• 제목/요약/키워드: T-Joint

검색결과 1,644건 처리시간 0.026초

강관기둥과 PHC 파일을 연결하는 접합부에 관한 구조성능평가 (Structural Performance Evaluation of Joint between PHC Pile and Steel Tube Column)

  • 김상봉;오진탁;김영식;주영규
    • 한국공간구조학회논문집
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    • 제15권3호
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    • pp.85-93
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    • 2015
  • This paper presents a foundation pile to steel column connection that can resist large magnitude of moment and that can be easy installed. The developed joint has spherical shape and it is given the name HAT joint to mean Hallow half-sphere steel joint. Four types of HAT joints are developed. Namely, H-type, T-type, P-type and K-type. In this paper I will talk about the performance assessment of T-type(Tube Column) and P-type(Pile Column) of HAT joints with finite element analysis and experiment on a full scale model is presented.

마찰용접 된 박판재의 용접부 특성에 대한 실험 비교 (Experimental Comparison of Weld Zone Properties for $2mm^{t}$ Aluminum Alloy Sheets Friction-Stir-Welded using Milling Machine.)

  • 한민수;장석기;이돈출
    • 대한기계학회:학술대회논문집
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    • 대한기계학회 2003년도 추계학술대회
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    • pp.1747-1751
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    • 2003
  • The paper shows properties such as vickers hardness, yielding and ultimate stresses for the weld zone of the butt and the lap jointed specimens, and compare maximum loads, stress-strain curves, deformation appearance after guided bending test and fracture appearance for butt and lap jointed specimens. The research in this experiment also shows the weldability of the butt joint specimen is better than that of the lap joint specimen using FSW with $2mm^{t}$ aluminum alloy sheet in milling machine.

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내부 환보강 X형 및 T형 관이음부의 강도산정과 최적설계 (Strength Prediction and Optimum Design of Internally Ring-Stiffened Tubular X-and T-Joints)

  • 조현만;류연선;이현진
    • 한국전산구조공학회:학술대회논문집
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    • 한국전산구조공학회 2007년도 정기 학술대회 논문집
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    • pp.315-320
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    • 2007
  • An effective reinforcement method for steel tubular joints having a large chord diameter is the use of internal ring stiffeners. This paper presents the results of a numerical study on the static strength of internally ring-stiffened tubular X- and T-joints subjected to brace axial compression loading. Nonlinear finite element analyses are used to compute the joint strength. The influence of geometrical parameters has been studied and the maximum reinforcement effect of a ring stiffener has been evaluated. A strength ratio is defined. by the ratio of ring-stiffened joint strength to unstiffened joint strength, and an equation for this strength ratio is derived by regression analysis. Design optimization for ring stiffener of tubular joints is carried out using metropolis genetic algorithm.

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A Study on Joint Coding System using VF Arithmetic Code and BCH code

  • Sukhee Cho;Park, Jihwan;Ryuji Kohno
    • 한국정보보호학회:학술대회논문집
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    • 한국정보보호학회 1998년도 종합학술발표회논문집
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    • pp.537-545
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    • 1998
  • This paper is the research about a joint coding system of source and channel coding using VF(Variable-to-fixed length) arithmetic code and BCH code. We propose a VF arithmetic coding method with EDC( Error Detecting Capability) and a joint coding method in that the VF arithmetic coding method with EDC is combined with BCH code. By combining both the VF arithmetic code with EDC and BCH code. the proposed joint coding method corrects a source codeword with t-errors in decoding of BCH code and carries out a improvement of the EDC of a codeword with more than (t+1)-errors in decoding of the VF arithmetic coding with EDC. We examine the performance of the proposed method in terms of compression ratio and EDC.

