colors as well as story telling techniques of the museum will solidify the meaning of the exhibitions inside. Results found in the study will be the guidance for future study on thematic museum planning.

• 한국강구조학회 논문집
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• 제20권4호
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• pp.455-467
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• 2008

본 연구에서는 열차하중에 의한 아치교량의 처짐, 변형률이력곡선, 진동가속도와 같은 동적거동특성을 파악하기 위하여 동적주행시험을 실시하였다. 동적주행시험의 계측결과는 실 제원을 바탕으로 형상화 된 구조해석모델의 시간이력 및 고유치해석과의 비교를 통해 구조해석모델의 타당성을 검증하는데 이용되었다. 검증된 구조해석모델의 공진 검토결과, 주파수 일치에 의한 공진의 경우 가진 진동수와 고유진동수비가 ${1{\pm}0.04}$의 공진영향범위에서 벗어나도록 하는 것이 필요하다 판단된다. 또한 속도매개변수에 의한 공진의 경우 2차 모드 진동수는 아치교량의 동적거동에 크게 영향을 미치며 아치리브와 관련된 형고비, 라이즈비, 폭, 두께 등의 형상 매개변수 조절을 통해 실 운행속도대역 이상으로 부임계속도를 변화시킴으로서 아치교량의 동적거동을 안정화시킬 수 있었다.