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한국공간구조학회> 한국공간구조학회지> 전단 보강 간격과 지지부 조건을 고려한 유공형 강판으로 전단 보강된 콘크리트 넓은 보의 전단 강도 산정식

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전단 보강 간격과 지지부 조건을 고려한 유공형 강판으로 전단 보강된 콘크리트 넓은 보의 전단 강도 산정식

Shear Strength Equation of Concrete Wide Beam Shear Reinforced With Steel Plate Considering Transverse Spacing and Support Width

김민숙 ( Kim Min Sook ) , 정은호 ( Jeong Eun Ho ) , 노경민 ( Ro Kyong Min ) , 이영학 ( Lee Young Hak )
  • : 한국공간구조학회
  • : 한국공간구조학회지 19권4호
  • : 연속간행물
  • : 2019년 12월
  • : 61-68(8pages)
한국공간구조학회지

DOI


목차

1. 서론
2. 전단 강도 산정식
3. 실험 개요
4. 실험 결과
5. 넓은 보의 전단 강도 산정식 제안
6. 전단 강도 제안식 평가
7. 결론
감사의 글
References

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초록 보기

This paper discusses the influence of transverse reinforcement spacing and support width of concrete wide beam on shear performance. In order to evaluate the shear performance, a total of thirteen specimens were constructed and tested. The transverse reinforcement spacing, the number of legs and support width were considered as variables. From the test results, the shear strength equation of concrete wide beam is proposed for prediction of shear strength of concrete wide beam to consider the transverse reinforcement spacing and support width. It is shown that the proposed equation is able to predict shear strength reasonably well for concrete wide beam.

UCI(KEPA)

I410-ECN-0102-2021-500-000627577

간행물정보

  • : 공학분야  > 건축공학
  • : KCI등재
  • :
  • : 계간
  • : 1598-4095
  • : 2287-7401
  • : 학술지
  • : 연속간행물
  • : 2001-2021
  • : 837


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발행기관 : 한국공간구조학회 간행물 : 한국공간구조학회지 21권 2호 발행 연도 : 2021 페이지 : pp. 4-11 (8 pages)

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발행기관 : 한국공간구조학회 간행물 : 한국공간구조학회지 21권 2호 발행 연도 : 2021 페이지 : pp. 12-17 (6 pages)

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발행기관 : 한국공간구조학회 간행물 : 한국공간구조학회지 21권 2호 발행 연도 : 2021 페이지 : pp. 18-25 (8 pages)

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저자 : 오명호 ( Oh Myoung Ho ) , 박성진 ( Park Sung Jin ) , 김영호 ( Kim Young Ho )

발행기관 : 한국공간구조학회 간행물 : 한국공간구조학회지 21권 2호 발행 연도 : 2021 페이지 : pp. 33-40 (8 pages)

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For the practical application of U-flanged Truss Hybrid beams, the flexural capacity of hybrid beams with end reinforcement details using vertical steel plates was verified. The bending test of U-flanged Truss Hybrid beams was performed using the same top chord under the compressive force, but with the thickness of the bottom plate and the amount of tensile reinforcement. The initial stiffness and maximum load of the specimen with tensile reinforcement have a higher value than that of the specimen without tension reinforcement, but the more tensile reinforcement, the greater the load decrease after the maximum load. In the case of the specimen with tensile reinforcement, because the test result value is 76% to 88% when compared with the flexural strength according to Korea Design Code, the safety of the U-flanged Truss Hybrid beam with the same details of the specimens can't ensure. Therefore, the development of new details is required to ensure that the bottom steel plate and the tensile reinforcement can undergo sufficient tensile deformation.

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5스마트 TMD 제어를 위한 강화학습 알고리즘 성능 검토

저자 : 강주원 ( Kang Joo-won ) , 김현수 ( Kim Hyun-su )

발행기관 : 한국공간구조학회 간행물 : 한국공간구조학회지 21권 2호 발행 연도 : 2021 페이지 : pp. 41-48 (8 pages)

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A smart tuned mass damper (TMD) is widely studied for seismic response reduction of various structures. Control algorithm is the most important factor for control performance of a smart TMD. This study used a Deep Deterministic Policy Gradient (DDPG) among reinforcement learning techniques to develop a control algorithm for a smart TMD. A magnetorheological (MR) damper was used to make the smart TMD. A single mass model with the smart TMD was employed to make a reinforcement learning environment. Time history analysis simulations of the example structure subject to artificial seismic load were performed in the reinforcement learning process. Critic of policy network and actor of value network for DDPG agent were constructed. The action of DDPG agent was selected as the command voltage sent to the MR damper. Reward for the DDPG action was calculated by using displacement and velocity responses of the main mass. Groundhook control algorithm was used as a comparative control algorithm. After 10,000 episode training of the DDPG agent model with proper hyper-parameters, the semi-active control algorithm for control of seismic responses of the example structure with the smart TMD was developed. The simulation results presented that the developed DDPG model can provide effective control algorithms for smart TMD for reduction of seismic responses.