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어린이집에서 24-36개월 영아-교사 간 공동주의와 영아의 어휘력간의 관계 (Relationships between Toddler-teacher Joint Attention and Toddlers' Vocabularies)

  • 김명순;이가현
    • 아동학회지
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    • 제30권5호
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    • pp.155-165
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    • 2009
  • This study was conducted to identify relationships between toddler-teacher joint attention and toddlers' vocabularies. Toddlers' vocabularies were assessed by the MacArthur Communicative Development Inventory-Korean (MCDI-K) modified by Kim (2006); joint attention episodes were observed by classification categories for engagement condition (Bakeman & Adamson, 1984). Data were analyzed by means, t-test and Pearson's correlations. Results were that : (1) receptive vocabulary of toddlers was about 1.1 times as high as their expressive vocabulary. (2) Coordinated joint attention was observed most frequently, followed by supported joint attention; coordinated joint attention was closely related to support joint attention. (3) The relationship between toddler-teacher joint attention and toddlers' vocabularies were significant in a positive direction.

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Study on seismic behavior of fabricated beam-column bolted joint

  • Zhang, Yu;Ding, Kewei
    • Structural Engineering and Mechanics
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    • 제82권6호
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    • pp.801-812
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    • 2022
  • To better promote the development of fabricated buildings, this paper studies the seismic behavior of precast concrete beam-column bolted joint under vertical low cyclic loading. The experimental results show that cracks appear in the beam-column joint core area. Meanwhile, the concrete and the grade 5.6 bolts are damaged and deformed, respectively. Specifically, the overall structure of the beam-column joint remains intact, and the bolts have good energy dissipation capacity. Based on the experimental study, a new method of beam-column bolted connection is proposed in simulation analysis. The simulation results show that the bolts deform in the core area of the new beam-column joint, which enhances the concrete shear capacity legitimately and protects the T-end of the beam against shear failure. To summarize, both the experimental joint and the simulated joint prolong the service life by replacing the bolts under the seismic loading. The research results provide a reference for applications of the fabricated beam-column joint.

JOINT WEAK SUBNORMALITY OF OPERATORS

  • Lee, Jun Ik;Lee, Sang Hoon
    • 충청수학회지
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    • 제21권2호
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    • pp.287-292
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    • 2008
  • We introduce jointly weak subnormal operators. It is shown that if $T=(T_1,T_2)$ is subnormal then T is weakly subnormal and if f $T=(T_1,T_2)$ is weakly subnormal then T is hyponormal. We discuss the flatness of weak subnormal operators.

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Nd:YAG 레이저를 이용한 자동차 배터리용 SS41 다층박판 이종두께 T형상 용접 특성 (T-joint Welding Characteristics of Multi-thin Plate Dissimilar Thickness of SS41 of Automobile Battery by using Nd:YAG Laser)

  • 양윤석;황찬연;유영태
    • 한국정밀공학회지
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    • 제29권10호
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    • pp.1078-1088
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    • 2012
  • In this paper, we present research experimental results about the different thickness T-joint welding of the high power continuous wave(CW) Nd:YAG laser for the secondary battery of a vehicle. Although the conventional method used for the secondary battery is a argon TIG welding, we utilize a laser welding to improve Tungsten Inert Gas(TIG) welding's weakness. The laser, which has a couple of advantage such as aspect ratio, low Heat Affected Zone(HAZ), good welding quality and fast productivity utilized in this work is a CW Nd:YAG laser. In order to observe laser welding sections, we used a optical microscope. Through the analysis of the metallographic, hardness, aspect ratio, and heat input, we obtained the desired data in condition of 1800 W laser beam power and 1.8 m/min and 2.0 m/min laser beam travel speeds. In order to compare electric resistances of the argon TIG welding and laser welding, we made an actual battery and the electric resistance of the laser welding is reduced by 40~45% comparing with the argon TIG welding.

