• Title/Summary/Keyword: High-rise building

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Analysis of Cost-Increasing Factors in High-rise Building Construction Projects Using Delphi Method (델파이 기법을 이용한 초고층 건축시공의 공사비 상승요인 분석방법에 관한 연구)

  • Lee, Byeong-Hun;Jin, Hyun-Soo;Kim, Kyong-Hoon;Kim, Jae-Jun
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2010.05a
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    • pp.105-109
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    • 2010
  • Nowadays, the construction of high-rise building is rapidly increasing. There are many cost-increasing factors to the management in the high-rise building construction. For large and complex projects like the high-rise building construction, the more systematic methods and tools are needed for cost control. It is important to identify major cost control items and to manage them for effective cost management in the high-rise building construction. This study proposes a method of identifying major cost-increasing factors in the high-rise building construction based on the Delphi method.

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A Fundamental Study on High-rise Building Worker Management Related to Climate Elements and Psychological Responses - Concentrated on Busan Province Climate Condition - (기후요소 및 심리적 반응에 따른 고층건물 작업자 관리를 위한 기초연구 - 부산지역 기후 중심으로 -)

  • Kim, Dae-Young
    • Journal of the Architectural Institute of Korea Structure & Construction
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    • v.29 no.3
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    • pp.105-112
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    • 2013
  • This is a fundamental study for the physiological and psychological responses of construction workers by climate elements change on the unfamiliar high-rise building job conditions. This study is based on the hypothesis that the construction workers, especially steel workers and towercrane operators, should experience more difficulties doing their job on high-rise building job conditions than doing on general building job conditions related to the climate, physiological and psychological elements. This study focuses on the analysis of former literature and research related to the high-rise building and climate to establish the frame of the further research. The study tried to find out major climate elements, construction tasks, and anticipated physiological and psychological symptoms that may have critical effects on the workers of high-rise building. This study is anticipated to provide basic data-based processing the research on safety management for high-rise building construction workers.

Prediction of downburst-induced wind pressure coefficients on high-rise building surfaces using BP neural network

  • Fang, Zhiyuan;Wang, Zhisong;Li, Zhengliang
    • Wind and Structures
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    • v.30 no.3
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    • pp.289-298
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    • 2020
  • Gusts generated by downburst have caused a great variety of structural damages in many regions around the world. It is of great significance to accurately evaluate the downburst-induced wind load on high-rise building for the wind resistance design. The main objective of this paper is to propose a computational modeling approach which can satisfactorily predict the mean and fluctuating wind pressure coefficients induced by downburst on high-rise building surfaces. In this study, using an impinging jet to simulate downburst-like wind, and simultaneous pressure measurements are obtained on a high-rise building model at different radial locations. The model test data are used as the database for developing back propagation neural network (BPNN) models. Comparisons between the BPNN prediction results and those from impinging jet test demonstrate that the BPNN-based method can satisfactorily and efficiently predict the downburst-induced wind pressure coefficients on single and overall surfaces of high-rise building at various radial locations.

Working Posture Analysis Using OWAS method of Core Wall Construction in High-rise Building (OWAS기법을 활용한 초고층 코어월 공사의 근로자 작업자세 분석)

  • Lee, Junehyuck;Kim, Taehoon;Cho, Hunhee;Kang, Kyung-In
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2016.05a
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    • pp.72-73
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    • 2016
  • Working Posture is an important factor directly connected with quality and productivity of the construction project. In particular, High-rise building construction is required to manage the working posture due to the repetitive task and unfavorable working condition such as high place work, limited space. However existing construction planning of high-rise building construction has a negative effect on the labor's productivity because it is not insufficiently considered for working posture. Therefore the purpose of this study is to suggest a work that needs improvement by analyzing labor's working posture quantitatively using OWAS method. These results would provide the basic information to improve the productivity of the construction project by supporting the construction plan considering the working posture in high-rise building.

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Particle Image Velocimetry Measurement of Unsteady Turbulent Flow around Regularly Arranged High-Rise Building Models

  • Sato, T.;Hagishima, A.;Ikegaya, N.;Tanimoto, J.
    • International Journal of High-Rise Buildings
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    • v.2 no.2
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    • pp.105-113
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    • 2013
  • Recent studies proved turbulent flow properties in high-rise building models differ from those in low-rise building models by comparing turbulent statistics. Although it is important to understand the flow characteristics within and above high-rise building models in the study of urban environment, it is still unknown and under investigation. For this reason, we performed wind tunnel experiment using Particle Image Velocimetry (PIV) to investigate and identify the turbulent flow properties and characteristic flow patterns in high-rise building models. In particular, we focus on instantaneous flow field near the canopy and extracted flow field when homogeneous flow field were observed. As a result, six characteristic flow patterns were identified and the relationship between these flow patterns and turbulent organized structure were shown.

