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Wind Fragility of Glass Windows with Tape and Film Reinforcement
Sim,Viriyavudh,Jung,WooYoung 한국방재학회 2019 한국방재학회논문집 Vol.19 No.6
강풍에 의한 손상은 보나 기둥 등 주구조요소에 대한 피해보다는 대부분의 손상피해가 지붕, 창문 등의 비구조요소에 주로 발생한다. 본 연구에서는 국립방재연구원에서 수행한 창호내풍성능시험 결과를 토대로 아파트 창호에 사용된 유리부재의 보강방법에 따른 취약성 평가를 연구하였다. 성능실험에서는 16mm 두께의 유리와 5mm 두께의 유리, 테이프로 보강된 16mm 두께의 유리, 필름으로 보강된 5mm 두께의 유리 등 총 4종류의 창호 내 유리 시험체에 대하여 내풍성능을 실험하였으며 이들 결과를 토대로 5층 및 10층 아파트 시공 시 각각 강풍 취약도 평가를 수행하였다. 다양한 내풍조건을 모사하기 위하여 몬테카를로 시뮬레이션 기법을 적용하여 유리창 표면에 발생 가능한 풍속을 생성하였으며 이후 유리의 보강성능에 따라 각각의 확률론적 강풍 취약성을 평가하였다. 본 연구를 통하여 도출된 결과는 강풍 발생 시 시공된 유리의 보강방법에 따라 예상되는 손상확률을 결과적으로 제시하였다. Damages caused by strong winds are not restricted to main load-bearing structural elements such as beams and columns. Most damages are attributed to a breach in the envelope structures such as the roof, window, and door. In this study, the wind fragility of the glass used in residential apartment windows was developed based on the results of a window aerodynamic performance test report from the Korea National Disaster Management Research Institute. Four types of window glass systems were tested, which included 16 mm and 5 mm glass without attachments, 16 mm glass with tape reinforcement, and 5 mm glass with film reinforcement. Furthermore, to simulate the usage of these glasses in apartment windows, two simplified 5- and 10-storey building models were created to represent low-rise and high-rise buildings, respectively. Both building models consisted of one glass window on each floor. Subsequently, the Monte Carlo simulation method was used to generate random wind on the glass window surface, and the probabilities of failure as well as analytical fragilities were determined. A comparison between the glass windows in each building model and that between the different glass reinforcements was conducted. The fragility parameters showed a failure wind speed similar to the values determined in the experiment. However, the probabilistic results had more potential to precisely explain the performance of glass windows in terms of the expected failure probability, compared with the deterministic results that had only two explanations, i.e., the glass breaks or does not break at a specific wind speed.
Wind Fragility of Glass Windows with Tape and Film Reinforcement
Sim Viriyavudh,정우영 한국방재학회 2019 한국방재학회논문집 Vol.19 No.6
Damages caused by strong winds are not restricted to main load-bearing structural elements such as beams and columns. Most damages are attributed to a breach in the envelope structures such as the roof, window, and door. In this study, the wind fragility of the glass used in residential apartment windows was developed based on the results of a window aerodynamic performance test report from the Korea National Disaster Management Research Institute. Four types of window glass systems were tested, which included 16 mm and 5 mm glass without attachments, 16 mm glass with tape reinforcement, and 5 mm glass with film reinforcement. Furthermore, to simulate the usage of these glasses in apartment windows, two simplified 5- and 10-storey building models were created to represent low-rise and high-rise buildings, respectively. Both building models consisted of one glass window on each floor. Subsequently, the Monte Carlo simulation method was used to generate random wind on the glass window surface, and the probabilities of failure as well as analytical fragilities were determined. A comparison between the glass windows in each building model and that between the different glass reinforcements was conducted. The fragility parameters showed a failure wind speed similar to the values determined in the experiment. However, the probabilistic results had more potential to precisely explain the performance of glass windows in terms of the expected failure probability, compared with the deterministic results that had only two explanations, i.e., the glass breaks or does not break at a specific wind speed.
