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석고 패널이 부착된 천장 시스템의 내진성능 평가를 위한 3축 진동실험
박해용(Park, Hae-Yong),전법규(Bub-Gyu Jeon),김재봉(Jae-Bong Kim),김민욱(Min-Uk Gim) 대한건축학회 2019 大韓建築學會論文集 : 構造系 Vol.35 No.10
In this study, a full scale 3-axes shake table test for M-bar and T-bar type ceilings commonly used in the country was conducted. Through damage inspection during the test, seismic performance of ceilings according to variables, such as clearance between wall mold and ceiling as well as existence of facilities, was evaluated. A test frame consisted of square hollow section members was used for the shake table test. The experimental method was performed as a fragility test using required response spectrum described in ICC-ES AC156. In the case of architectural nonstructural component that contain ceilings, it mainly is evaluated the performance by post-test visual inspection. For the evaluation of seismic performance of ceilings, this study classified and defined damaged items for targeted ceiling system referring to illustrative damage according to nonstructural performance levels accordance with ASCE 41 and previous studies. And proposed illustrative damage items classification was utilized to compare the degree of the damage according to experimental variables. The experiment results confirmed that differences in boundary conditions due to the clearance at wall mold and the installation of facilities had a significant effect on the seismic performance of the ceiling.
국내 프로축구 심판의 근골격계 통증에 관한 기초연구 -전수 조사-
박해용 ( Hae Yong Park ),최영인 ( Young In Choi ) 대한스포츠의학회 2014 대한스포츠의학회지 Vol.32 No.1
The environment around working process of the referees during matches will burden him or her physically by doing specific actions frequently and give negative effects on musculoskeletal system. In order to find out musculoskeletal pain has occurred on specific muscles, surveys have been taken by 44 referees in K-league for this thesis. We evaluated the differences between referee and assistant referee. Fourteen (87.5%) referees and twenty-four (89.3%) assistant referees stated that they had one musculoskeletal pain. For referees, 43.8% had hamstring pains, 31.3% had calf muscle pains, and 25% had low back pains. For assistant referees, 39.3% felt knee pains, 32.1% had adductors pains, 28.5% felt calf muscle pains. Therefore, with the data analysis by dividing their roles, both groups had similar effect on hamstring and knee joint. For the question asking for the personal reasons of the pains were 61.4% of ‘Carelessness of physical fitness’, 47.7% of ‘repetition of certain actions’, and 43.2% of ‘lack of treatment after being damaged’. Also, in order to prevent pain, the referees answered that they train personally (40.9%), rest appropriately (20.5%), and go to hospital for treatment (18.2%). After receiving the result of this study, training programs and education are needed to prevent pain. Moreover, on the next study, fundamental causes of the pains should be found by using history taking, physical examination, medical and scientific machines in order to analyze the movements of the referees` human dynamics.