• Title, Summary, Keyword: 전단 저항성능

Search Result 141, Processing Time 0.056 seconds

Structural Behavior of Reinforced Concrete Beams using High Strength Shear Reinforcement (고강도 전단보강 철근을 사용한 철근콘크리트 보의 거동평가)

  • Choi, Im-Jun;Park, Jong-Wook;Hwang, Hyun-Bok;Lee, Jung-Yoon
    • Proceedings of the Korea Concrete Institute Conference
    • /
    • /
    • pp.3-4
    • /
    • 2009
  • This study predicts the structural behavior of RC beams using high strength shear reinforcement and evaluates current design codes restricting the strength of shear reinforcement steel. Under the present design codes, the yield strength of shear reinforcement steel is restricted to 400MPa. In case that use high yield strength reinforcement steel, could incure heavily crack and deflection at the members of structure, and have not verified ductility capacity, fatigue resisting capacity, shear and torsion resisting capacity, anchoring capacity and seismic capacity. To this end, we evaluate structural behavior of reinforced concrete beams using high strength shear reinforcement.

  • PDF

Estimation of Moment Resisting Property for Pin Connection Using Shear Strength of Small Glulam Specimens (집성재 소시험편의 전단강도에 의한 핀접합부의 모멘트 저항성능 예측)

  • Hwang, Kweonhwan;Park, Joosaeng
    • Journal of the Korean Wood Science and Technology
    • /
    • v.36 no.4
    • /
    • pp.58-65
    • /
    • 2008
  • Most connections for the glulam structural members consisted of connector and fastener. The mechanical behaviour of the connection can be occurred by the dowel bearing resistance and wood shear by the fastener. This study aims at the examination of the shear properties for the small specimen with lamination components and for the full-sized pin connection and the moment resisting property for the double shear full-sized pin connection using structural column and beam members. Small specimens including glue line shows greater density and shear strength by the lamination effect than other specimens. It is needed that estimations of double shear property and moment resistance for the pin connections should be adjusted in some degree. For the better and safe estimation of moment resistance strength for the column-beam pin connection, however, the shear strength of small specimens should be deducted by 10%.

The Structural Behavior and Performance by Span-to-Depth Ratio in Composite Structure of Sandwish System (셀 형상비에 따른 강.콘크리트 복합구조체의 구조적 거동 및 성능)

  • 정연주;정광회;김병석
    • Journal of the Computational Structural Engineering Institute of Korea
    • /
    • v.14 no.2
    • /
    • pp.181-192
    • /
    • 2001
  • 이 논문은 샌드위치식 강-콘크리트 복합구조체에서 상하 강판과 격벽으로 구성되는 셀의 형상비가 거동과 성능에 미치는 영향을 다루었다. 이 구조체에서 셀 형상비는 하중전달 메카니즘과 하중분배능력을 변화시킨다. 따라서 셀 형상비에 따라 부재의 응력수준과 하중저항능력이 변화한다. 이 연구에서는 셀 형상비가 이 구조체의 거동과 성능에 미치는 영향을 규명하기 위해, 두 종류의 샌드위치식 복합구조체에 대해 다양한 셀 형상비를 설정하여 비선형 구조해석을 수행하였다. 해석결과로부터 셀 형상비에 따른 하중전달 메카니즘과 부채 응력에서의 차이점을 도출하였으며, 이들 차이점을 바탕으로 셀 형상비가 전단성능, 휨성능, 하중저항성능에 미치는 영향을 분석하였고, 파괴모드와 연성에 미치는 영향에 대해서도 간략히 언급하였다. 연구결과, 셀 형상비가 증가함에 따라 하부 강판과 콘크리트의 응력수준이 낮아지는 결과를 나타내었다. 이것은 각 부재의 유효휨강성과 유효전단강성 증가를 나타내며, 따라서 구조체의 하중저항성능도 향상되는 것으로 판단된다. 특히 셀 형상비의 증가에 따른 성능향상에서 전단성능이 휨성능에 비해 더 큰 효과를 나타내며, 이러한 차이는 파괴모드와 연성에도 영향을 미칠 것으로 판단된다. 즉, 셀 형상비가 증가함에 따라 구조물의 거동 및 파괴모드는 점차적으로 전단에서 휨으로 변화하고, 이에 따라 구조물의 연성도 점차적으로 향상될 것으로 판단된다.

