초탄성 형상기억합금 능동제어 가새시스템을 이용한 중심가새프레임 구조물의 지진거동 및 복원성능 평가

허종완,박지웅,장성수,조양희 대한토목학회 2012 대한토목학회 학술대회 Vol.2012 No.10

초탄성 형상기억합금 능동제어 가새시스템을 이용한 해석모델링

허종완,손홍민,Hu, Jong-Wan,Son, Hong-Min 한국복합신소재구조학회 2013 복합신소재학회논문집 Vol.4 No.3

Design and Behavior of Recentering Beam-to-CFT Column Connections with Super-elastic Shape Memory Alloy Fasteners

허종완,황원섭 한국강구조학회 2013 International Journal of Steel Structures Vol.13 No.1

This study investigates the performance of new composite (steel-concrete) moment connections through numerical simulations. The innovative aspects of this research lay in the use of end-plate connections between steel beams and concretefilled tube (CFT) columns that utilize a combination of low-carbon steel and shape memory alloy (SMA) components. In these new connections, the intent is to use the recentering effect provided by super-elastic SMA tension bars to reduce the level of building damage and residual drift after a major earthquake. The low-carbon steel components provide excellent energy dissipation. The analysis and design of these structures is complicated because the connections cannot be modeled as being simply pins or full fixity ones; they are partial restraint (PR). A refined finite element (FE) model with sophisticated three dimensional (3D) solid elements was developed to perform numerical experiments on the PR-CFT joints with a view to obtaining the global behavior of the connection. Based on the behavioral information obtained from these FE tests, simplified connection models were formulated using 2D joint elements with nonlinear spring components. The behavior of entire connections under cyclic loads was examined. The results were compared with the connection behavior obtained from the 3D FE simulations and corresponding connection tests. Good agreement was found between the simple and sophisticated models,confirming the robustness of the approach.

Investigation on the Inelastic Behavior of Full-scale Heavy Clip-angle Connections

허종완,Roberto T. Leon,최은수 한국강구조학회 2011 International Journal of Steel Structures Vol.11 No.1

This paper describes the investigation on the inelastic behavior of steel heavy clip-angle connections subjected to static loading. The work depends on the results of a large experimental investigation into the cyclic behavior of full-scale connections involving thick clip-angle components. The results of these experimental tests are described first, and then a methodology to simulate the response of clip-angle connections numerically using nonlinear finite element (FE) models is mainly treated in this study. Extensive studies utilizing numerous 3D models are discussed, including the introduction of the pretension force into the bolts and the effects of small changes in geometry on the deformation capacity of the angles. Generally, FE test results show a good agreement with experimental test results. These outcomes indicate that it is possible to model such connections successfully if care is exercised in the modeling phase. Moreover, these FE models provide useful instrumentation which is difficult to obtain during an experiment. They have widely been used to understand the parametric effect of connection components and establish a comprehensive study of their inelastic behavior including slip deformation and prying action.

Mechanical prying and slip model for bolted clip-angle components

허종완,Seung-Su Chun,노명현 대한기계학회 2013 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.27 No.2

One of the most significant behavioral characteristics for bolted connections results in prying action and slip in that ultimate strength capacity as well as energy dissipation can be determined based on these mechanisms. The experimental programs considered herein were performed to isolate the heavy clip-angle component of bolted moment connections so that an economic parametric investigation on prying action and slip mechanism should be conducted. So, in this paper, the proposed prying and slip model are evaluated by comparing their predictions to the results of experimental component tests with respects to failure modes, ultimate clip-angle capacity, and slip resistance. Thus, the adequacy of both proposed models generally used for connection design is validated through the comparison.

Discussion of “Seismic Response of Flag-Shaped Hysteretic SDOF Systems with Seismic Fuses”

허종완 한국강구조학회 2013 International Journal of Steel Structures Vol.13 No.2

Single input-single output identification thermal response model of bridge using nonlinear ARX with wavelet networks

허종완,KALOOPMOSBEHRASHEDMOSBEH 대한기계학회 2015 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.29 No.7

Model identification of a system can be used for a variety of purposes, including model updates, damage assessment, active controland original design evaluation. We used single input-single output (SISO) nonlinear regression with least square solution and nonlinearAutoRegresive with eXogenous inputs (NLARX) with wavelet neural networks models to identify the thermal response of a bridge underhard environmental effects and estimated the nonlinearity model parameters. Fu-Sui Bridge strain structural health monitoring measurementswere used as a case study. Nonlinear regression analysis showed that the thermal response is a nonlinear effect with temperaturechanges; and the NLARX with wavelet network solution is capable of accurately predicting thermal response and can help with interpretingmeasurements from continuous bridge health monitoring systems.