지역사회 여성 독거노인을 위한 '스스로 관절관리' 프로그램의 적용 효과 (Effect of the Arthritis Self-management Program on Elderly Women Living Alone in the Community)

  • 조무용;김대숙
    • 근관절건강학회지
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    • 제31권1호
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    • pp.1-11
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    • 2024
  • Purpose: This study aimed to evaluate the effects of an arthritis self-management program on elderly women living alone in the community. Methods: This study recruited 36 individuals, who participated in the program once a week for six weeks at two community centers. The program consisted of muscle strengthening and flexibility exercises, health education on muscles and joints, and joint dance for aerobic exercise. The data collected were analyzed using the paired t-test and Wilcoxon rank test. Results: After six weeks, participants showed significant improvements in pain (t=3.03, p=.005), difficulties in activities of daily living (t=2.77, p=.010), health-related quality of life (t=-2.63, p=.014), flexibility of right shoulder (z=-2.42, p=.015), and balance (right leg, t=-2.63, p=.036; left leg, z=-2.36, p=.018). Conclusion: The results showed that the arthritis self-management program effectively improved outcomes for elderly women living alone. Thus, this program could be incorporated into various programs for elderly people living alone.

인공관절 전치환 성형 수술 전후의 일상활동 장애정도 및 삶의 만족도 비교연구 - 관절 질환 환자를 중심으로 - (A Comparative Study of the Handicaps in and Satisfaction with the Ordinary Life before and after the Plastic Operation for Artificial Joint Replacement-Centering around Those Who suffer from Joint Diseases)

  • 강신화
    • 근관절건강학회지
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    • 제3권1호
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    • pp.37-49
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    • 1996
  • The joint diseases threaten modern people's healthy life. They bring about a long pain, an anasarca, loss of joint function or even deformation and rigidity of joint, limiting people's ordinary activities much. The chronic joint patients may be subject to some hypochondria caused by anxiety for their life, social isolation, financial problem and physical disability. Therefore, this population should continue to be duely taken care of by medical personnels. In particular, nurses should adequately help these people to recover and improve their health through suitable adaptations. With such basic conceptions in mind, this study was aimed at reviewing these patients' conditions in their ordinary life before and after a plastic operation for artificial joint replacement as well as their satisfaction with their life. For this purpose, those patients who underwent some plastic operations for artificial joint replacement at university hospitals in Seoul from January 2, 1993 to June 30, 1995 were selected as the population of this study. Among them, 87 people were randomly sampled to answer a questionnaire designed specially. For the surveying tools, Jette's (1980) scale was applied to address the sample people's inconveniences experienced and supports received in their ordinary life, while the scale of Wood, Wylie & Sheafer was used to measure their satisfaction with their life. The collected data were analyzed for percentiles, means, SD, t-test and Pearson's correlations. The results of survey can be summarized as follows ; As a result of t-test the frequencies of other people's support before and after the plastic operation, it was disclosed that those who underwent the operation were supported less frequently. In addition, as a result of t-testing their satisfaction with life before and after the operation, it was found that the operation increased their satisfaction with life significantly. Meanwhile, as a result of t-test inconveniences, frequencies of supports and life satisfaction before and after the plastic operation for artificial knee replacement, it was disclosed that only the inconveniences were significantly reduced after the operation. In contrast, the t-test the variables before and after the plastic operation for artificial hip replacement, it was found that only the frequencies of other people's supports were significant reduced after the operation. Furthermore, the differences 6 months, one year and two years after the plastic operation for artificial joint replacement were t-tested on the variables. As a result, it was disclosed that people's inconvenience, frequencies of supports and life satisfaction were not improved 6 months after the operation but their frequencies of supports decreased significantly one year after, while their inconveniences and life satisfaction were significantly improved two years after. As a result of analyzing the variables with Pearson's correlations, inconveniences and frequency of supports were negatively correlated significantly with the life satisfaction. In conclusion, the plastic operation for artificial joint replacement significantly improved people's living inconveniences, reduced their frequency of other people's support and enhanced their satisfaction with life. To break don the plastic operation for artificial knee replacement improved patients' inconveniences, while the plastic operation for artificial hip replacement not only improved patients' inconveniences but reduced the frequencies of other people's support also. Finally, the finding that the plastic operation for artificial joint replacement brought about the improvement two years after suggests that this period is needed for the patients to adapt themselves to the post-operation conditions.

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