• Korean Architects
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• 통권477호
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• pp.79-84
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• 2009

오늘날 전 세계적으로 급격한 에너지 사용과 이에 따른 온실가스의 증가로 기후변화 현상이 세계 곳곳에서 나타나고 있다. 이러한 지구온난화는 산업화에 따른 에너지소비가 주요한 원인으로 꼽히고 있으며, 선진국에서는 에너지소비와 이산화탄소 방출을 줄이기 위한 노력을 적극적으로 추진하고 있다. 우리나라에서도 2013년부터는 온실가스 감축 의무 이행국에 포함될 것으로 예상되어 지속가능(sustainable)한 국가발전을 위한 노력을 기울이고 있으며, 저탄소 녹색성장을 화두로 적극 대처하고 있다. 우리나라는 세계10대 에너지 소비국이면서 97%의 에너지를 외국에 의존하고 있다. 더욱이 이산화탄소배출량은 세계9위를 차지하고 있다. 따라서 향후 선진국과 경쟁을 하기위해서는 산업구조를 시급히 개선하여 에너지 소비를 줄이고 이산화탄소 배출을 적극적으로 억제하여야 한다. 현재 국내에서 사용되는 전체 에너지 가운데 건물에서 소비되는 에너지는 약 40%정도를 차지하고 있다. 이에 따라 건물에서의 에너지 사용량을 줄이고 환경부하를 저감할 수 있는 친환경 건축물의 구축이 시급하며, 관련 기술 개발 및 실제 건축물에 적용을 위한 노력이 진행되고 있다. 친환경 건축 관련 기술은 오늘날 많은 신축 건물에 적용되고 있으나, 그 성능은 아직까지 미흡한 부분이 많다. 건축물의 설계단체에 환경성능 분석결과가 적절히 반영된다면 적은 노력과 비용으로 매우 우수한 친환경 건축물을 구축할 수 있다. 하지만 기존의 설계절차 및 성능분석 지원 시스템으로는 건축 설계단계에서 에너지 소비량을 포함한 친환경 성능을 분석하기에 많은 시간의 투입과 전문가의 도움이 필요하다. 다행히 최근에 이러한 건축물의 친환경 성능 분석에 건축정보모델링(Building Information Modeling, BIM)기술을 활용할 수 있는 연구가 진행되고 있다. 건축정보모델링은 컴퓨터를 이용하여 건축물의 설계 데이터뿐 만 아니라 관련 모든 정보를 모델링 하여 건축물의 설계단계부터 건물의 폐기단계까지 활용되는 기술이다. 이미 선진 외국에서는 활발한 연구가 진행되어 실용적용 단계에 있으며, 국내에서도 초기 연구가 진행 중이다. 이러한 건축정보모델링 기술이 친환경 건축물 구축기술에 활용된다면, 친환경 건축물 구축 및 성능 향상에 많은 도움이 될 수 있을 것으로 기대된다. 또한, 녹색 성장의 기반이 될 수 있는 건축물의 설계 및 시공, 유지관리가 가능해 질것이다. 따라서 이번 연재에서는 지속가능한 설계와 건축정보모델링을 활용한 건축 환경 성능을 분석에 관한 내용을 주제별로 다루고 그 사례를 살펴보고자 한다.

• Korean Journal of Construction Engineering and Management
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• 제22권1호
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• pp.72-80
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• 2021

Based on the previous year's statistics, 37% of buildings in South Korea are aged over 30 years. As the number of the aging buildings increases, so does the need for maintenance. Building maintenance involves a significant number of works; the work of 'maintenance manager' accounting for the largest part. Currently, the maintenance history record is mostly in drawing or handwritten form which makes reviewing the data highly time consuming. Therefore, to improve the convenience of maintenance works and optimize historical data management, the existing maintenance process was analyzed. Problems were derived and a smart device-based automation model was established. In order to establish a smart device-based automation model, ① general flow of facility management process was analyzed and related articles were reviewed, ② current maintenance process was optimized, ③ functional block diagram of BIM Data, COBie Data, IoT, and AR-based automated maintenance management model was created, ④ a smart device-based automated maintenance management model was constructed, ⑤ finally, the above system was verified by testing the aforementioned model in the field site, evaluating the time required for the maintenance process and reviewing maintenance history data against the current one.

• Journal of the Korea institute for structural maintenance and inspection
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• 제23권1호
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• pp.78-84
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• 2019

The Marine concrete that located at immersion zone receives an hydrostatic pressure of 1 atm as depth of the water increased by 10 m. And it could accelerate chloride ion penetration. In this study, to evaluate the influence of hydrostatic pressure on chloride ion penetration, concrete mixed by ordinary Portland cement and Portland blast-furnace slag cement was exposed to 1 and 6 atm and substitute ocean water. As a result, the surface chloride ion concentration of the concrete under 6 atm of hydrostatic pressure increased rapidly and the water-soluble chloride ion contents was increased by depth. In addition, the concrete under 6 atm of hydrostatic pressure showed the increase of capillary pores corresponding to 5~100 nm.

