• Construction Engineering and Management
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• v.12 no.4
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• pp.31-33
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• 2011

• Proceedings of the Safety Management and Science Conference
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• 2012.11a
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• pp.21-30
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• 2012

이동식 크레인과 관련한 안전사고가 다발하고 있음에도 국내 대부분의 건설현장에서는 아직도 관리감독자와 크레인 운전자의 경험에 의존하여 장비를 선정하고 운용하고 있는 실정이다. 본 연구를 통해 건설현장에서 발생한 이동식 크레인 전도사고사례와 위험성 평가를 실시한 결과 이동식 크레인을 이용한 안전한 자재 양중작업을 위하여 중량물의 무게 형상, 인양장비 제원, 정격하중, 작업반경 등을 고려한 중량물 취급작업계획을 작성 준수하고 이동식 크레인의 제작 설계기준 준수를 위하여 이동식 크레인 제조사에서 제공하는 사용(취급)설명서를 준수하며 위험성 평가 결과가 실제 이동식 크레인을 사용한 양중작업에 적용 가능하도록 지속적인 관리 등이 요구됨을 알 수 있었다.

• Computational Structural Engineering
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• v.16 no.4
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• pp.10-22
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• 2003

• Construction Engineering and Management
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• v.17 no.4
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• pp.15-19
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• 2016

• Construction Engineering and Management
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• v.11 no.1
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• pp.15-18
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• 2010

• Korean Journal of Construction Engineering and Management
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• v.9 no.2
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• pp.108-116
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• 2008

At present, construction automation is a critical solution for the shortage of labor and the aging of skilled workers. Especially, researches for transportation automation are achieved to improve the efficiency as the construction of tall-building construction. Transportation automation needs to control the swung member by the inertia and/or the wind-force at the end of cable. However, previous to control, the presupposition of the swing is heavily difficult work because the inertia and the wind force are irregularly changable according to work condition. Therefore, in this study, dynamic modeling of crane and simulation was performed to find the characteristic of the swing. In the result, the maximum displacement of the swung material was analyzed. And, on the basis of analysis, the criteria to decide workability of automated transportation considering the material size and the wind force onsite was proposed.

• Journal of the Korea institute for structural maintenance and inspection
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• v.19 no.2
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• pp.143-150
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• 2015

At present, the actual condition is that Korean modular structures are limited to a low rise detached house and military barracks. And there is no standardized structural design method of stacked modular structure. Accordingly, in general, they don't review impact force in the stage of stacking and installing a module, the effect which wind load has on a structure in the stage of lifting, and inertial force occurring in the stage of lifting or transporting a module in the process of constructing a structure. Therefore, this study investigated the construction method of modular system to be studied in stages, and decided on the position to which load was applied and boundary condition in structural analysis at each construction stage. Besides, inertial force according to each speed was calculated in the lifting and wheeled transport of module. And we calculated impact load according to lifting speed in module stacking and installation work and wind load due to instantaneous wind speed in the installation work by lifting. On the basis of the suggested method, in the modular system to be studied, it carried out review of structure by changing determining conditions of load being applied by construction stage, such as in the stage of lifting, in the stage of transport, and in the stage of installation, and drew construction conditions securing stability structurally.

• Korean Journal of Construction Engineering and Management
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• v.15 no.6
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• pp.53-62
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• 2014

Recently, the number of super high-rise building projects have been increased after recovering from international financial crisis. In super high-rise building project, vertical lifting is critical to overall project productivity, due to its limited lifting equipments. Also for projects which buildings' height are higher than 400m, transfer operation in lifting is inevitable because of lifts' maximum lifting height. In transfer operation, setting a transfer floor is essential for saving lifting time of resources. In this research, using discrete event simulation modeling with AnyLogic 7.0 software and metaheuristic optimization with OptQuest software, the method of optimizing a transfer floor for workers during the morning peak time is proposed. Comparing to the result of the case which transfer floor is designated to the middle floor, setting optimized transfer floor significantly decrease the total lifting time of workers. By using proposed simulation and optimization tool, saving budget and time through increasing available working hour is expected.

• Proceedings of the Korean Institute Of Construction Engineering and Management
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• 2008.11a
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• pp.628-633
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• 2008

Tall building construction has been increasing due to the need to maximize land usage. It causes the increase of vertical transportation for workers and materials, which significantly affects the productivity and lifting planning, therefore, has to be made carefully based on the characteristics of the field. However, the existing method to calculate the number of lift is too simple to consider complex and various characteristics in tall building construction. Accordingly, we developed the model for selecting the best system of vertical transportation by using Queueing theory. To find out the situation of the queue of resources such as material and workers, a simulation program will be applied.

• Proceedings of the Korean Institute Of Construction Engineering and Management
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• 2007.11a
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• pp.436-440
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• 2007

As the construction projects become higher, larger and more complex, they become more dangerous, especially vertical transportation activities. So this study analyzed 122 critical accident cases reported to the KOSHA(Korea Occupational Safety & Health Agency) for construction cranes by types of cranes, patterns of accidents and causes. It is expected that the results of this study can be used as useful basic data or material when preparing for special safety education and training for preventing crane accidents.