• 기술사
• /
• 제30권6호
• /
• pp.68-76
• /
• 1997

대규모적이며 복잡한 공공시설사업의 이행은 재정, 계획, 설계 기타 거대한 상호 연계 Pro-ject의 건설을 통합하기 위한 정선된 절차와 규정이 필요하다고 하겠다. 요즈음 우리 나라의 건설산업기본법에 "건설사업관리(CM)"라는 새로운 건설계약 업종이 대두되면서 실질적인 건설산업현장에서 관리기법의 정의와 다양성을 살펴 볼 필요성이 요구되는 차제에 세계 제7차 "Civil and Building공학의 컴퓨터화"란 주제로 1997년 8월 19~22일 Sheraton Walker Hill 호텔에서 열렀다. 이 대회에서 상기 인천국제공항 건설에 참여한 Parsons Overseas Company의 PE인 Steven B Cornell이 발표한 인천국제공항건설의 Program Management 운영을 간추려 소개한다. 이 Program Management 설명에서 Pro-gram Management(PmMt), Project Mana gement(PM), Construction Management(CM) 등의 정의과 차별성의 파악 및 p. M. 0(Program Management Oversight)의 기능과 역할을 파악할 수 있을 것이라고 판단된다. 파악할 수 있을 것이라고 판단된다.

• 한국지반공학회논문집
• /
• 제17권3호
• /
• pp.69-75
• /
• 2001

본 논문에서는 지하공동 위에 설치된 띠 기초의 지지력에 대하여 upper bound theory를 이용하여 연구하였다. 기초 크기, 공동의 크기 및 위치, 그리고 지반의 물성치의 영향에 관하여 고찰하였으며 10개의 파괴 형상에 대하여 분석을 수행하였다. 각각의 파괴형상은 지반의 물성치 및 기하학적인 형상에 관한 함수로 표현되어 컴퓨터 해석을 통한 최소화를 시행하였다. 최소화를 위한 프로그램은 Boland C++ Builder를 이용하여 작성한 후 PC에서 수행되었다. 10개의 파괴형상 중 최소의 기초 지지력을 작성된 컴퓨터 프로그램을 통하여 구하였고 이를 해당 기초의 극한 지지력으로 추정되었다. 본 연구의 결과를 종합 정리하여 지하공동 위에 위치한 띠 기조의 극한 지지력을 구할 수 있는 간단한 식을 제시하였다.

• 한국철도학회:학술대회논문집
• /
• 한국철도학회 2007년도 춘계학술대회 논문집
• /
• pp.461-467
• /
• 2007

Exact application of the tensile force is critical to high-tension members in civil engineering structures, and thus actual tensile forces have often been estimated in field. To date, a few methodologies have been presented utilizing static and/or dynamic responses of tension members. Each of these methods has its disadvantages as well as advantages in its procedures, accuracy, and equipment requirements. In this paper, the feasibility of a sensitivity based methodology, based on the relationship between the natural frequencies and the applied tensile force, developed by the authors, is verified using the measured data from a cable-stayed bridge structure. From the results, it is shown that the proposed method can be utilized in estimating the tensile force in tension member of a real structure.

• International Journal of Railway
• /
• 제6권2호
• /
• pp.45-52
• /
• 2013

Railway construction needs vast soil investigation for its infrastructure foundation designs along the planned railway path to identify the design parameters for stability and serviceability checks. The soil investigation data are usually classified and grouped to decide design input parameters per each construction section and budget estimates. Deterministic design method which most civil engineer and practitioner are familiar with has a clear limitation in construction/maintenance budget control, and occasionally produced overdesigned or unsafe design problems. Instead of using a batch type analysis with predetermined input parameters, data population collected from site soil investigation and design load condition can be statistically estimated for the mean and variance to present the feature of data distribution and optimized with a best fitting probability function. Probabilistic approach using entire feature of design input data enables to predict the worst, best and most probable cases based on identified ranges of soil and load data, which will help railway designer select construction method to save the time and cost. This paper introduces two Monte Carlo simulations actually applied on estimation of retaining wall external stability and long term settlement of organic soil in soil investigation area for a recent high speed railway project.

