• Title/Summary/Keyword: RC 기둥

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Slab Effect on Inelastic Behaviors of High Strength RC Beam-Column Joints (고강도 RC 보-기둥 접합부의 비탄성 거동에 대한 슬래브의 영향)

  • 장극관;김윤일;오영훈
    • Magazine of the Korea Concrete Institute
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    • v.9 no.2
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    • pp.167-177
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    • 1997
  • In thtx design of ductile moment -1csist1ng frnmcls (DMRFs) f'ollow~ng the. stlong columnweakbeam design philosophy, it is desirable that the joint and column remain essentiallyelastic in order to insure proper energy dissipation and lateral stability of the structure.Thv joint has been identifid as the "weak link: in DMRFs because any stiffness orstrength deterioration in this region can lead to substantial drifts and the possibility ofcollapse due to t'-delta effects. h3oreove1.. the tngintw is faced with the difficult task ofdetailing an element whose size is determined by theframing members, but \vhich mustresist a set of loads very different from those used in the design of the beams and columns.Four 3 -scale beam-column-slab joint assemblies were designed according to existing cod\ulcornerrequirements of' ACI 318-89. representing perimeter joints of DMRFs with reinforced highstrength concrete. The influence on aseismic behavior of beam-column joints due tomonolithic slab, has been investigated.lab, has been investigated.

Seismic Performance of Precast Concrete Beam-Column Connections Using Ductile Rod (연성 강봉을 사용한 프리캐스트 콘크리트 보-기둥 접합부의 내진성능)

  • Lee, Sang-Jin;Hong, Sung-Gul;Lim, Woo-Young
    • Journal of the Korea Concrete Institute
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    • v.26 no.6
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    • pp.695-705
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    • 2014
  • Precast concrete (PC) beam-column connections using ductile rods are proposed for earthquake zone. An existing beam-column connection, two PC specimens designed by considering failure modes and a conventional RC specimen were tested under cyclic loading to evaluate the seismic performance. The specimens were designed to satisfy the requirements of current design code. The variables are the yield strength of longitudinal reinforcing bars of PC beams. The test results showed that the proposed system applying smaller yield strength of the longitudinal reinforcing bars at the PC beams than the ductile rods was satisfied with seismic criteria. The deformation capacity and energy dissipation capacity of the proposed PC beam-column connections were greater than those of the existing DDC system.

Initial shear strength of RC hollow sectional columns (RC 중공단면 기둥의 초기전단강도 특성)

  • Sun, Chang-Ho;Kim, Ick-Hyun
    • Proceedings of the Korea Concrete Institute Conference
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    • 2009.05a
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    • pp.449-450
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    • 2009
  • In this study, the characteristics of initial shear strength of hollow sectional columns were investigated by experiments with parameters of the aspect ratios, void ratios, web area ratios and load patterns. The test results were analyzed with comparison of the values expected by the empirical equations. The empirical equation was newly proposed on the basis of mechanical characteristics and test results, and its validity was evaluated.

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Evaluation of structural behavior of RC columns strengthened with high-strength steel bars (고강도 횡보강철근을 사용한 철근 콘크리트 기둥의 구조 거동 평가)

  • Lee, Jang-Hee;Kim, Do-Jin;Baek, Seung-Cheol;Kim, Sang-Woo;Kim, Kil-Hee;Lee, Jung-Yoon
    • Proceedings of the Korea Concrete Institute Conference
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    • 2010.05a
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    • pp.103-104
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    • 2010
  • There are two conflicting opinions about effect of confinement using High-Strength transverse reinforcement. This paper verifies evaluation of structural behavior of RC columns strengthened with high-strength steel bars by performing an experimental study of 15 large-scale column confined by high-strength transverse reinforcement tests.

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A Study on the Dynamic Response of RC "L" Joint Under the Simulated Seismic Load (모의 지진하중을 받는 RC "L" joint의 동적거동에 관한 연구)

  • 박승범;청궁리
    • Magazine of the Korean Society of Agricultural Engineers
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    • v.24 no.3
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    • pp.100-107
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    • 1982
  • 최근 철근 콘크리트 구조물의 지진하중 및 이와 유사한 진동하중에 대한 내진안전성 문제가 대두되어 이에 관한 모형공식체의 진동실험 및 실존구조물의 동적구조특성의 해석 등에 의한 내진성 향상을 위한 보강방법이 강구되고 있다. 본 연구에서는 진동하중에 파괴되기 쉬룬 철근 콘크리트 보와 기둥이 상호 교차되는 죠인트 구역의 동적파괴거동을 확인하기 위하여 "L"형 철근 콘크리트 죠인트와 부재를 제작, 모의지진하중 조건하에서의 동적 응답특성을 구명하고자 반복하중에 따른 joint구역과 보 및 기둥의 동적파괴거동을 고찰하였다. 특히 내진구조물 설계에 주요 요소인 연성(m)이 0.5, 1.0, 3.0일 때 각각 3회씩 그리고 m=5.0일 때 부재가 완전히 파괴될 때까지 4회 반복하여 반복하중을 작용시키면서 이때의 부재의 극한강도 및 그 변형성능을 LVDT System을 사용하여 조사분석하였으며, 파괴성상은 물론 배근효과에 대하여도 이를 구명하고자 노력하였다. 본 연구 결과 무엇보다도 부재의 강성과 내력의 향상 및 신축만곡, 전단변형 등의 변형성능의 개선 그리고 보의 휨파괴에 대한 보강 및 joint구역의 전단보강은 내진구조물 설계를 위하여 중요 사항임을 확인하였다.

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Dynamic Analysis of RC Piloti-Type Building Subjected to Earthquake Loads (지진하중이 작용하는 RC 필로티 건축물의 동적해석)

  • Kim, Ju-Won
    • Journal of the Computational Structural Engineering Institute of Korea
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    • v.34 no.3
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    • pp.121-128
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    • 2021
  • Piloti-type buildings in Korea are usually composed of lower frames and upper shear wall structures. Piloti-type buildings have been seriously damaged during earthquakes because of the construction of soft and weak stories. Piloti-type buildings with edge cores are two-way unsymmetric planes. This paper analyzed and obtained the dynamic response for structures modeled using a multistory two-way asymmetric system. The numerical results, obtained using the Newmark-β method, show the time-history responses and trends of maximum displacements and shear forces. The purpose of this study is to evaluate the effect of reinforcement on dynamic response when a shear wall or brace is reinforced in the corner opposite the piloti.