스마트 반·강접 복합접합부 구조물에 대한 요소 및 고등모델의 개발

허종완,김동건,최은수 한국복합신소재구조학회 2011 복합신소재구조학회 학술발표회 Vol.2011 No.04

본 연구는 개별적인 반·강접 복합접합부 구조물을 수치해석적인 방법을 통하여 거동성능을 조사하는 대 초점을 두고 있다. 강제 보와 콘크리트 충전기둥 (CFT) 사이에 저탄소 강 구속재와 초탄성 (Super-elastic) 형상기억합금 (SMA) 재료의 구속재를 이용하여 연결한 방식이 제안된 접합부 구조물의 가장 큰 특징이다. 이러한 설계는 초탄성 형상합금을 변형이 많이 일어나는 부분에 인장 바(Bar)로서 설치하여 복원현상을 기대할수 있다. 또한 저탄소 강재 바는 거동에 에너지 소산능력을 향상 시키는 대 기여한다. 반·강접 접합부는 단순한 핀이나 완전구속으로 모 델링이 불가능하므로 해석이나 설계가 실제로는 매우 복잡하다. 하지만 본 연구에서는 제안된 구조물의 장점과 특성을 검증하기 위하여 정밀한 유한요소(Finite Element) 방법을 이용하여 접합부의 전반적인 거동을 재현하였다.

고등적인 유한요소해석을 통한 콘크리트 취수탑의 지진 파괴 예측

허종완,김영찬,차영욱,임진선 한국복합신소재구조학회 2016 복합신소재구조학회논문집 Vol.7 No.4

This study mainly evaluate the aseismic performance of the existing intake tower structure, which is one of the national important infra structures, on the basis of the refined finite element (FE) analysis results. The realistic evaluation for structural damage was conducted by using the nonlinear material model that takes tension and compression strength of deteriorate concrete into consideration during FE modeling. In addition, not only tension crack but also compression crushing was analyzed by utilizing field contour functions provided in the program during nonlinear dynamic analyses when peak ground acceleration (PGA) occurred. After observing FE analysis results, it can be shown that the damage of the intake tower is the most likely to occur at the water level and the base support.

경기도 지진재해 대응 정책 방향 연구

허종완,김성환,손홍민,조한민,지우석 경기연구원 2017 정책연구 Vol.- No.-

최근 2008년 중국 쓰촨성 대지진(사망 7만여 명, 재산피해 160조원), 2011년 동일본 대지진(사망 2만여명, 재산피해 240조원) 등과 같은 대지진이 주변국을 포함하여 전 세계적으로 빈번히 발생하고 있다. 이로 인한 인명 및 재산피해는 기하학적인 수준에 다다르고 있다. 국내의 경우 1978년 진도 5.0 규모의 홍성 지진을 포함하여 1998년까지 불과 연평균 19.2회의 지진이 발생하였으나 1999년부터 현재까지 매년 평균 59.6회의 지진이 발생하여 그 횟수가 최근에 급격하게 증가하고 있다. 또한, 최근 경주, 대구 지역에서 발생한 지진은 진도 6으로 측정되었으며 전국 대부분 지역뿐만 아니라 일본, 중국 등에서 감지될 정도로 강력했다. 이렇듯 우리나라도 더 이상 지진으로부터 안전하지 못한 현실에 놓여있다. 본 연구가 대상으로 하는 경기도 지역은 내륙 지역으로 환태평양 지진대에서 가까운 동남쪽 해안가보다 지진에 대한 안전인식이 매우 낮다. 하지만 경기도 지역은 1990년대부터 2000년대까지 지진규모 2.0~3.0의 지진이 지속적으로 발생하고 있다. 따라서 본 연구에서는 경기도 지역의 내진설계 현황을 파악하여 지진 발생 시 건축물에 대한 위험성을 언급하여 경기도민의 안전인식을 고취시키고 피해 예방을 하고자 한다. 또한, 나아가 기존 건축물들의 내진성능 진단 및 보강에 대한 촉진을 위해 정책적인 방향을 언급하여 실질적인 제도가 정립될 수 있도록 하고자 한다. Recently, major earthquakes such as the Great Sichuan earthquake in 2008 (70,000 deaths and property damage of 160 trillion won) and the 2011 East Japan earthquake (20,000 deaths and property damage of 240 trillion won) have been occurring all over the world. The resulting loss of life and revenge is at a geometrical level. In Korea, an annual average of 19.2 earthquakes occurred in 1998, including the Hongseong earthquake with a magnitude of 5.0 in 1978. Since 1999, however, an average of 59.6 earthquakes have occurred each year, and the number of earthquakes has increased rapidly in recent years. In addition, recent earthquakes in Gyeongju and Daegu regions were measured to have a magnitude of 6, and they were strong enough to be detected in Japan as well as in China, as well as in most parts of the country. As such, our country is no longer safe from earthquakes. The Gyeonggi - do area, which is the subject of this study, has lower safety perception per se than the southeast coast near the Pacific Rim earthquake zone. However, in the Gyeonggi province, earthquakes with an earthquake magnitude of 2.0 ~ 3.0 are continuously occurring from Policythe 1990s to the 2000s. Therefore, in this study, the present condition of seismic design in Gyeonggi province is analyzed and the risk of buildings in case of an earthquake is mentioned to promote the safety awareness of Gyeonggi residents and prevent damage. Furthermore, in order to promote the diagnosis and reinforcement of seismic performance of existing buildings, we will refer to the policy direction and establish a practical system.