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공동주택의 중량충격원에 의한 진동전달 및 강성보강에 의한 진동저감효과 분석
노삼영(Sam-Young Noh),윤진호(Jin-Ho Yun) 한국생활환경학회 2007 한국생활환경학회지 Vol.14 No.3
After 1970's many wall-type multi-residential buildings have been constructed to solve the housing problem domestically. However noise and vibration troubles by the floor impact among households in the wall-type multi-residential building became an important issue with the increasing demand of living circumstances. To meet a new measure against this problem induced by the floor impact, vibration characteristics of the wall-type building should be investigated. The purpose of this study is to investigate the ratio of vibration transmission, comparing the experimental results with them of numerical analysis. The experiment was performed in a unit of a 15-stories multi-residential building. The slab of the living room was impacted with a standard bang machine, in which the acceleration response of the slab and the wall was measured. The results of the numerical analysis for a simplified model of a family unit with 100 ㎡ were compared with them of the experiment. The results showed that the vibration energy is mainly transmitted through the slab and the contribution of wall is not noticeable. Also, the effects of stiffening beam under or on the slab and the alteration of wall cross section area were shown by means of the numerical eigenfrequency analysis.
노삼영(Noh, Sam-Young),이상윤(Lee, Sang-Yun) 한국구조물진단유지관리학회 2010 한국구조물진단학회 학술발표회논문집 Vol.2010 No.2
Since the use of seawater for the cooling system in the domestic nuclear power plant influences on ecological system of the coast, developed countries use the cooling system by natural draught cooling towers. Due to the enormous scale and sensible characteristics of the structure against thermal and wind load, the maintenance and the repair of the structural damage, besides structural safety, cause enormous costs. Therefore the durability design of the cooling tower becomes a new issue. In this study a 30 years old natural draught cooling tower with serious damage state was non-linearly analysed and the damage process was evaluated.
노삼영 ( Noh Sam-young ),신은미 ( Shin Eun-mi ),김인수 ( Kim In-soo ) 한국구조물진단유지관리공학회 2009 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.13 No.2
A safe examination of structures have raised the most important problem because of the increasing age of buildings. The purpose of this study is understanding the damage location and degree of structures that the most primary structure forms, simple supported beam and two span beam. This study's process is following. First, we forced artificial damages on the finite element models, second, subjected to a statistic loading, found out the deformation after performing a finite element analysis. Finally, we understood the location and degree of damage using computed deformation. We performing using a finite element analysis program ANSYS, defined the damage with a lower value of bending stiffness El.
노삼영 ( Noh Sam-young ),권현호 ( Gown Hyeon-ho ),신동춘 ( Sin Dong-chun ),홍찬윤 ( Hong Chan-yun ),유성용 ( Yu Seong-yong ) 한국구조물진단유지관리공학회 2010 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.14 No.1
Sink-hole is a kind of ground settlements caused by collapse of the underground space when the important structure is constructed on the closed mine tunnel. Thus Sink-hole must be reinforced certainly. Therefore, in this study, experimental performance evaluation of Sink-hole-reinforcing slab is done by scaled model. In this time, rock and silt which is selected by soil condition, are used as ground model which scale is same ratio as reinforced slab. This experiment estimate through the stability of reinforced slab and the ground mutual behavior analysis.
노삼영 ( Noh Sam-young ),김길오 ( Kim Gil-oh ) 한국구조물진단유지관리공학회 2008 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.12 No.2
In this paper a tension stiffening model based on the bond-slip relationship is introduced and adopted in a finite multi-layered shell element formulation for surface structure analysis. The tension stiffening effect evaluated at the meso-level is taken into account in the constitutive law of reinforcement for the macro-level by defining a crack element at the Gauss point. The crack element is iteratively analyzed by means of a step-by-step integration, which allows application of any complicated bond laws. To define the crack element, a crack spacing model considers the crack formation grade. As a relevant factor in this tension stiffening concept, the reinforcement cracking stress may be evaluated by taking the fractile value of the concrete tensile strength. Through several simulations, the validity of the concept is systematically investigated under monotonic and cyclic loading.
수치 해석을 통한 동적 특성 기반의 구조물 손상지표 제시
노삼영 ( Noh Sam-young ),신은미 ( Shin Eun-mi ) 한국구조물진단유지관리공학회 2008 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.12 No.2
We have proposed to define structural damage measures in terms of global stiffness parameters wi. and offered a set of damage indicator D<sub>w,i</sub>. However, applying this concept a question arises how many indicators D<sub>w,i</sub> should be considered. In this paper we apply the improved damage indicator using the Effective Mass Ratio (EMR) or Modal Contribution Factor(MPF). By means of the new damage indicator considering the participation ratio of each eigen-mode, we can get a unique value as a damage index. Three numerical examples demonstrated the applicability of this new damage indicator.
CIP공법을 개량한 지하 영구벽체의 경제성 분석에 관한 연구
노삼영,김승훈,김갑수,박정태,홍성진 한국구조물진단유지관리학회 2011 한국구조물진단학회 학술발표회논문집 Vol.2011 No.9
In this research, the economic analysis with the current method of construction which is used like the CIP method+basement wall and slurry wall method as the underground permanent wall in order to evaluate the profitability of PUS was performed. At this time, the structure and construction condition used in the analysis considered the arbitrary environment and With respect to this, each basement wall was designed and the output of resources and construction cost was calculated and it applied to the analysis. At this time, the construction cost classified as the material cost, labor cost, and expenses and analyze.
분할 원호판 강관 두부 결합부의 구조 성능에 관한 실험적 연구
노삼영 ( Noh Sam-young ),박해인 ( Park Hai In ),박문상 ( Park Moon Sang ) 한국구조물진단유지관리공학회 2005 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.9 No.2
The connection system of steel pile and RC footing is an important structure because the total load of upper construction should be transferred through the joint construction of different two materials-steel and RC-with strongly changed section area. Although many connection systems have been developed, their structural and economical efficiency and workability are often insufficient. Therefore, a new connecting system was developed to improve the above mentioned problems of current systems. The divided arc plate could improve the workability and economical efficiency, structural efficiency could be reached by welding. The main purpose of the research is to evaluate the structural behavior of the new designed connection system through experiments.
중량충격원에 의한 라멘구조 공동주택의 동적특성에 관한 연구
노삼영 ( Noh Sam-young ),박일선 ( Park Il-sun ) 한국구조물진단유지관리공학회 2005 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.9 No.2
Due to the development of design and material technology in the architectural engineering, apartment buildings constructed with the wall type structure have been more spacious and the span of the structure will be longer. However, the structure with long span has generally inefficient damping effect of the floor heavy impact noise. For the present, the solution of this problem in the wall type structure could not be suggest. One of the effective solution for the problem could be the construction of apartment building with the rahmen structure. This study will show vibration properties of rahmen structures, which dominates the noise transfer in the structure, through comparing experiment results with ones of numerical analysis.