• 한국주거학회:학술대회논문집
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• 한국주거학회 2009년도 추계학술발표대회 논문집
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• pp.132-137
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• 2009

The purpose of this study was to suggest urban regeneration methods for deteriorated downtown residential area, considering the development condition of urban blocks. Through the research that are based on literature, field survey, urban planning map and local experts consulting, it found out suitable sites for development such as a deteriorated residential zone or a unused site and it was deduced eight development types from analyzing the characters of developable sites. And then it is suggested various housing forms which were applied to eight development types of developable sites. The consequences of this research are summarized as follows. There are various housing forms by eight development types; block housing, low rise-high density court housing, medium low rise-high density housing, urban housing for low-income groups belong to T1-development of urban strategic position; block housing, housing on hilly site, semi-detached house, lodging house, urban housing for low-income groups, elderly housing belong to T2-development for living benefit; block housing, low rise-high density court housing, housing on hilly site, low rise housing, lodging housing, urban housing for low-income groups, elderly housing belong to T3-development of a small-scale rental housing; block housing, low rise-high density court housing, medium low rise-high density housing, terrace-house, housing on hilly site, low rise housing, block-typed detached house, semi-detached house, cluster-typed low rise housing, town house, urban housing for low-income groups belong to T4-residential environment renewal development; terrace-house, housing on hilly site, low rise housing, block housing, semi-detached house belong to T5-development of a small-scale housing; terrace-house, housing on hilly site, low rise housing, cluster-typed low rise housing belong to T6-development to adapt natural environment; block housing, low rise-high density court housing, low rise housing, block-typed detached house, town house belong to T7-development for community; block housing, low rise-high density court housing block housing, medium low rise-high density housing, terrace-house, housing on hilly site, low rise housing, elderly housing belong to T8-development of environment-friendly.

• Earthquakes and Structures
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• 제15권4호
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• pp.383-393
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• 2018

In this study, seismic performance of low and medium-rise RC buildings with wide-beam and ribbed-slab were evaluated numerically. Moment resisting systems consisting of moment and dual frame were selected as structural system of the buildings. Sufficiency of moment resisting wide-beam frames designed with high ductility requirements were evaluated. Upon necessity frames were stiffen with shear-walls. The buildings were designed in accordance with the Turkish Earthquake Code (TEC 2007) and were evaluated by using the strain-based nonlinear static method specified in TEC. Second order (P-delta) effects on the lateral load capacity of the buildings were also assessed in the study. The results indicated that the predicted seismic performances were achieved for the low-rise (4-story) building with the high ductility requirements. However, the moment resisting frame with high ductility was not adequate for the medium-rise building. Addition of sufficient amount of shear-walls to the system proved to be efficient way of providing the target performance of structure.

• 한국지진공학회:학술대회논문집
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• 한국지진공학회 2000년도 추계 학술발표회 논문집 Proceedings of EESK Conference-Fall 2000
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• pp.465-472
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• 2000

Seismic isolation technique has been applied mainly in low rise buildings and its seismic performance was satisfactory during Kobe Earthquake. However, in the case of medium and/or high-rise buildings, mid-story isolation could be more technically feasible than base isolation to reduce earthquake forces. In this paper, the seismic effectiveness of mid-story isolation in medium and/or high-rise shear building as well as low rise shear building was evaluated analytically. After verifying the effectiveness of mid-story isolation technique, this method also applied in residential-commercial building. It was found that mid-story isolation, that is isolation between upper residential area and lower commercial area, could reduce inter-story drift and floor shear forces comparing to the conventional fixed base.

• Wind and Structures
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• 제27권6호
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• pp.439-449
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• 2018

Wind loading of a tall building built amidst a group of buildings in urban environment is always greatly affected by shielding effects. Wind tunnel tests were carried out to assess the shielding provided by a row of low-rise or medium-rise buildings upstream a square-section tall building of height-to-breadth ratio 6. Mean and dynamic wind loads on the tall building were measured at different wind incidence angles and presented as interference factors (IFs). It is found that presence of a row of upstream buildings provides significant shielding to the tall building. At normal wind incidence, the mean along-wind loads and all components of fluctuating wind loads on the tall building are always reduced by shielding. Vortex shedding seems to still occur on the upper exposed part of the tall building but the vortex excitation levels are largely reduced. The degree of shielding is found to depend on a number of arrangement parameters of the row of upstream buildings. Empirical equations are proposed to quantify the shielding effect based on the wind tunnel data.