• 국제초고층학회논문집
• /
• 제2권3호
• /
• pp.193-212
• /
• 2013

The Endless Column by Constantin Brâncuşi is "the most radical sculpture in the history of classic modernism", "the only one of modern times that can be compared with the great Egyptian, Greek and Renaissance monuments". It "is not only an artistic masterpiece, but also an extraordinary feat of engineering", the greatest example of collaboration between a sculptor and an engineer. This article illustrates the path that led the artist to conception of the column, its planning and construction, the investigations on preservation of the monument and its restoration, the aerodynamic tests in the wind tunnel, the modeling of the wind and the structure in virtue of which the aeroelastic instability, dynamic response and fatigue life were investigated. The conclusions discuss the column's role in the panorama of the great works of modern engineering.

• 한국지반공학회:학술대회논문집
• /
• 한국지반공학회 2008년도 추계 학술발표회
• /
• pp.85-110
• /
• 2008

Ground investigation data to be used as a basis for geotechnical analysis and foundation design are usually troubled with large uncertainty, due to natural variability and limited number of data. Statistical methods can be a rational tool for handling such uncertain ground data, in particular with a view to the selection of characteristic values for estimating ground design parameters used in design. The characteristic values of soil properties for use in geotechnical design have oftenly based on not only a subjective judgment but also engineer's past acumulated experience. This paper discussed some statistical methods which can handle such intrinsic ground uncertainty data with a case design in a rational manner.

• 한국지반공학회:학술대회논문집
• /
• 한국지반공학회 2009년도 세계 도시지반공학 심포지엄
• /
• pp.785-789
• /
• 2009

It is essential to carry out appropriate site investigations for the accurate prediction of the geo-structure. However, the importance of the site investigation is often overlooked due to the time and expense constraints. In this study, several cases of geotechnical design perfromed in United States are introduced with the lessons about how the site investigations are planned, performed and applied for the actual design parameter determination. Based on the case studies presented herein, experienced geotechnical engineer should participate in site investigations from the planning stage through the final boring logs and utilize all the laboratory and field tests to have consistent input parameters for the soil constitutive models. Furthermore, it is also desired to have close relationship between construction industry and the academia to compensate their needs.

• 기술사
• /
• 제33권2호
• /
• pp.18-21
• /
• 2000

As consumer, one of the most important things how to get manufactured good is an assurance of quality. We have a consumer protection law which is weaker than product liability law(so called PL law), but stronger than civil law. In this special issue, we want to explain PL law which will be legislated within not long time and to propose a method of protection and defence in building and housing field. As the quality control of constructor, ISO 9000 series for quality assurance and CM (Construction Management) for quality assister are concerned in all construction process. Therefore, above mentioned PL law is very serious problems which are applied in apartment housing, if applied, a little part as not real estate will be possible.

• 기술사
• /
• 제46권1호
• /
• pp.58-63
• /
• 2013

2010년 이래 '국격'이라는 말이 정치지도자들이나 네티즌들 사이에 많이 회자되고 있다. 규격/표준은 '사실상의 표준[de facto standard]'과 '공적표준[de jure standard]'이 있다. 국가품질수준을 말하는 국격은 그 국가의 헌법에 규정되고 있는 내용이다. 국가의 공적인 표준인 헌법이 아무리 수준 높게 잘 제정되고 있어도 잘 준수되지 않으면 사실상의 국격은 낮게 인식된다. 한 두 프로젝트의 성공이나 어떤 정책의 성공이 당장 국격을 향상시킬 수 있는 것은 아니다 국격을 생각하는 사람은 과학과 기술을 생각해야 하는 시대이다.

• Earthquakes and Structures
• /
• 제12권4호
• /
• pp.469-478
• /
• 2017

This paper summarizes estimated seismic response results from three-dimensional nonlinear inelastic time-history analyses of some steel buckling-restrained braced (BRB) structures taking into account soil-structure interaction (SSI). The response results involve mean values for peak interstorey drift ratios, peak interstorey residual drift ratios and peak floor accelerations. Moreover, mean seismic demands in terms of axial force and rotation in columns, of axial and shear forces and bending moment in BRB beams and of axial displacement in BRBs are also discussed. For comparison purposes, three separate configurations of the BRBs have been considered and the aforementioned seismic response and demands results have been obtained firstly by considering SSI effects and then by neglecting them. It is concluded that SSI, when considered, may lead to larger interstorey and residual interstorey drifts than when not. These drifts did not cause failure of columns and of the BRBs. However, the BRB beam may fail due to flexure.