Wind Fragility of Steel and Carbon-Fiber Reinforced Plastic Single-Span Greenhouses
Sim Viriyavudh,정우영 한국복합신소재구조학회 2020 복합신소재구조학회논문집 Vol.11 No.1
In this study, the probabilistic performances of greenhouses made of steel and carbon-fiber reinforced plastic, when subjected to wind loads, were compared. Wind fragility was used to estimate the failure probability in the case of strong wind. The finite element model of a single-span vinyl greenhouse was developed based on the specifications published by the Rural Research Institute of the Republic of Korea; the failure state could be determined by comparing the structural analysis results with the limit state of the structure. Ten thousand greenhouses under randomly generated wind pressures were simulated via the Monte Carlo method to estimate the failure probability as a function of the wind speed. The global horizontal and vertical deformation limit states were also considered. The steel-frame greenhouse exhibited the best performance and the horizontal deformation limit state was the predominant factor in the single-span greenhouse failure under the investigated loading conditions.
에폭시 재료특성 변화에 따른 FRP-Concrete경계면의 부착강도 및 유효부착길이 평가
손호영,Sim Viriyavudh,정우영 한국복합신소재구조학회 2016 복합신소재구조학회 학술발표회 Vol.2016 No.04
This research presents assessmental FRP plate, one of materials used for reinforcing damage of RC structure caused by deterioration. in order to investigate effective bonding length and bonding strength according to material property of epoxy used for bonding between FRP-Concrete, experimental tests for 3 specimens with each bonding length of 50,100,150,200and 250mm respectively are performed. test results indicate frat material property of epoxy can affect effective bonding length of FRP-Concrete.
김성도,Sim ViriyaVudh,곽용주,정우영 한국복합신소재구조학회 2017 복합신소재구조학회 학술발표회 Vol.2017 No.04
Climate change resulted in the growing occurrence frequency of typhoons, and the damage it caused was also increasing. In this study, the soundproofing and windproof walls installed on the domestic road were modeled by using ABAQUS, a commercial finite element analysis program. Correspondingly, steel column, aluminum frame and transparent acrylic plate were modeled. Based on the result from individual part of soundproof wall model, the number of soundproof wall parts for optimal design was determined to be five parts. The design standard of road construction barrier was applied to this optimum model to perform the safety evaluation for strong wind disaster. In the future, it will be possible to improve the guidelines for design of soundproofing walls in Korea by carrying out further experiment to increase the reliability of safety evaluation of soundproofing walls.
GFRP 복합재료 프레임으로 시공된 방음벽의 강풍 취약도 평가
김성도,Sim ViriyaVudh,곽용주,전오현,정우영 한국복합신소재구조학회 2018 복합신소재구조학회 학술발표회 Vol.2018 No.04
Recently, the damage caused by typhoons and strong winds are increasing due to the world climate change. Considering the vulnerability of structure to strong wind disaster, in this study, we focused on the soundproof wall among vulnerable wind facilities. GFRP was chose as the reinforcement frame among the components of the soundproof wall. The modeling of the soundproof wall was made using the finite element commercial analysis program ABAQUS and the resistance performance was estimated through the optimal model analysis of the soundproof wall. Wind loads were calculated using Monte Carlo Simulation. Finally, wind fragility evaluation was performed to predict the degree of damage of the GFRP frame soundproof wall. It is necessary to verify the performance of the GFRP frame through comparison with the aluminum frame which is generally used in the construction of the soundproofing wall.
응급 내진복구용 에너지 흡수형 GFRP-파형강판 Hybrid형 내력패널 성능평가
우필호,주부석,정우영,손호영,Sim Viriyavudh 한국복합신소재구조학회 2015 복합신소재구조학회 학술발표회 Vol.2015 No.04
This study proposed new method using FRP material for emergency earthquake recovery in a building, since the classical materials such as concrete and steel was difficult to construct and fabricate during and after an earthquake. Also, the characteristics of FRP materials was much light and stronger in comparison to other materials. Therefore, the seismic performance of frame structures subjected to an earthquake, using precast GFRP-Corrugated infilled panel was conducted in this study.