• 토지주택연구
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• 제8권3호
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• pp.181-187
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• 2017

To proactively respond to internal and external changes such as the recent demographic change and rising demand for diversified housing types, this study investigated the framed-structure free plan public house model proposed by the LH to look at the seismic performance of framed-structure apartment according to damper system use through non-linear analysis. The effectiveness thereof was also examined in terms of performance and economy. As a result, the proposed damper system application method to framed-structure free plan public house model was found to meet the performance requirements of the present earthquake-resistant design (KBC2016) and effective to apply to designs. The max response displacement and max response acceleration were compared based on the nonlinear analysis. As a result, the building with damper system showed better earthquake resistance performance than earthquake-resistant structure thanks to the damper system, although the base shear of earthquake-resistant system was reduced by 20% in design. The damper system is expected to help reduce building damage while ensuring excellent earthquake resistance performance. In addition, the framework quantities of earthquake-resistant structure and structure with damping system were compared. As a result, columns were found to reduce concrete amount by about 3.9% and rebar, by about 7.3%. Walls showed about 12.6% reduction in concrete and about 10.7% in rebar. In terms of cost, framework construction cost including formwork and foundation expenses was expected to drop by about 5~6%.

• Coupled systems mechanics
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• 제4권1호
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• pp.19-36
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• 2015

Modelling and analysis of a brick masonry building involves uncertainties like modelling assumptions and properties of local material. Therefore, it is necessary to perform a calibration to evaluate the dynamic properties of the structure. The response of the finite element model is improved by predicting the parameter by performing linear dynamic analysis on experimental data by comparing the acceleration. Further, a nonlinear dynamic analysis was also performed comparing the roof acceleration and damage pattern of the structure obtained analytically with the test findings. The roof accelerations obtained analytically were in good agreement with experimental roof accelerations. The damage patterns observed analytically after every shock were almost similar to that of experimental observations. Damage pattern with amplification in roof acceleration exhibit the potentiality of earthquake resistant measures in brick masonry models.

• 한국전산구조공학회:학술대회논문집
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• 한국전산구조공학회 1991년도 봄 학술발표회 논문집
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• pp.72-78
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• 1991

An improved procedure for earthquake resistant design of multistory building structures is proposed in this study. The effect of gravity load on seismic response of structures is evaluated through nonlinear dynamic analyses of a single story example structure. The presence of gravity load tends to initiate plastic hinge formation in earlier stage of a strong earthquake. However, the effect of gravity load seems to disapper as ground motion is getting stronger. And one of shortcomings in current earthquake resistant codes is overestimation of gravity load effects when earthquake load is applied at the same time so that it may leads to less inelastic deformation or structural damage in upper stories, and inelastic deformation is increased in lower stories. Based on these observation, an improved procedure for earthquake resistant design is derived by reducing the factor for gravity load and inceasing that for seismic load. Structures designed by the proposed design procedure turned out to have increased safety and stability against strong earthquakes.

• 대한공간정보학회지
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• 제15권3호
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• pp.59-67
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• 2007

본 논문에서는 도시지역 내 건축물의 지진 안전도를 평가하기 위하여 건축 구조학적인 자료조사와 실험결과를 데이터베이스화하고 여기에 GIS를 연계하여 지진의 위험도를 체계적으로 관리하고 분석할 수 있는 지진재해관리용 정보체계구축의 가능성을 제시하였다. 내진성능 평가를 위하여 건축물 대장과 건축도면, 수치지형도 등을 활용하여 건물의 구조, 주요 구조부재 등 지진내진평가 항목별로 자료를 수집 정리한 후 현장조사를 통해 자료를 보완하였으며, 내진 성능평가를 실시하고 종합평가지수를 산정한 후 지진 위험도를 평가함으로서 지진재해를 효과적으로 대처하고 관리할 수 있는 GIS 기반 정보체계를 구축하였다. 향 후 건물별 지진 위험도를 평가하는 절차와 방법을 모듈화 할 경우 보다 신속하고 정확한 지진재해정보관리체계를 구축할 수 있을 것으로 판단된다.

• 한국제4기학회지
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• 제22권2호
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• pp.1-5
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• 2008

Some reverse fault lines pass through the alluvial fans and west hill slope of Bulguksa mountains including Mt. Toham in the directions of N-S and NW-SE. The study area is known as relatively unstable, because of active faults. Assuming the record of earthquake in the Samguksagi, the architects in the construction of the Bulguksa temple should have recognized the possibility of breakdown from the earthquakes and the need for an unique structure against at that time. Against earthquakes, Greavee technique, a stonework construction technique following woothe one and use of Chushouok (Dongtleouok or Chumchaouok) were applied for the construction of Bulguksa temple. By designing the foundation stone with hole, a structure is prevented from motiff Ction that pillarsakdcede from a foundation stone in spite of horizontal load of earthquake while woot construction isaktrong frame at earthquake. The Bulguksa-temple isausually evaluated to be a beautiful architecture from the appeaultces like the weight balltced structure with unique decoration. ampressive architectures are beautiful in balance and harmony coming from the important and specific rolls in its own way by each part of whole structure. This beauty comes from the science.