• Journal of the Korea institute for structural maintenance and inspection
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• 제26권5호
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• pp.151-160
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• 2022

Owing to the recent increase in the frequency of explosion accidents, blast resistive design has garnered attention to reduce the damage of important structural elements. However, domestic research on the blast resistive structures is still insufficient, and domestic design guideline against blast loads are not documented yet. In this study, a numerical study on the RC blast resistive walls, where the test variable was the presence of FRP sheet, was performed using LS-DYNA program. Based on the numerical results, displacement-time hysteretic curve, pressure-impulse diagram, and fragility curve of the test specimens were derived. It was shown that the FRP sheet strengthening method is efficient to improve the blast resistive performance of the RC wall. Also, the strengthening effect of FRP sheet on the RC wall was stronger when the magnitude of the blast load was greater.

• Proceedings of the Korea Information Processing Society Conference
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• 한국정보처리학회 2015년도 춘계학술발표대회
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• pp.522-525
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• 2015

"녹색건축 인증제도"는 건축물의 자재생산단계, 설계, 건설, 유지 관리, 폐기에 걸쳐 건축물의 전 과정에서 발생할 수 있는 에너지와 자원의 사용 및 오염물질 배출과 같은 환경 부담을 줄이고, 쾌적한 환경을 조성하기 위한 목적으로 건축물의 친환경성을 평가하여 인증하는 제도이다. 우리나라는 2002년부터 제도를 운영해오고 있지만 LCA를 기반으로 한 평가기준이 미비하고, 인증대상 확대에 따른 수요를 대처하기 어려운 구조이다. 따라서 본 논문에서는 G-SEED와 국외 인증제도의 비교분석을 통해 문제점을 도출하고, 이를 해결하기 위한 IoT 환경에서의 G-SEED : EB 시스템 설계를 목적으로 하였다.

• Journal of the Korea institute for structural maintenance and inspection
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• 제11권4호
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• pp.51-61
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• 2007

A series of three shear wall specimens were tested under constant axial stress and reversed cyclic lateral loading to evaluate the capacity of seismic retrofit proposed for the shear wall with the opening induced by remodeling. One specimen was tested in the as-built condition and the others were retrofitted prior to testing. The retrofit involved the use of carbon fiber sheets and steel plates (thickness ; 3mm) over the entire face of the wall. Specimens were 1/2-scale representations of a one-story wall in a Korean apartment building that was built in 1980. The test results showed that failure mechanism of specimens governed by shear fracture and the strength of specimens was varied with according to the retrofitting strategies.

• Journal of the Korea institute for structural maintenance and inspection
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• 제11권3호
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• pp.77-86
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• 2007

The more demands on efficient utilization of resources, the more structural engineers prefer to select remodeling to improve old building's capacity. A series of four shear wall specimens were tested under constant axial stress and reversed cyclic lateral loading in order to evaluate the effect of the opening on the lower center of the wall induce by remodeling. Consequently, the existence of opening was verified to induce a different failure, which was caused by reduction of compression strut area formed on the wall to diagonal direction. Especially, the ultimate strength of the wall with an opening was revealed approximately 35% lower than that of the wall without an opening. And the similar results were appeared in characteristics of stiffness and energy dissipation capacity.

• Proceedings of the Korean Institute of Building Construction Conference
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• 한국건축시공학회 2013년도 추계 학술논문 발표대회
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• pp.120-121
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• 2013

Apartment houses maintenance like remodeling in at issue and the importance is getting higher. On this study, we analyzed a variety of the influence factor affected building's maintenance expenses. circumstance influence factor about maintenance expenses is classified into region(big city, small and medium city), (area of high snowfall), (downpour region), (earthquake region), location(waterfront, inland province), using condition(mixed use, single use), frequency of use(kindergarten, middle school, high school), architecture method(reconstruction, construction).

• Journal of the Korea Institute of Building Construction
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• 제23권5호
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• pp.595-605
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• 2023

With the escalating prevalence of modular construction projects, there is a concurrent surge in scholarly and industrial intrigue in this domain, leading to a broadened spectrum of its applications. Modular construction, inherently facilitated by controlled factory settings, boasts the capability to consistently deliver edifices of superior quality. To optimize this advantage, the judicious integration of quality assurance methodologies during the site-specific phases of lifting and assembly is non-negotiable. This research embarked on a survey directed at project stakeholders, aiming to gauge the perceived significance and efficaciousness of prevailing quality preservation and oversight protocols during the aforementioned site stages, subsequently employing the Importance-Performance Analysis(IPA) for data interpretation. The findings elucidated that, while a majority of quality assurance procedures were adeptly executed, perceptual disparities existed among stakeholders regarding certain aspects, prompting recommendations for enhancement. This investigative endeavor lays a foundation, aiding future studies in amplifying the quality assurance cognizance among professionals during modular construction's site-assembly phase.

• Journal of the Korea institute for structural maintenance and inspection
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• 제27권1호
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• pp.30-36
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• 2023

In this study, an image segmentation model that can evaluate surface porosity based on concrete surface images was derived. Three types of concrete specimens with different water-cement ratios (w/c = 54, 35, and 30%) were prepared, and 2,729 surface images were obtained using an optical microscope. Benchmarking tests, parameter optimization, and final model derivation were performed using the surface images, and an image segmentation model with 97% verification accuracy was obtained. The model was verified by comparing the porosity obtained from the model and X-Ray Microscope (XRM). The model provided similar porosity to that of XRM for the specimens with a high water-cement ratio, but tended to give lower porosity for specimens with a low water-cement ratio.