• Steel and Composite Structures
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• 제14권5호
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• pp.473-491
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• 2013

The primary objectives of this paper are to describe the buckling patterns and to determine the squash load of steel plate-concrete (SC) walls. The major variables in this study were the width-thickness (B/t) ratio and yield strength of surface steel plates. Six SC walls were tested, and the results include the maximum strength, buckling pattern of steel plates, strength of headed studs, and behavior of headed studs. Based on the test results, the effects of the B/t ratio on the compressive strength are also discussed. The paper also presents recommended effective length coefficients and discusses the effects of varying the yield strength of the steel plate, and the effects of headed studs on the performance of SC structures based on the test results and analysis.

• 한국결정학회지
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• 제11권1호
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• pp.46-51
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• 2000

The molecular structures of 2-SC₄H₃CH=NN(H)C/sub 6/H/sub 5/(C/sub 11/H/sub 10/N₂S) and (GaMe₂)₂(2-SC₄H₃CH=NNC/sub 6/H/sub 5/)₂(C/sub 26/H/sub 30/Ga₂N₄S₂) have been determined by X-ray diffraction. Crystallographic data for 2-SC₄H₃CH=NN(H)C/sub 6/H/sub 5/:orthorhombic space group P2₁2₁2₁, a=6.108(1)Å, b=7.593(1)Å, c=22.356(2)Å, V=1037.1(3)ų, Z=4, R=0.0613. Crystallographic data for (GaMe₂)₂(2-SC₄H₃CH=NNC/sub 6/H/sub 5/)₂:monoclinic space group P2₁/n, a=15.996(2) Å, c=9.879(3)Å, β=100.07.(2)°, V=2764.599)ų, Z=4, R=0.0503.

• Steel and Composite Structures
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• 제34권2호
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• pp.189-213
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• 2020

Stainless-clad (SC) bimetallic steels that are manufactured by metallurgically bonding stainless steels as cladding metal and conventional mild steels as substrate metal, are kind of advanced steel plate products. Such advanced composite steels are gaining increasingly widespread usage in a range of engineering structures and have great potential to be used extensively for large civil and building infrastructures. Unfortunately, research work on the SC bimetallic steels from material level to structural design level for the applications in structural engineering field is very limited. Therefore, the aim of this paper is to investigate the material behaviour of the SC bimetallic steels under the cyclic loading which structural steels usually could encounter in seismic scenario. A number of SC bimetallic steel coupon specimens are tested under monotonic and cyclic loadings. The experimental monotonic and cyclic stress-strain curves of the SC bimetallic steels are obtained and analysed. The effects of the clad ratio that is defined as the ratio of the thickness of cladding layer to the total thickness of SC bimetallic steel plate on the monotonic and cyclic behaviour of the SC bimetallic steels are studied. Based on the experimental observations, a cyclic constitutive model with combined hardening criterion is recommended for numerical simulation of the cyclic behaviour of the SC bimetallic steels. The parameters of the constitutive model for the SC bimetallic steels with various clad ratios are calibrated. The research outcome presented in this paper may provide essential reference for further seismic analysis of structures fabricated from the SC bimetallic steels.

• 대한토목학회논문집
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• 제32권5A호
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• pp.277-287
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• 2012

지금까지 수행된 개구부가 존재하는 벽체에 대한 연구는 대부분 RC 벽체에 대해서 수행되었으며, SC(Steel plate Concrete) 벽체에 설치되는 개구부에 대한 연구는 수행된 예가 적다. 최근에 국내에서 개발된 SC 벽체는 원전구조물에 일부 적용되고 있지만, 관련 설계기준인 KEPIC-SNG에서도 개구부를 갖는 SC 벽체에 대한 설계법은 명확하게 정의되지 않았다. 본 연구에서는 원전구조물내 벽체에 설치되는 SC 벽체를 대상으로 개구부가 구조내력에 미치는 영향을 해석적 방법에 의해서 평가하였다. 비선형 해석 결과, 개구부가 설치되는 SC 벽체는 개구부 주변의 보강 여부가 내력에 미치는 영향이 크기 때문에 개구부 주변에 일정범위 이상의 보강이 이루어져야 하며, 개구부 주변이 보강된 경우는 개구부의 형상, 크기, 위치 및 설치개수에 관계없이 충분한 내력 및 연성을 확보할 수 있는 것으로 나타났다.