• Structural Engineering and Mechanics
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• 제1권1호
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• pp.31-46
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• 1993

The motivations of the application of shakedown analysis to the earthquake-resistant design of ductile moment-resisting steel structures are presented. The problems which must be solved with this application are also addressed. The illustrative results from a series of static and time history nonlinear analyses of one-bay three-story steel frame and the related discussions have shown that the incremental collapse may be the critical design criterion in case of earthquake loading. Based on the findings, it was concluded that the inelastic excursion mechanism for alternation load pattern, such as in earthquake, should be the sidesway mechanism of the whole structure for the efficient mobilization of the structural energy dissipating capacity and that the shakedown analysis technique can be used as a tool to ensure this mechanism.

• 한국지반공학회논문집
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• 제16권4호
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• pp.129-139
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• 2000

항만시설에서 발생하는 지진에 의한 피해의 대부분은 매립지반의 액상화에 기인하는 것으로 알려져 있다. 국내 대형항만의 안벽은 대부분 중력식 안벽으로 설계.시공되고 있으며, 이러한 중력식 안벽은 조성된 배후 지반의 액상화에 취약하여 지진 발생시 액상화로 인한 대규모의 파괴가 발생한 사례가 많이 보고된 바 있다. 최근 기존에 시공된 중력식 안벽구조물의 내진성능을 향상시키기 위해 다양한 공법이 제안되고 있지만, 그 효율성에 대한 연구는 미진한 실정이다. 이번 연구에서는 기존 안벽의 내진보강공법으로 쉽게 적용할 수 있는 내진안벽 형식에 대한 내진보강 성능을 평가하였다. 이 논문에서는 내진보강안벽의 내진보강 성능을 평가하기 이해 수치해석적 측면에서 케이슨식 안벽의 내진보강 성능을 평가하였으며, 동일한 단면에 대해 실시된 진동대시험 결과와 비교하였다.

• 기술사
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• 제28권2호
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• pp.13-20
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• 1995

This paper Is to help the structural engineers for a better understanding of "Earthquake" with regard to the nature o( earthquake and the effect of earthquake on building structures. This reveals that the damage Inflicted upon by earthquake varies with many factors such as : magnitude of earthquake, distance from epicenter, site conditions, building structural characteristics and etc.. It is emphasized that in order to resist very strong earthquake, the ductility demand in the building structure Is important, and the proper duc-tility enables the structure to demonstrate inelastic rotation capacity of the joints and thus the structure may absorb and dissipate the seismic energy. This also presents a comparison between the current Americal UBC Code and the Korean Code, and the author expresses some points of concern on each code. Since earthquake almost invariably strikes at times and places, it is suggested that the current Korean Build-ing Code should be revised to enforce more stringent regulation against possible strong earthquake in the Korean peninsula.

• 한국전산구조공학회논문집
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• 제27권3호
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• pp.163-172
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• 2014

일반교량 내진설계의 목적은 붕괴방지설계이고 도로교설계기준 내진설계편은 교량구조의 연성파괴메카니즘을 구성하는 설계방식을 제시하고 있다. 그러나 구조형식 또는 현장여건에 의해 연성파괴메카니즘을 구성하는 것이 비합리적인 경우 차선책으로 취성파괴메카니즘을 구성하여 붕괴방지설계를 수행할 수 있다. 연성파괴메카니즘을 구성하는 기존 설계방식과 함께 내진설계편은 연성도 내진설계를 부록으로 제시하고 있다. 연성도 내진설계는 철근콘크리트 교각으로 구성되는 교량에 적용하며 설계자가 하부구조의 소요응답수정계수를 결정하고 이로부터 심부구속철근을 설계하는 방식이다. 이 연구에서는 철근콘크리트 교각기둥과 강재받침으로 설계된 일반교량을 선정하여 기존 설계방식과 연성도 내진설계를 모두 적용한 결과로부터 차이점을 확인하고 설계자가 내진설계를 수행하는 과정에서 두 설계방식을 모두 고려하는 설계절차를 제안하였다.

• Earthquakes and Structures
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• 제9권5호
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• pp.1091-1114
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• 2015

The adequacy of a number of advanced earthquake Intensity Measures (IMs) to predict the structural damage of earthquake resistant 3D R/C buildings is investigated in the present paper. To achieve this purpose three symmetric in plan and three asymmetric 5-storey R/C buildings are analyzed by nonlinear time history analysis using 74 bidirectional earthquake records. The two horizontal accelerograms of each ground motion are applied along the structural axes of the buildings and the structural damage is expressed in terms of the maximum and average interstorey drift as well as the overall structural damage index. For each individual pair of accelerograms the values of the aforementioned seismic damage measures are determined. Then, they are correlated with several strong motion scalar IMs that take into account both earthquake and structural characteristics. The research identified certain IMs which exhibit strong correlation with the seismic damage measures of the studied buildings. However, the degree of correlation between IMs and the seismic damage depends on the damage measure adopted. Furthermore, it is confirmed that the widely used spectral acceleration at the fundamental period of the structure is a relatively good IM for medium rise R/C buildings that possess small structural eccentricity.