  • PDF

Study on the Performance of New Shear Resistance Connecting Structure of Precast Member (프리캐스트 부재의 새로운 전단저항 연결체의 성능에 관한 연구)

  • Kim, Tae-Hoon;Jin, Byeong-Moo;Kim, Young-Jin;Kim, Seong-Woon
    • Journal of The Korean Society of Civil Engineers
    • /
    • v.28 no.1A
    • /
    • pp.147-154
    • /
    • 2008
  • The purpose of this study is to critically evaluate the structural performance of an innovative new shear resistance connecting structure of precast member. Joints such as shear resistance connecting structure require special attention when designing and constructing precast segmental structures. An experimental and analytical study was conducted to quantify performance measures and examine one aspect of detailing for developed shear resistance connecting structure. A computer program, named RCAHEST (Reinforced Concrete Analysis in Higher Evaluation System Technology), for the analysis of reinforced concrete structures was used. A joint element is used to predict the inelastic behavior of the joints between segmental members. Future work by the authors will do a model test of precast segmental prestressed concrete bridge columns with this shear resistance connecting structure, and examined both the structural behavior and seismic performance.

  • PDF

A Study on the Moment and Shear Resisting Performance of Steel Girder - R/C Column Connection (철골 보 - 철근콘크리트 기둥 접합부의 휨 및 전단 저항성능에 관한 연구)

  • Choi, Kwang Ho
    • Journal of Korean Society of Steel Construction
    • /
    • v.12 no.4
    • /
    • pp.429-436
    • /
    • 2000
  • The composite system, which is consisted of the steel girder and reinforced concrete column has some advantages in the structural efficiency and the construction productivity by complementing the shortcomings between the two materials. This research is aimed at the development of the composite beam-column connection system by which the steel beam can be connected to the R/C column with smooth stress transfer. And, to ensure safety of this system, the tests of moment and shear resisting performance have been carried out for actual size specimen. From the test, the connection system has been preyed to take good resistance and stress transfer between steel girder and reinforced concrete column.

  • PDF

Relationship between Electrical Resistivity and Hydraulic Resistance Capacity measured by Rotating Cylinder Test (회전식 수리저항성능 실험기를 이용한 지반의 수리저항특성과 전기비저항 특성의 상관관계)

  • Kim, Young Sang;Jeong, Shin Hyun
    • Journal of Korean Society of Coastal and Ocean Engineers
    • /
    • v.27 no.1
    • /
    • pp.1-8
    • /
    • 2015
  • Recently, constructions of coastal structure including wind turbine structure have increased at southwest shore of Korea. There is a big difference of tide which rage from 3.0 m to 8.0 m at south and wet shore of Korea, respectively. In such ocean circumstance, large scour may occur due to multi-directional tidal current and transverse stress of the wind. therefore scour surrounding wind turbine structure can make system unsafe due to unexpected system vibration. In this study, hydraulic resistance capacity, i.e., critical velocity and critical shear stress, was evaluated by RCT. Uni-directional and bi-directional hydraulic resistance capacities of the samples which were consolidated by different preconsolidation pressures were correlated with soil resistivities of same samples. According to the correlation, it is possible to estimate hydraulic resistance capacity from electrical resistivity of soil. Through the updating the correlation for various soil types, it is expected that the hydraulic resistance capacity of whole construction site will be simply determined from the electrical resistivity.

Hysteretic Behavior of Slab-Column Joint Using Bended Type Shear Reinforcement (절곡형 전단보강근을 사용한 슬래브-기둥 접합부의 이력 거동)

  • Lee, Hyun-Ho;Lee, Do-Bum;Lee, Li-Hyung
    • Journal of the Korea institute for structural maintenance and inspection
    • /
    • v.10 no.3
    • /
    • pp.211-218
    • /
    • 2006
  • From the development of residential flat plate system, continuously bended shear reinforcement is developed for the prevention of punching shear. To know the punching shear capacity of developed shear reinforcement in slab-column joint, structural test is performed. The testing parameters are shear reinforcement types, such as no reinforcement, bended shear reinforcement, and head stud reinforcement. To verify the lateral capacity, cyclic load is applied under the constant vertical load condition. The results of tests are compared to as global displacement, slab-column joint strength. From the test results, the resisting capacity of developed shear reinforcement system has a good performance in the story drift ratio.

