• 한국산업보건학회지
• /
• 제22권4호
• /
• pp.329-336
• /
• 2012

Objectives: The aim of this study is to analyze main problems on occupational safety and hygiene in construction sites and to suggest some improvement methods. In order to decrease industrial accidents, I emphasize the approach paradigm shifts according to characteristics of construction workers. Methods: Pointing out the irrationality of current institutions by comparing bad outcomes of occupational safety and hygiene in construction industry and characteristics of construction workers. Results: In order to decrease industrial accidents, we need some approach paradigm shifts; the supply method of industrial safety and health fundamentals on the construction industry level, the accident rate calculation by using the actual construction workforce instead of an estimation, institutionalizing the prevention efforts themselves for industrial accidents, securing enough production costs for the precondition of occupational safety and hygiene in construction sites. Conclusions: I ascertain the need of the approach paradigm shifts for decreasing industrial accidents in the construction industry.

• 산업경영시스템학회지
• /
• 제33권4호
• /
• pp.10-22
• /
• 2010

The first full-scale u-City operation has started in Dongtan u-City. As local cities take over and operate the u-City, unexpected issues arise such as securing the budget of operating costs and self-providing the costs with business models utilizing the u-City assets. The paper presents a strategy for solving these issues. The strategy provides a foundation(infrastructure) for long-term operation models which may reduce the long-term operating costs. In order to establish the economic operating framework of u-City, suggested are some cost-reduction models based on the operating costs structure. For each model, a base framework with comparative analysis of operating costs is provided. With these models, each u-City may select a relevant model according to the characteristics of it. We hope that the framework provides the foundation for efficient and sustainable u-City operations.

• 한국안전학회지
• /
• 제22권5호
• /
• pp.33-40
• /
• 2007

Standard safety management costs can not be applied to each site with same rate, it is very difficult, because it depends on the experience, work method, work kind, work progress schedule, and hazard level of each construction company. Therefore, this study is to find out hazard level of each work kinds through questionnaire and interview and investigate analyze the status which standard safety management costs have been used. Also, this study is to show reasonable rates of standard safety management costs in construction industry and to set up countermeasures against those problem after reviewing its status in korea with in Japan and Europe. This study is to investigate eleven project kinds of domestic system, first, and to investigate eleven items of apartment bldg, office. Also this study is to investigate and analyze performed costs of presently processing worker finished work so that it shows a new reasonable rate against standard safety management costs in construction industry, in order to make basical data and material to be systemized.

• 대한안전경영과학회지
• /
• 제16권3호
• /
• pp.23-34
• /
• 2014

With a view to analyzing the influential factors and their prioritization in association with the loss from construction disasters, this study has presented relative weighted value and importance for each category of loss by making a systematic classification of costs for non-insured categories (indirect costs) and conducting AHP analysis based on results of a survey of specialists. Through the study, first, I have divided the larger classification of loss factors into human loss factor, financial loss factor, special cost factor, and managerial loss factor, and, second, have presented prioritization of loss categories by allotting scores based on weighted values after calculating weighted value through pairwise comparison of loss levels. Based on these results of the study, we should be able to qualitatively calculate the loss costs that construction disasters inflict on business, promote rational decision-making and efficiency in spending related to a disaster, and compare it against safety investment designed to reduce disaster loss from the perspective of business strategy.

• Structural Engineering and Mechanics
• /
• 제43권1호
• /
• pp.31-51
• /
• 2012

This paper presents a computational study that explores the design of rigid steel frames by considering construction related costs. More specifically, two different aspects are investigated in this study focusing on the effects of (a) reducing the number of labor intensive rigid connections within a frame of given geometric layout, and (b) reducing the number of different member section types used in the frame. A genetic algorithm based optimization framework searches design space for these objectives. Unlike some studies that express connection cost as a factor of the entire frame weight, here connections and their associated cost factors are explicitly represented at the member level to evaluate the cost of connections associated with each beam. In addition, because variety in member section types can drive up construction related costs, its effects are evaluated implicitly by generating curves that show the trade off between cost and different numbers of section types used within the frame. Our results show that designs in which all connections are considered to be rigid can be excessively conservative: rigid connections can often be eliminated without any appreciable increase in frame weight, resulting in a reduction in overall cost. Eliminating additional rigid connections leads to further reductions in cost, even as frame weight increases, up to a certain point. These complex relationships between overall cost, rigid connections, and member section types are presented for a representative five-story steel frame.