• 한국강구조학회 논문집
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• 제28권2호
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• pp.85-96
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• 2016

금상 하부 스플릿 티 접합부는 접합부를 구성하는 T-stub 플랜지의 두께, 고장력볼트의 게이지 거리, 고장력볼트의 개수 및 직경 등의 변화에 따라서 상이한 강도, 강성, 에너지소산능력 등을 발현한다. 이러한 상 하부 스플릿 티 접합부가 중 저층 강구조물에 적용될 경우에 전단력을 지탱하는 전단탭을 적용할 수 없는 상황이 발생한다. 이 때문에 충분한 휨모멘트지지능력뿐만 아니라 전단력도 지탱할 수 있는 개선된 상 하부 스플릿 티 접합부상세의 제안이 필요하다. 이 연구는 양재근 등이 해석적 연구와 실험적 연구를 수행하여 얻은 전단탭이 없는 상 하부 스플릿 티 접합부가 중 저층의 강구조물에 적용되었을 때 충분한 회전강성을 발현하는 가를 평가하기 위하여 진행하였다. 또한, 전단탭이 없는 상 하부 스플릿 티 접합부를 적용한 중 저층 강구조물이 안전한 구조적거동양상을 나타냄과 동시에 무차원화 된 초기 회전강성을 구조해석에 적용하여 재료적 물량저감 효과도 나타낼 수 있는 가를 평가하기 위하여 진행하였다.

• Earthquakes and Structures
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• 제11권5호
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• pp.741-777
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• 2016

A simplified approach of assessing torsionally balanced (TB) and torsionally unbalanced (TU) low-medium rise buildings of up to 30 m in height is presented in this paper for regions of low-to-moderate seismicity. The Generalised Force Method of Analysis for TB buildings which is illustrated in the early part of the paper involves calculation of the deflection profile of the building in a 2D analysis in order that a capacity diagram can be constructed to intercept with the acceleration-displacement response spectrum diagram representing seismic actions. This approach of calculation on the planar model of a building which involves applying lateral forces to the building (waiving away the need of a dynamic analysis and yet obtaining similar results) has been adapted for determining the deflection behaviour of a TU building in the later part of the paper. Another key original contribution to knowledge is taking into account the strong dependence of the torsional response behaviour of the building on the periodic properties of the applied excitations in relation to the natural periods of vibration of the building. Many of the trends presented are not reflected in provisions of major codes of practices for the seismic design of buildings. The deflection behaviour of the building in response to displacement controlled (DC) excitations is in stark contrast to behaviour in acceleration controlled (AC), or velocity controlled (VC), conditions, and is much easier to generalise. Although DC conditions are rare with buildings not exceeding 30 m in height displacement estimates based on such conditions can be taken as upper bound estimates in order that a conservative prediction of the displacement profile at the edge of a TU building can be obtained conveniently by the use of a constant amplification factor to scale results from planar analysis.

• Steel and Composite Structures
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• 제6권6호
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• pp.479-491
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• 2006

Structures in seismic regions are designed to dissipate seismic energy input through inelastic deformations. Structural or component failure occurs when the hysteretic energy demand for a structure or component subject to an earthquake ground motion (EQGM) exceeds its hysteretic energy dissipation capacity. This paper presents a study on identifying the hysteretic energy demand and distribution throughout the height of regular steel moment resisting frames (SMRFs) subject to severe EQGMs. For this purpose, non-linear dynamic time history (NDTH) analyses were carried out on regular low-, medium-, and high-rise steel SMRFs. An ensemble of ninety EQGMs recorded on different soil types was used in the study. The results show that the hysteretic energy demand decreases from the bottom stories to the upper stories and for high-rise structures, most of the hysteretic energy is dissipated by the bottom stories. The decrease is quite significant, especially, for medium- and high-rise structures.