Effects of Flow Direction and Consolidation Pressure on Hydraulic Resistance Capacity of Soils (흐름방향과 압밀응력이 지반의 수리저항특성에 미치는 영향)

  • Kim, Youngsang;Jeong, Shinhyun;Lee, Changho
    • Journal of the Korean Geoenvironmental Society
    • /
    • v.16 no.5
    • /
    • pp.55-66
    • /
    • 2015
  • Big tidal differences, which range from 3.0 m to 8.0 m, exist with regional locations at south and west shores of Korea. Under this ocean circumstance, since a large scour may occur due to multi-directional tidal current and transverse stress of the wind, the scour surrounding the wind turbine structure can make instability of the system due to unexpected system vibration. The hydraulic resistance capacity of soils consolidated under different pressures are evaluated by Erosion Function Apparatus (EFA) under unidirectional and bi-directional flows in this study. It was found that the flow direction change affects significantly on the sour rate and critical shear stress, regardless of soil types while the consolidation pressure affects mainly cohesive soil. Among geotechnical parameters, the undrained shear strength can be well-correlated with the hydraulic resistance capacity, regardless soil type while the shear wave velocity shows the proportional relationships with the hydraulic resistance capacities of fine grained soil and coarse grained soil, respectively.

The Structural Performance Evaluation of Steel Pipe Pile Cap with Perfobond Rib Shear Connector (유공강판 전단연결재로 보강된 강관말뚝머리의 구조 성능 평가)

  • Koo, Hyun-Bon;Kim, Young-Ho;Kang, Jae-Yoon
    • Journal of The Korean Society of Civil Engineers
    • /
    • v.28 no.6A
    • /
    • pp.843-851
    • /
    • 2008
  • The conventional pile cap reinforcement systems regulated in the design specifications have some restrictions in design and construction such as requirement of shear key, disposition of reinforcing bars and insurance of anchoring length of reinforcements. This study suggests a new type of steel pipe pile cap system with perforated flat bar shear connector as an alternative to the conventional pile cap system for the improvement in structural performance and simplification of construction. And, experimental results of push-out and bending behavior are scribed for the evaluation of structural performance of the new pile cap system and it was compared to the structural behavior of conventional pile cap system.

  • PDF

An Experimental Study on Flexural Strength of Deep Corrugated Steel Plate Composite Members by Steel Grade and Reinforcement Method (강종 및 보강방법에 따른 대골형 파형강판 합성부재의 휨성능에 관한 실험적 연구)

  • Kim, Yongjae;Oh, Hongseob
    • Journal of the Korea institute for structural maintenance and inspection
    • /
    • v.21 no.2
    • /
    • pp.1-12
    • /
    • 2017
  • In this study, It was purpose to provide preliminary data for extension of the applicability of deep corrugated steel plate composite members by steel grade and shear reinforcement method. From the result of flexural test on deep corrugated plates composite members using GR40 and SS590, positive moment capacity was increased about 28% by SS590 steel. But to change steel grade was proved to have insignificant effects for increasement of negative moment capacity. In the moment test result of same overlapping length, Increasement rate of positive and negative moment capacity was not significantly improved by increasing the number of bolt. It was estimated to be due to the characteristics of bolt connection such as distance between centers of bolts, edge distance of bolt. In the test result on the spacing of shear reinforcement, positive moment capacity was increased and deformation of negative moment was reduced as the distance decrease. In the test result on the shape of shear reinforcement, positive and negative moment resistance was increased about 2% ~ 7% by U shaped shear reinforcement. In conclusion It was estimated that moment capacity of deep corrugated steel plate composite members are depend on steel grade of deep corrugated steel plate, spacing of shear reinforcement and reinforcing bar.