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발행기관 : 한국공간구조학회 간행물 : 한국공간구조학회지 21권 2호 발행 연도 : 2021 페이지 : pp. 49-56 (8 pages)

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The damage to non-structural elements in buildings has been increasing due to earthquakes. In Korea, post-installed anchors produced overseas have been mainly used for seismic anchorage of non-structural components to structures. Recently, a new cast-in-place concrete insert anchor installed in concrete without drilling has been developed in Korea. In this paper, an experimental study was conducted to evaluate the tensile and shear strengths of the newly developed anchor under monotonic load. The failure modes of the tension specimens were divided into concrete breakout failure and steel failure, and all shear specimens showed steel failure. In both tension and shear, the maximum loads of specimens were greater than the nominal strengths predicted by the concrete design code (KDS 14 20 54). As a result, it is expected that the current code can also be used to calculate the strength of the developed cast-in anchor.

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발행기관 : 한국공간구조학회 간행물 : 한국공간구조학회지 21권 2호 발행 연도 : 2021 페이지 : pp. 57-66 (10 pages)

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This study develops finite element models for seismically-deficient reinforced concrete building frame retrofitted using fiber-reinforced polymer jacketing system and validates the finite element models with full-scale dynamic test for as-built and retrofitted conditions. The bond-slip effects measured from a past experimental study were modeled using one-dimensional slide line model, and the bond-slip models were implemented to the finite element models. The finite element model can predict story displacement and inter-story drift ratio with slight simulation variation compared to the measured responses from the full-scale dynamic tests.

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발행기관 : 한국공간구조학회 간행물 : 한국공간구조학회지 21권 2호 발행 연도 : 2021 페이지 : pp. 67-79 (13 pages)

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This paper aims to develop numerical models for seismically-deficient reinforced concrete columns retrofitted using a fiber-reinforced polymer jacketing system under blast loading scenarios. To accomplish the research goal, a coupling model reproducing blast loads was developed and implemented to the column model. The column model was validated with a past experimental study, and the blast responses were compared to the numerical responses produced by past researchers. The validated modeling method was implemented to the non-retrofitted and retrofitted column models to estimate the effectiveness of the retrofit system. Based on the numerical responses, the retrofit system can significantly reduce the peak dynamic responses under a given blast loading scenario.

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In this paper, nonlinear finite element analysis was conducted based on the experimental results on buckling restrained brace. The reliability of the analytical model was verified by comparing the results of experimental studies with hysteresis loop, bi-linear curve, cumulative energy dissipation capacity, and equivalent viscous damping. A valid finite element model has been secured and will be used as basic data for finite element analysis of buckling restrained braces in the future.

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발행기관 : 한국공간구조학회 간행물 : 한국공간구조학회지 21권 2호 발행 연도 : 2021 페이지 : pp. 89-97 (9 pages)

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발행기관 : 한국공간구조학회 간행물 : 한국공간구조학회지 19권 4호 발행 연도 : 2019 페이지 : pp. 4-7 (4 pages)

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8전단 보강 간격과 지지부 조건을 고려한 유공형 강판으로 전단 보강된 콘크리트 넓은 보의 전단 강도 산정식

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10RC 벽식 아파트의 손상 제어를 위한 PC 비내력벽 시스템의 실험적 평가

저자 : 문교영 ( Moon Kyo Young ) , 김시윤 ( Kim Siyun ) , 김승직 ( Kim Sung Jig ) , 이기학 ( Lee Kihak )

발행기관 : 한국공간구조학회 간행물 : 한국공간구조학회지 19권 4호 발행 연도 : 2019 페이지 : pp. 77-84 (8 pages)

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This study introduces a newly developed PC non-bearing wall system to prevent the damage of RC wall-type apartments that have been heavily damaged by the 2017 Pohang Earthquake. In order to evaluate the performance of the developed PC non-bearing wall system, a static cyclic test is conducted. The prototype of test specimen is from the RC wall-type apartment which has been severely damaged by the 2017 Pohang Earthquake. The specimen with the conventional non-bearing wall system showed the similar damage of RC wall type apartment suffered from the Pohang Earthquake. In case of the specimen with the developed PC non-bearing wall system, cracks and damages were not transmitted between the walls due to the seismic slit and there were almost no cracks in the non-bearing walls. Therefore, the proposed non-bearing wall system, separated from the structural walls, could prevent spreading cracks to bearing walls and make it possible to effectively control damage due to earthquake loads.

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