• 한국구조물진단유지관리공학회 논문집
• /
• 제17권4호
• /
• pp.101-111
• /
• 2013

본 연구에서는 울산~포항 간 복선전철 건설예정인 교량을 사례로 교량형식별 LCC 개념을 적용 경제성이 가장 우수한 공법을 적용하기 위하여 같은 연장 (L=1,615m)을 갖는 유사한 4개 교량에 대한 DEA (Data Envelopment Analysis) 분석을 실시하였다. DEA 모형은 상대적 효율성 평가를 위해 개발된 CCR 모형을 사용하였으며, 투입변수로 초기건설비용, 유지관리비용, 간접비용 (사용자비용 + 사회간접 손실비용), 생애주기비용을 사용, 산출변수로는 평균 내구연한을 사용하였다. 투입 변수 산정을 위해 생애주기비용 분석을 사용하였는데 생애주기 비용 산정은 분석기간 100년, 실질할인율 4.83%를 적용 하였으며, 비용의 분류는 초기건설비용, 유지관리비용, 사용자비용, 사회간접손실비용으로 분류 하였다. 분석결과, 비교 2안과 비교 3안이 가장 효율적인 것으로 분석되었으며, 나머지 대안의 효율성은 비교 1안, 기본안, 비교 4안 순서로 나타났다.

• 한국건축시공학회:학술대회논문집
• /
• 한국건축시공학회 2022년도 봄 학술논문 발표대회
• /
• pp.198-199
• /
• 2022

Reinforced concrete is the most widely used construction method for constructing structures. There is a lot of process for constructing Reinforced concrete structures such as installing rebars, molds and support, mixing and placing concrete, and curing. So the reinforced concrete work accounts for a large part of the total construction cost for constructing structure. For this reason a reasonable standard for estimating the cost of reinforced concrete construction has to be established and it will be possible to secure appropriate costs for construction work. In this study, we analyze the revision factors of the standard for estimating the cost of reinforced concrete construction and present them to secure reasonable construction costs.

• 한국건설관리학회논문집
• /
• 제21권1호
• /
• pp.32-39
• /
• 2020

본 연구의 목적은 임시활주로를 건설하는 과정에서 발생된 위험항목을 도출하고 위험항목을 조치하기 위해서 지출된 위험비용에 따른 손실비용을 분석하는 것이다. 이에 따라 건설공사가 완료된 임시활주로를 사례대상으로 선정하였으며, 시공자료(실정보고자료, 설계변경요청자료, 설계변경승인자료, 계약내역, 준공내역 등)를 기반으로 공사비의 변동을 유발한 위험항목과 위험항목을 조치하기 위해서 지출된 위험비용 그리고 손실비용을 분석하였다. 사례대상으로 선정된 임시활주로를 건설하는 기간 동안에 발생되었던 위험항목은 8개로 도출되었으며, 그 중에서 발주기관의 책임으로 인하여 발생된 위험항목은 3개, 건설회사의 책임으로 인하여 발생된 위험항목은 5개이다. 그리고 위험비용은 520백만원으로 발주기관이 부담하여야 하는 위험비용은 243백만원, 건설회사가 부담하여야 하는 위험비용은 277백만원으로 산정되었다. 이에 따라 발주기관은 건설회사와 체결된 계약금액 대비 2.36%의 예산이 추가적으로 지출되었고 건설회사는 최초 계획된 수익 443백만원 중 -277백만원이 손실되어 잔여수익은 165백만원으로 분석되었다.

• 한국건설관리학회:학술대회논문집
• /
• 한국건설관리학회 2008년도 정기학술발표대회 논문집
• /
• pp.409-414
• /
• 2008

본 연구의 목적은 BTL사업의 재무모델 민감도 분석을 통하여 우선 협상자 선정시 문제점을 분석하고 민간사업자가 사업 제안 시 효율적인 사업전략을 제시하는데 있다. 이를 위해 BTL사업 중 부속시설사업의 순이익을 고려하지 않는 학교 시설물을 대상으로 각 사업지구를 선정하여 사업비용 분석 후 재무모델의 민감도를 분석하였다. 이와 같은 목적과 방법에 따라 진행된 본 연구의 결론을 요약하면 다음과 같다. 첫째 재무모델 민감도 분석결과 요구수익률은 0.10 % 증가 시 평균 2.28점 감소를 보이며, 공사비와 운영비는 10억 증가 시 평균 10.73점, 6.22점씩 감소하는 것으로 분석되었다. 둘째 재무모델의 민감도 분석을 통한 BTL 사업의 문제점은 가격담합 및 저가투찰, 평가항목기준의 미비로 인해 공사비만으로 평가되는 정실평가가 이루어지고 있다. 상기에 문제점을 보완하기 위해 공사비보다 운영비의 점수 감소가 상대적으로 낮으므로 공사비증가 보단 운영비를 증가 시켜 제안하는 것이 사업성공에 효율적인 것을 제시하였다.

• 한국건축시공학회:학술대회논문집
• /
• 한국건축시공학회 2019년도 춘계 학술논문 발표대회
• /
• pp.226-227
• /
• 2019

The basic type construction cost which is the base of the building cost estimation is being adjusted according to the price changes by utilizing the apartment construction cost index in order to flexibly operate it. In this study, we analyzed the change trends and characteristics of the housing cost index for the basic type building cost model project operated from September, 2012 to March, 2018. As a result, the increase in material costs is slight while the share of the labor cost increased in the construction cost due to the rise of labor unit price, leading to a perceived increase in sensitivity of labor costs. We should be careful to keep the sensitivity of the material cost and the labor cost to an appropriate level so that the index may not be distorted.