• Title/Summary/Keyword: detail of joint

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Exterior Joint Behavior of Low-Rise Reinforced Concrete Frame with Non-Seismic Detail (비내진 상세를 가진 저층 R.C조의 외부접합부 거동)

  • 김영문;기찬호;장준호;이세웅;김상대
    • Proceedings of the Korea Concrete Institute Conference
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    • 1998.04b
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    • pp.481-486
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    • 1998
  • In this paper, elastic and inelastic behavior of exterior joint of moment-resisting R.C frame with non-seismic detail subjected to reversed cyclic lateral load such as earthquake excitations was investigated. 1/2-scals subassemblage exterior beam-column joint including slab was manufactured based on similitude law. Then, pseudo static test under the displacement control was performed. The results of 1)crack pattern and failure mode, 2)degradation stiffness and strength, energy dissipation capacity from load-displacement hysteresis curve, 3)strain of steel were analysed.

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Inelastic Behavior of Continuous Precast Composite Slabs (연속 프리캐스트 합성바닥판의 비탄성 거동)

  • Shim Chang-Su;Chung Young Soo;Min Jin
    • Proceedings of the Korea Concrete Institute Conference
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    • 2005.05a
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    • pp.447-450
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    • 2005
  • A prefabricated composite hollow slab with perforated I-beams was suggested for the replacement of deteriorated concrete decks or the construction of new composite bridges with long-span slabs. Composite slabs with embedded I-beams have considerably higher stiffness and strength. For the application of prefabricated composite slabs to bridges, joints between slabs should satisfy the requirements of the ultimate limit state and the serviceability limit state. In this paper, three types of the detail for loop joints were selected and their structural performance in terms of strength and crack control was investigated through static tests on continuous composite slabs. A main parameter was the detail of the joint, such as an ordinary loop joint and loop joint with additional reinforcements. Even though there was no connection of the steel beams at the joints, the loop joints showed good performance in terms of strength. In terms of crack control, the loop joint with additional reinforcements showed better performance. In ultimate limit state, the continuous composite slabs showed good moment redistribution and ductility.

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Static behavior of novel RCS through-column-type joint: Experimental and numerical study

  • Nguyen, Xuan Huy;Le, Dang Dung;Nguyen, Quang-Huy
    • Steel and Composite Structures
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    • v.32 no.1
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    • pp.111-126
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    • 2019
  • This paper deals with experimental investigation and modeling of the static behavior of a novel RCS beam-column exterior joint. The studied joint detail is a through-column type in which an H steel profile totally embedded inside RC column is directly welded to the steel beam. The H steel profile was covered by two supplementary plates in the joint area in order to avoid the stirrups resisting shear in the joint area. Two full-scale through-column-type RCS joints were tested under static loading. The objectives of the tests were to examine the connection performance and to highlight the contribution of two supplementary plates on the shear resistance of the joint. A reliable nonlinear 3D finite element model was developed using ABAQUS software to predict the response and behavior of the studied RCS joint. An extensive parametric study was performed to investigate the influences of the stirrups, the encased profile length and supplementary plate length on the behavior of the studied RCS joint.

A Study on the Fatigue Design of Joint Detail of Vertical Stiffener in Two-Girder Bridge (2거더교의 수직보강재 연결상세부의 피로설계에 관한 연구)

  • Kwon, Soon Cheol;Kyung, Kab Soo;Park, Jin Eun
    • Journal of Korean Society of Steel Construction
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    • v.21 no.1
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    • pp.93-103
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    • 2009
  • Two-girder bridge is composed of primary members such as deck slab and main girder, and secondary member such as cross beam, vertical and horizontal stiffeners etc,. Two-girder bridge is prescribed as a non-redundant load path structure in the ASSHTO and the Korean Highway Bridge Design Code. Such structure is that if one girder is damaged, problems of function and safety of the bridge are caused. From the reasons, fatigue cracks in two-girder bridge can affect safety of the bridge seriously. Therefore, in this paper, fatigue evaluation was performed at connection parts of vertical stiffener and web with radius of curvature of scallop of vertical stiffener and thickness of web as variables. Such joint is known as a detail which has high possibility of fatigue crack in the bridge. Based upon the analytical results, preferable joint detail in terms of fatigue and simple empirical formula for fatigue evaluation of the detail were suggested.

Experiments on Longitudinal Joints of Precast Composite Hollow Slabs (프리캐스트 합성 중공바닥판의 교축방향 이음부에 대한 실험)

  • Shim, Chang-Su;Chung, Young-Soo;Kim, Dae-Ho;Min, Jin;Kim, Byung-Suk
    • Proceedings of the Korea Concrete Institute Conference
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    • 2004.05a
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    • pp.14-17
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    • 2004
  • A prefabricated composite hollow slab with perforated I-beams was suggested for the replacement of deteriorated concrete decks or the construction of new composite bridges with long-span slabs. Composite slabs with embedded I-beams have considerably higher stiffness and strength. For the application of prefabricated composite slabs to bridges, joints between slabs should satisfy the requirements of the ultimate limit state and the serviceability limit state. In this paper, three types of the detail for loop joints were selected and their structural performance in terms of strength and crack control was investigated through static tests on continuous composite slabs. A main parameter was the detail of the joint, such as an ordinary loop joint and loop joint with additional reinforcements. Even though there was no connection of the steel beams at the joints, the loop joints showed good performance in ultimate strength. In terms of crack control, the loop joint with additional reinforcements showed better performance. In ultimate limit state, the continuous composite slabs showed good moment redistribution and ductility.