• Steel and Composite Structures
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• 제16권5호
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• pp.491-506
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• 2014

Buckling-restrained braces (BRBs) have excellent hysteretic behavior while buckling-restrained braced frames (BRBFs) are susceptible to residual lateral deformations. To address this drawback, a novel self-centering (SC) BRB with Basalt fiber reinforced polymer (BFRP) composite tendons is presented in this work. The configuration and mechanics of proposed BFRP-SC-BRBs are first discussed. Then an 1840-mm-long BFRP-SC-BRB specimen is fabricated and tested to verify its hysteric and self-centering performance. The tested specimen has an expected flag-shaped hysteresis character, showing a distinct self-centering tendency. During the test, the residual deformation of the specimen is only about 0.6 mm. The gap between anchorage plates and welding ends of bracing tubes performs as expected with the maximum opening value 6 mm when brace is in compression. The OpenSEES software is employed to conduct numerical analysis. Experiment results are used to validate the modeling methodology. Then the proposed numerical model is used to evaluate the influence of initial prestress, tendon diameter and core plate thickness on the performance of BFRP-SC-BRBs. Results show that both the increase of initial prestress and tendon diameters can obviously improve the self-centering effect of BFRP-SC-BRBs. With the increase of core plate thickness, the energy dissipation is improved while the residual deformation is generated when the core plate strength exceeds initial prestress force.

• Transactions on Electrical and Electronic Materials
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• 제15권3호
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• pp.149-154
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• 2014

A new CMOS analog design methodology using an independently optimized self-cascode (SC) is proposed. This idea is based on the concept of the dual-workfunction-gate MOSFETs, which are equivalent to SC structures. The channel length of the source-side MOSFET is optimized, to give higher transconductance ($g_m$) and output resistance ($r_{out}$). The highest $g_m$ and $r_{out}$ of the SC structures are obtained by independently optimizing the channel length ratio of the SC MOSFETs, which is a critical design parameter. An operational amplifier (OPAMP) with the proposed design methodology using a standard digital $0.18-{\mu}m$ CMOS technology was designed and fabricated, to provide better performance. Independently $g_m$ and $r_{out}$ optimized SC MOSFETs were used in the differential input and output stages, respectively. The measured DC gain of the fabricated OPAMP with the proposed design methodology was approximately 18 dB higher, than that of the conventional OPAMP.

• 한국건축시공학회지
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• 제14권1호
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• pp.1-10
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• 2014

The SC structure can have relatively liberal sectional surfaces, and allows modularization for pre-forming in factories and structural stability. It can be used for the shear walls in the core of general buildings or the structural members for parking buildings. In the future, it could be applied to moving large bus terminals, and widely used for general industrial structures as it can expedite the process compared to other methods. This study examined the applicability of SC structures to the retaining walls of a parking building and reviewed its economic value by comparing its construction term, quality control benefits, and cost compared to RC structures. It was found that SC structures are about 1.6-1.7 times more expensive than RC structures in terms of the cost of fabrication and installation. However, the construction term can be reduced by 27% to save indirect costs for constructors, as well as the cost of removing molds and material loss required when installing RC structures.

• 전기전자학회논문지
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• 제24권2호
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• pp.550-558
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• 2020

Polar code의 복호 기법 중에 하나인 연속 제거 (successive cancellation; SC) 복호는 순차적으로 복호를 수행해야하는 특성으로 인해 지연시간이 길고, 복호를 위해 필요한 하드웨어 면적이 크다. 이를 극복하기 위하여 다수의 연구들이 진행되었으며, 본 논문에서는 연속 제거 복호를 기반으로 한 복호 기법을 가지치기 (pruning) 복호 기법들과 다중-경로 (multi-path) 복호기법들로 나누어 정리하였다. 가지치기 복호기법에는 SSC (simplified SC), fast-SSC, 신드롬 판단 기반 복호 등이 있으며, 다중-경로 복호 기법에는 2-비트 연속 제거 복호와 redundant-LLR 표현 기반의 복호가 있다. 본 논문에서는 SSC, fast-SSC, 신드롬 판단, 2-비트 연속 제거, 그리고 redundant-LLR 표현 기반의 복호 기법들을 지연시간과 하드웨어 면적 측면에서 비교했으며, 비교 결과 신드롬 판단 기반 복호기법이 지연시간이 가장 짧고, redundant-LLR 표현 기반의 복호가 하드웨어 면적이 가장 작은 복호 기법이다.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 2008년도 추계 학술발표회 제20권2호
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• pp.65-68
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• 2008

구조실험에서 실험장치의 구성방법은 실험 결과에 결정적인 영향을 미치는 중요한 요소이다. 가력 장치와 치구를 어떻게 구성하느냐에 따라서 의도하는 실험조건이 구현될 수 있다. 특히, 실물구조물과 같은 대형 실험체를 이용하여 실험하는 경우에는 실험장치를 구성하는 경제적 비용을 감안하여 정확한 하중을 가력하기 위한 실험장치의 구성이 더욱 중요하다. 본 논문은 이와 같은 필요성에 의하여 구조실험시설에서 일반적으로 이용하고 있는 설비를 이용하여 경제적이고 효과적인 실험장치를 구성하여 대형 보형실험체의 실험을 수행하고 그 결과를 기술하기 위하여 작성되었다.

• 한국원자력학회:학술대회논문집
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• 한국원자력학회 2004년도 추계학술발표회 발표논문집
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• pp.1387-1388
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• 2004