• Title/Summary/Keyword: 구조 벽체

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A Study on the Structure Behavior of Dry-assembled Wall with Concrete Blocks subjected to Cyclic Lateral Load (콘크리트블록으로 건식조립된 벽체의 수평반복하중에 대한 구조거동 연구)

  • Lee, Joong-Won
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.21 no.6
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    • pp.440-447
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    • 2020
  • Masonry structures are used as bearing walls in small buildings, but they are generally considered non-bearing walls. They are used as partition walls that divide the interior spaces of the frame structures of buildings. In addition, wetting techniques that use mortar as an adhesive between blocks or bricks in construction are vulnerable to climatic conditions, especially cracks in mortar, which can cause conduction collapse of the walls in seismic loading. The purpose of this research was to propose a dry concrete block construction method that complements the weak axial shear stiffness and improves the weakness of the wet construction method as well as to investigate its structural behavior. In this study, the material properties of concrete blocks were examined, and the seismic performance of the proposed dry assembly structure was verified by structural behavior tests on horizontal cyclic loads. First, in these study results, concrete blocks can be applied to the dry block construction method instead of wet construction methods because they secure more than C-type blocks in KS regulations. Second, the structural performance of the wall against a horizontal cyclic load indicates that the resisting force of the assembly block wall is increased by increasing the horizontal length of the wall, forming several diagonal cracks. Finally, the proposed dry block wall structure requires a seismic performance assessment considering that the ratio of the shape of the wall by height and length is considered a major influence variable on the structural behavior under a horizontal load.

An Experimental Study on the Shear Behaviour of Face Brick Wall Tied with the Screw Connector (나선형 긴결철물을 이용한 조적치장벽체의 전단거동에 관한 실험연구)

  • Kwon, Ki Hyuk
    • Journal of the Korea institute for structural maintenance and inspection
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    • v.11 no.2
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    • pp.145-154
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    • 2007
  • As buildings are built higher and their service life made longer, face brick walls are also required to be constructed in an easy and systematic manner, and to ensure their satisfying structural performance, inspectingly, against lateral load. Therefore this study aims to investigate the structural performance of face brick walls constructed by a new method using screwed stainless steel connectors and provide fundamental experiment data for field application of this method. The results of this study indicated that the face brick wall tied with screw connectors had better shear capacity against rocking motion than that of the wall constructed with ordinary tie bars when their tie spacing was the same. Based on the good performance of the wall tied with the screw connector, it is also expected that the spiral anchors developed in this study can possibly applied to high-rise by adjusting the spacing of the anchors considering the difference of dimensions.

Deformation of flows due to Two Wall Structure (2열 벽체 잠제에 대한 흐름장 변형)

  • Kim, Hyo Seob;Youn, Suk Zun
    • Proceedings of the Korea Water Resources Association Conference
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    • 2004.05b
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    • pp.987-991
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    • 2004
  • 잠제 형식의 발달에 따른 구조물들의 성능 및 환경 개선에 대한 연구가 활발해지고 있는 시점에서 벽체 형태의 잠제에 대한 연구는 다양한 각도에서 실행되고 있다. 이러한 벽체 구조물의 배치거리에 따른 효과를 연구하는 것을 목적으로 1열과 2열 벽체 잠제에 대한 조류와 같은 일방향 흐름장의 변화를 수치모형을 이용하여 분석하였다.

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Confinement Range of Transverse Reinforcements for T-shaped Reinforced Concrete Walls (철근콘크리트 T형 벽체의 콘크리트 구속을 위한 횡철근의 배근범위)

  • 하상수;오영훈;최창식;이리형
    • Journal of the Korea Concrete Institute
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    • v.14 no.6
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    • pp.1001-1009
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    • 2002
  • The objective of this study is to determine the range of confinement (or the transverse reinforcement of the reinforced concrete structural walls with the T-shaped cross section subjected to cyclic lateral loads. The range of confinement for transverse reinforcement is related to the location of neutral axis and determined by the magnitude and distribution of compressive strain. The compressive strain depends on the ratio of wall cross sectional area to the floor-plan area, the aspect ratio, configuration, the axial load, and the reinforcement ratios. By affection of flange, the neutral axis appears different depending on positive and negative forces and because of this reason, when web and flange are subjected to compressive stress, the range of confinement for the transverse reinforcement of T-shaped walls would shows different result. Therefore this experimental research focused on the structural characteristics of T-shaped walls and suggested the neutral axis depth through comparing the results of this study with sectional analysis.

A Study on Flexural Behavior of Composite PHC pile with CT Structural Steel (PHC파일과 CT형강을 합성한 합성형 벽체파일의 휨거동에 대한 연구)

  • Mha, Ho-Seong;Won, Jeong-Hun;Cho, Hyo-Sang
    • Journal of Korean Society of Steel Construction
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    • v.24 no.2
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    • pp.233-243
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    • 2012
  • This study verifies the structural capacity of the composite PHC pile (Pretensioned spun high-strength concrete) consisting of a PHC pile and two CT structural steels. Four full-scale specimens are fabricated and the experimental tests were performed to investigate the flexural behaviors of the composite PHC piles. The composite PHC pile can enhance both the structural capacity and functional convenience, since the web of CT structural steel with holes in the web acts as a shear connector (referred to as the perfobond rib), which can connect concrete and steel. All specimens exhibited flexural failure and the ultimate strengths were larger than the anticipated design strength according to the design standard. Thus, the composite PHC pile can be applicable to wall structures with sufficient strength. In addition, it seems that the web of the CT structural steel with holes performs its role as shear connectors.

