• 제목/요약/키워드: frame material

검색결과 796건 처리시간 0.026초

회전형 Friction Damper의 거동 특성 연구 (Performance of Rotational Friction Dampers Under earthquake excitation)

  • 배춘희;박영필
    • 한국소음진동공학회:학술대회논문집
    • /
    • 한국소음진동공학회 2004년도 춘계학술대회논문집
    • /
    • pp.810-813
    • /
    • 2004
  • A study on the dynamic response of single-storey steel frames equipped with a rotational friction damper is presented. Extensive testing was carried out for assessing the friction pad material, damper unit performance and foaled model frame response to lateral harmonics excitation. Numerical simulations based on non-linear time history analysis were used to evaluate the seismic behaviour of steel frames with rotational frictional damper. It Is demonstrated that using discrete friction dampers of proper parameters to link steel frame can reduce dynamic response significantly.

  • PDF

자동차 리어사이드 프레임에 대한 스프링백 특성연구 (A Study on the Characteristics of springback about an automobile rear side frame)

  • 신용승
    • 한국소성가공학회:학술대회논문집
    • /
    • 한국소성가공학회 1999년도 춘계학술대회논문집
    • /
    • pp.57-61
    • /
    • 1999
  • Springback after forming is the critical factor affecting the product quality. It is very difficult to predict the amount of springback not only because of complex geometry and material characteristics of the stamping product but because the methodology has not been established. In this study springback mechanism is introduced and experimental tryout and computer simulation are carried out for die design of automotive rear side frame. Futher springback was verified by comparing the result of computer simulation with the measured tryout result.

  • PDF

Reliable Design of the Frame for Tension Type CRT

  • Bae, Joon-Soo;Lee, Byeong-Yong;Cho, Sang-Myung
    • 한국정보디스플레이학회:학술대회논문집
    • /
    • 한국정보디스플레이학회 2002년도 International Meeting on Information Display
    • /
    • pp.355-358
    • /
    • 2002
  • The deformation behavior of the frame for tension mask CRT is investigated by experiments and finite element method. We calculate and measure the stress-strain relation at the stress concentrations. The endurance test at 100$^{\circ}C$ was performed for checking tension decrease with time.

  • PDF

반복 하중을 받는 강 구조 부재 및 골조의 탄소성 성상에 관한 해석적 연구 (An analytical Study on the Elasto-Plastic Behaviour of Steel Structure Member & Frame under Cyclic Load)

  • 김화중;권영환;박정민
    • 한국전산구조공학회:학술대회논문집
    • /
    • 한국전산구조공학회 1992년도 가을 학술발표회 논문집
    • /
    • pp.52-57
    • /
    • 1992
  • The purpose of this study is that to develop computer program, which is about to analy size nonlinear behaviour of elastic framed structures include to geometric & material nonlineality, and to formulate between stress-strain relationship. In order to examplity the efficiency of this program, a few analytical results have been obtained on : (1) nonlinear behaviour of beam which is subject to vertical force (2) nonlinear behaviour of portal frame which is subject to vertical & horizontal force.

  • PDF

Damage-Based Seismic Performance Evaluation of Reinforced Concrete Frames

  • Heo, YeongAe;Kunnath, Sashi K.
    • International Journal of Concrete Structures and Materials
    • /
    • 제7권3호
    • /
    • pp.175-182
    • /
    • 2013
  • A damage-based approach for the performance-based seismic assessment of reinforced concrete frame structures is proposed. A new methodology for structural damage assessment is developed that utilizes response information at the material level in each section fiber. The concept of the damage evolution is analyzed at the section level and the computed damage is calibrated with observed experimental data. The material level damage parameter is combined at the element, story and structural level through the use of weighting factors. The damage model is used to compare the performance of two typical 12-story frames that have been designed for different seismic requirements. A series of nonlinear time history analyses is carried out to extract demand measures which are then expressed as damage indices using the proposed model. A probabilistic approach is finally used to quantify the expected seismic performance of the building.

강재틀 옹벽 거동에 관한 연구 (A Study on the Behavior of the Steel Retaining Wall)

  • 김승환;이영생;조우연
    • 한국지반공학회:학술대회논문집
    • /
    • 한국지반공학회 2005년도 춘계 학술발표회 논문집
    • /
    • pp.569-574
    • /
    • 2005
  • The steel retaining wall(s.r.w) are not constructed broadly all over the world. So the method of the analysis and the estimation for the behavior of the s.r.w. the interactive behavior of the frame and the fill material. In this study, the numerical analysis using F.E.M. was made to analize the mutural relation of the frame and the fill material in prior to the s.r.w. model test.