• 한국구조물진단유지관리공학회 논문집
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• 제19권1호
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• pp.13-22
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• 2015

본 연구에서는 기존 강도증진형 내진보강법의 단점을 보완 개선할 수 있는 새로운 개념의 내진보강법인 RCSF (Reinforced Concrete Steel Frame) 외부접합형 내진보강공법을 제안하였다. RCSF 보강법은 거주자가 거주가 가능하면서 내진보강 공사를 실시할 수가 있으며, 접합부 시공성이 탁월하며, 특히 필요 내진보강량 산정이 간편한 전형적인 강도증진형으로 전단파괴가 지배적인 비내진상세를 가지는 국내 중 저층 철근콘크리트 건물에는 내력확보가 용이한 내진보강공법이다. 본 연구에서 제안한 RCSF 외부접합형 공법의 유용성을 검증 할 목적으로 기존 중 저층 철근콘크리트 학교건물의 골조를 대상으로 유사동적실험을 실시하여 검증함과 동시에 내진보강효과를 검토하였다. 그 결과, 국내에서 발생 가능한 최대 지진규모 (300gal)에서 비보강 골조는 붕괴를 하였지만, RCSF 외부접합형 내진보강법으로 보강한 골조는 경미한 지진피해가 예상되었으며, 대규모 지진 (400, 500gal)을 상정한 경우에도 소규모 이하의 지진피해가 예상되어 본 연구에서 개발한 RCSF 내진보강법의 유효성이 검증되었다고 사료된다.

• 콘크리트학회논문집
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• 제27권2호
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• pp.147-155
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• 2015

본 연구에서는 기존 강도증진형 내진보강법의 단점을 보완 개선할 수 있는 새로운 개념의 내진보강법인 SRCF (Steel Reinforced Concrete Frame) 외부접합형 내진보강법을 제안하였다. SRCF 보강법은 거주자가 거주가 가능하면서 내진보강 공사를 실시할 수가 있으며, 접합부 시공성이 탁월하며, 특히 필요 내진보강량 산정이 간편한 전형적인 강도증진형으로 전단파괴가 지배적인 비내진상세를 가지는 국내 중 저층 철근콘크리트 건물에는 내력확보가 용이한 내진보강공법이다. 본 연구에서 제안한 SRCF 외부접합형 공법의 유용성을 검증 할 목적으로 기존 중 저층 철근콘크리트 학교건물의 골조를 대상으로 유사동적실험을 실시하여 내진보강효과를 검토하였다. 그 결과, 국내에서 발생 가능한 최대 지진규모(300gal)에서 비보강 골조는 붕괴를 하였지만, SRCF 외부접합형 내진보강법으로 보강한 골조는 경미한 지진피해가 예상되었으며, 대규모 지진(400, 500gal)을 상정한 경우에도 소규모 이하의 지진피해가 예상되어 본 연구에서 개발한 SRCF 내진보강법의 유효성이 검증되었다고 사료된다.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 2008년도 추계 학술발표회 제20권2호
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• pp.241-244
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• 2008

본 연구의 필자는 우리나라 철근콘크리트(RC) 건물의 대다수를 차지하고 있는 중 저층 RC 건물, 특히 전단 및 휨파괴형 부재가 혼합된 중.저층 RC 건물의 성능지정이 가능한 내진성능평가법을 제안하였다$^{1)}$. 문헌[1]에서는 중 저층 RC 건물의 전단 및 휨파괴형 부재 내력과 연성능력 사이의 상관관계를 파악함과 동시에, 전단 및 휨파괴형 부재의 각각의 피해 정도가 건물 전체의 피해 상황에 어떻게 영향을 미치는가를 검토 및 검증하여 내진성능 평가법을 제안하였으며, 또한 실제 지진에서 피해를 입은 중 저층 RC 건물에 적용하여 제안한 평가법의 신뢰성을 검증하였다. 문헌[1]에서 제안한 평가법은 기존의 내력 중심의 내진성능 평가법(일본 내진진단법)에 비하여 보다 효율적으로 내진성능이 우수한 건물을 선별 가능하다고 사료되며, 이에 제안한 평가법을 토대로 본 연구에서는 국내 현존 저층 RC 건물을 대상으로 그 내진안정성을 평가 및 검토하였다.