An Experimental Study on the Behavior of Steel Plate-Concrete Wall with Vertical Ribs (수직 보강된 SC 벽체의 거동에 대한 실험적 연구)

  • Lee, Seung Joon;Choi, Byong Jeong;Kim, Tae Kyoung
    • Journal of Korean Society of Steel Construction
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    • v.21 no.3
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    • pp.277-287
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    • 2009
  • The objective of this study was to experimentally investigate the structural behavior of steel plate concrete walls with vertical ribs (SSC walls), to compare the experimental results with the currently applied evaluation equations, and to obtain information that would be useful in the development of design equations for SSC walls. SSC test specimens that were subjected to in plane shear forces and bending moments were fabricated and tested. The experimental results show that the effect of vertical ribs on the structural behavior of SSC walls may be neglected, and that the confinement effect of concrete on the steel plates on both sides of the walls was negligible. The comparison of the experimental results with the evaluation equations showed that the structural behavior of SSC walls under shear control is close to that of the evaluation equations, but that the behavior of SSC walls under larger bending moments is not very close to that of the evaluation equations. The current evaluation equations for USC walls may be applied to the design of SSC walls because the structural walls of nuclear power plants are not subjected to large in plane bending moments.

Evaluation of Seismic Strengthening Approach at the Boundary Elements of RC Walls using Prestressed Wire Rope Units (프리스트레스트 와이어로프를 사용한 RC 벽체의 단부 경계요소 내진보강 평가)

  • Kwon, Hyuck-Jin;Yang, Keun-Hyeok;Byun, Hang-Yong
    • Journal of the Korea institute for structural maintenance and inspection
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    • v.22 no.1
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    • pp.56-63
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    • 2018
  • The present study examined the reversal cyclic flexural behavior of walls with jacket section approach for seismic strengthening through forming the boundary elements at both ends of the wall. The prestressed wire ropes were used for the lateral reinforcement to confine the boundary element of the wall. The main parameter investigated was the height of the jacket section for strengthening. The limit height of the strengthening jacket section was determined by comparing the moment distributions between the existing and strengthened walls. Test results showed that the examined jacket section approach was significantly effective in enhancing the flexural resistance of walls, indicating 46% higher stiffness at peak strength and 210% greater work damage indicator, compared with the flexural performance of the unstrengthened wall. The ductility of the strengthened walls was insignificantly affected by the height of the jacket section when the height is greater than twice the wall length. The flexural capacity of the strengthened walls was 22% higher than the predictions obtained using the equivalent stress block specified in ACI 318-14.

The Evaluation of Fire-Resistant Performance of the Non-bearing Steel Wall Using Fire Resistant Glass (내화유리를 적용한 강재 유리벽의 내화성능 평가)

  • Lee, Jae-Sung;Yim, Hyun-Chang;Yang, Seung-Cho
    • Journal of the Korea institute for structural maintenance and inspection
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    • v.22 no.5
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    • pp.72-81
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    • 2018
  • Fireproof structures using concrete, built-up panels and dry walls are usually used in walls inside fire compartments. However, demand for glass walls is emerging due to increase in interest in visibility and external appearance. In this study on steel fire resistance walls using insulation glass, fire resistance tests and performance evaluations were conducted on 60 minute fire resistance walls and exterior walls which could be applied to interior fire compartments and 90 minute fire resistance walls which could be applied to curtain walls. According to the tests, the specimens satisfied the required fire resistance performance. The finite element analysis was conducted after the tests to evaluate the fire resistance performance of the glass walls. The analysis results showed that the preliminary evaluation of fire resistance performance would be feasible.

A Study on the Crack Control of Retaining Wall of Mass Concrete Structure (지하옹벽 매스콘크리트 구조물의 균열제어에 관한 연구)

  • 장동일;채원규;조광현;김광일;손영현
    • Proceedings of the Korean Institute of Industrial Safety Conference
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    • 1997.11a
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    • pp.289-294
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    • 1997
  • 매스콘크리트 구조물에서는 이미 경화된 콘크리트가 새로이 타설된 콘크리트의 변형을 제한하여 시공직후에 부재의 길이방향에 수직한 균열이 발생하는 경우가 자주 보고 되고 있다. 이 균열은 먼저 타설된 바닥에 대하여 벽체의 변위가 제한될 때 구속인장응력에 의해 발생된다. 이러한 균열의 발생원인은 몇 가지로 살펴볼 수 있는데, 그 하나는 먼저 타설한 바닥 콘크리트와 새로 타설한 벽체 콘크리트와의 수화열 발생의 차이에 의한 것이며, 두번째 이유로 바닥과 벽체사이의 건조수축의 차이를 들 수 있다. (중략)

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Development of Plastic Panel for Under Ground Wall (시공이 편리한 지하실 마감재용 플라스틱 내벽체 개발)

  • Han, Doo-Hee
    • Proceedings of the KAIS Fall Conference
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    • 2010.05b
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    • pp.1086-1088
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    • 2010
  • 본 연구는 지하 구조물의 내벽에서 발생하는 습윤(濕潤) 및 결로를 방지하는 내벽체에 관한 것으로, 사방으로 연결조립 가능한 벽체판넬의 한쪽을 수직 지지프레임에 끼움 조립한 상태에서 타카핀으로 벽체판넬 및 수직 지지프레임을 동시 관통하여 내벽에 고정한 후 상기 수직프레임에 다른 벽체판넬의 일측을 중첩되게 조립하는 방법으로 지하 구조물에 내벽체를 편리하게 시공할 뿐만 아니라 공기를 단축하며, 상기 내벽체의 구성부품이 매우 간소하면서 가격이 저렴하여 공사비를 대폭 절감할 수 있는 시공이 편리한 지하 구조물용 내벽체의 개발에 관한 것이다.

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