Numerical study for downburst wind and its load on high-rise building

  • Huang, Guoqing;Liu, Weizhan;Zhou, Qiang;Yan, Zhitao;Zuo, Delong
    • Wind and Structures
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    • v.27 no.2
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    • pp.89-100
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    • 2018
  • 3D simulations based on an impinging jet were carried out to investigate the flow field of a steady downburst and its effects on a high-rise building by applying the SST k-${\omega}$ turbulence model. The vertical profile of radial wind speed obtained from the simulation was compared with experimental data and empirical models in order to validate the accuracy of the present numerical method. Then wind profiles and the influence of jet velocity and jet height were investigated. Focusing on a high-rise building, the flow structures around the building, pressure distributions on the building surfaces and aerodynamic forces were analyzed in order to enhance the understanding of wind load characteristics on a high-rise building immersed in a downburst.

Computational Analysis and an Application of Wind Environmental Effects for High-rise Buildings (초고층건물 주변의 풍환경에 대한 수치 해석 및 적용)

  • Chung Yungbea;Na Seonuk
    • 한국전산유체공학회:학술대회논문집
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    • 2001.10a
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    • pp.70-75
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    • 2001
  • This paper presents the results of numerical simulation of wind environment and wind coefficient around super high-rise building. The analysis of aerodynamic response due to wind-induced forces and wind effect to surrounding buildings is important to high-rise building. This paper simulates the wind force to the high-rise building and wind flow pattern around the high-rise building, and shows the usability of CFD analysis to design process of high-rise building. A Navier-Stokes-Solver (FLUENT) with Quick spatial discretization scheme and RNG $\kappa-\epsilon$ turbulence model has been applied to the computation of the three dimensional turbulent flow.

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A Study on Problems of High-rise Building Fires in Korea and the Basic Directions for Fire Safety of High-rise Building Design (우리나라 고층건축화재의 문제점과 그 대책의 기본방향에 관한 연구)

  • 이강훈
    • Fire Science and Engineering
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    • v.4 no.2
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    • pp.15-26
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    • 1990
  • Building become higher. larger and more complex than ever before, showing abrupt changes in building structures. forms and mechanical systems. Likewise hazads of fire and the scale of fire losses become more and more greater. Therefore. considerations for fire safety take up great portion of the building design process. In this study, problems of high-rise building fires and basic directions for fire safety of high-rise building design were studied through the statistical analysis of 138 fire cases. The results of this study are summarized as follows : ·Most of the fires in high-rise building occur on the low floors and the fire frequencies are very low on the upper floors. Fire casualties are liable to be more on the upper floors than on tile floor of fire origin. ·The important causes of evacuation failures were analyzed as being late in escape and lack of stairwell enclosures. ·The main cause of vertical fire spread is lack of stairwell enclosures. However, the fire spreads mainly through the enterior windows in apartment houses. The combustible materials in buildings act on as the major factors of horizontal fire spread and the improper fire doors play role of another the critical causes. ·The basic directions for fire safety of high-rise building design put much stress firstly on the compartmentation of the buildings effectively performing the provision of safe escape routes and the safe refuse places in buildings.

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The Study of Load Test Method for In-Site Casting Pile In High Rise Building. (초고층에서의 현장타설말뚝 재하시험방법 고찰)

  • Kim, Dae-Hak;Hong, Young-Kil;Han, Sung-Moo;Gu, Ung-Hwoe;Park, Chan-Duck
    • Proceedings of the Korean Geotechical Society Conference
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    • 2008.03a
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    • pp.385-392
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    • 2008
  • Modern city have had a lot of high-rise building in high standards and multi-level performance. Using of city space reach better stages by using integration. These skyscraper have increased working load on ground. that building is efficiently designed for that soil capacity is well applied. With material side, big size pile, high strength concrete and high strength steel is used for that getting enough lobby space and resisting load increased of high-rise building. limit load test and load transmitted test can make soil capacity optimized. By the way, method of measuring pile capacity is more advanced and bigger. pile type applied by high rise building have underground excavation space, also reflect regional soil property and have some fact reviewed. A lot of high rise building recently is built as land mark in Seoul, Busan and Incheon. about method of measuring capacity of foundation pile, example of construction field is compared and reviewed.

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