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Analysis of finishing details to Prevent leakage of PC Apartment Joints in Korea (국내 PC 아파트 접합부 누수 방지를 위한 마감상세 분석)

  • Kim, Tae-Ho;Ko, Hyo-Jin
    • Journal of Korean Association for Spatial Structures
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    • v.21 no.4
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    • pp.81-89
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    • 2021
  • Recently, interest in OSC(Off Site Construction) is increasing due to the trend of a decrease in skilled workers and an increase in labor costs. In this regard, PC(Precast Concrete) is being reviewed for apartments, the most common type of housing in Korea. As the biggest concern for PC apartment houses, civil complaints such as inter-floor noise and leakage were presented. In this study, the details of the joints were reviewed based on the past cases of PC apartments, and the details of the recently constructed or planned PC apartments were investigated. Through this, the leakage path in the past was analyzed through the existing research literature and data. And wall type RC and PC apartment joint leakage test was performed and we found the needs for a detail of waterproof steps, sealant. Also, joint details were investigated for a rahmen type apartment housing under construction. At last, A discussion was conducted on the direction for a detailed proposal of an improved joint in the future.

A study on the strength characteristics of welded joints in aluminum carbody of rolling stock (알루미늄 철도차량 차체 용접부의 강도 특성에 관한 연구)

  • 서승일
    • Proceedings of the KWS Conference
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    • 2004.05a
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    • pp.290-292
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    • 2004
  • In this paper, static and fatigue load tests for the specimens, components and carbody were carried out to investigate the strength of welded joints in aluminum rolling stock. Tensile load test results showed that the static strength of welded joint for heat-treated alloys is reduced significantly and fatigue strengths are scattered by the welding imperfections. Component and whole carbody fatigue test results showed agreements with the design fatigue strength standards for specimens of same joint detail. Test results revealed that full penetration welding and strict management of welding procedure are crucial for securing strength of welded joint in aluminum carbody.

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A Study on Structural Plannings and Details (구조계획과 디테일에 관한 연구)

  • Park, Sun-Woo;Choi, Chui-Kyung
    • Journal of Korean Association for Spatial Structures
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    • v.9 no.1
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    • pp.53-60
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    • 2009
  • The purpose of this study is to explore the methodology of structural planning and detail, maintaining a close connection between architect and structural engineer. Actually it is difficult to solve a detail in a special structure, without investigation of structural behavior. In such a detail, it is hard to estimate the accurate flow of force, no more than a formative presentation. I will purpose to solve the processing of desirable detail, as a point of engineer's view, under the cooperative relationship between architect and structural engineer.

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Development of a Model for the Estimation of Knee Joint Moment at MVC (MVC 상태에서의 무릎관절 모멘트 추정을 위한 모델 개발)

  • Nam, Yoon-Su;Lee, Woo-Eun
    • Journal of Biomedical Engineering Research
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    • v.29 no.3
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    • pp.222-230
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    • 2008
  • This paper introduces a method of estimating the knee joint moment developed during MVC. By combining the Hill-type muscle model and analytic results on moment arm and musculotendon length change as a function of hip and knee joint angle, the knee joint moment at a specific knee joint angle during MVC is determined. Many differences between the estimated results and the experimental data are noted. It is believed that these differences originate from inaccurate information on the muscle-tendon parameters. The establishment of exact values for the subject's muscle parameters is almost impossible task. However, sensitivity analysis shows that the tendon slack length is the most critical parameter when applying the Hill-type muscle model. The effect of a change of this parameter on the muscle length force relationship is analyzed in detail.

A Study on Heat Transfer of an Underground Power Transmission Cable-Joint (지중송전케이블 접속부에서의 열전달에 관한 연구)

  • Park, M.H.;Kim, J.K.;Lee, J.H.
    • Korean Journal of Air-Conditioning and Refrigeration Engineering
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    • v.5 no.4
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    • pp.265-277
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    • 1993
  • Recently, underground transmission system is growing continuously according to the electric power demand increase in the downtown area. Even if domestic cable makers are manufacturing 154kV oil filled cable and joint, the design technology of cable-joint has not been fully self-reliance. This study is aimed at the detail heat transfer analysis of 154kV cable-joint. So, that is cut into the five sections in order to analyze a conjugate natural convection in two dimensional $r-{\theta}$ coordinate. The streamline and temperature distributions are obtained for each sections. Also the changes of those are analyzed with respect to the variation of transmission currents and cable-joint surface heat transfer coefficients. The same analyses are also shown in view point of the maximum temperature of conductor and local equivalent conductivity.

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