  • PDF

가구 및 목창호재에서 방출되는 유해화학물질의 특성 (The Characteristics of VOCs and Formaldehyde emitted from the furnitures and frame material of windows and doors)

  • 박용승;유복희;조현;홍천화
    • 한국주거학회:학술대회논문집
    • /
    • 한국주거학회 2004년도 추계학술대회 논문집
    • /
    • pp.315-318
    • /
    • 2004
  • In recent days, IAQ(Indoor Air Quality) is regarded as one of the most important environmental factors as well as thermal and acoustic comfort. The purpose of this study was to estimate on effect of indoor air pollution from VOCs and formaldehyde emitted by building materials. As the results, we knew that concentration of Toluene, Xylene, Styrene and HCHO emitted from the furnitures and frame material of windows and doors are high emission factors on indoor air pollution.

  • PDF

MPI를 이용한 PSC 프레임 비선형해석 프로그램의 병렬화 (Parallel Implementation of Nonlinear Analysis Program of PSC Frame Using MPI)

  • 이재석;최규천
    • 한국전산구조공학회:학술대회논문집
    • /
    • 한국전산구조공학회 2001년도 봄 학술발표회 논문집
    • /
    • pp.61-68
    • /
    • 2001
  • A parallel nonlinear analysis program of prestressed concrete frame is migrated on a PC cluster system and a massively parallel processing system, CRAY T3E system, using MPI. The PC cluster system is configured with Pentium Ⅲ class PCs and fast ethernet. The CRAY T3E system is composed of a set of nodes each containing one Processing Element (PE), a memory subsystem and its distributed memory interconnect network. Parallel computing algorithms are implemented on element-wise processing parts including the calculation of stiffness matrix, element stresses and determination of material states, check of material failure and calculation of unbalanced loads. Parallel performance of the migrated program is evaluated through typical numerical examples.

  • PDF

고장력 강판을 적용한 Seat Back Frame의 레이저용접에 관한 연구 (A Study on Laser Welding of the Seat Back Frame Applied by High Strength Steels)

  • 설현욱;정병훈;김석원
    • Journal of Welding and Joining
    • /
    • 제35권3호
    • /
    • pp.62-67
    • /
    • 2017
  • The automotive industry is in constant pursuit of alternative materials and processes to address the ever changing needs of their customers and the environment. Applications of laser welding have increased steadily in recent years due to its benefits including high speed, high productivity, and high energy density of heat source. This paper investigated the relationship between laser welding parameters and penetration characteristics. The Welding power was fixed at 5kW and welding speeds were varied for the thickness of the workpiece material. Full penetration occurred in the energy per unit area of $21J/mm^2$. The hardness of the weld zone was different for each strength of the workpiece material, however the lowest hardness values were the same in the heat-affected zone.

Experimental and numerical investigations into the composite behaviour of steel frames and precast concrete infill panels with window openings

  • Teeuwen, P.A.;Kleinman, C.S.;Snijder, H.H.;Hofmeyer, H.
    • Steel and Composite Structures
    • /
    • 제10권1호
    • /
    • pp.1-21
    • /
    • 2010
  • As an alternative for conventional structures for tall buildings, a hybrid lateral load resisting structure has been designed, enabling the assembly of tall buildings directly from a truck. It consists of steel frames with discretely connected precast concrete infill panels provided with window openings. Besides the stiffening and strengthening effect of the infill panels on the frame structure, economical benefits may be derived from saving costs on materials and labour, and from reducing construction time. In order to develop design rules for this type of structure, the hybrid infilled frame has recently been subjected to experimental and numerical analyses. Ten full-scale tests were performed on one-storey, one-bay, 3 by 3 m infilled frame structures, having different window opening geometries. Subsequently, the response of the full-scale experiments was simulated with the finite element program DIANA. The finite element simulations were performed taking into account non-linear material characteristics and geometrical non-linearity. The experiments show that discretely connected precast concrete panels provided with a window opening, can significantly improve the performance of steel frames. A comparison between the full-scale experiments and simulations shows that the finite element models enable simulating the elastic and plastic behaviour of the hybrid infilled frame.