• Title/Summary/Keyword: Urban Infrastructures

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Some Thoughts on the Seismic Performance Evaluation Procedure of Urban Railway Infrastructures (도시철도 시설물의 내진성능평가체계에 대한 소고)

  • Hur, Jin-Ho;Kim, Jin-Ho
    • Proceedings of the KSR Conference
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    • 2011.05a
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    • pp.1539-1543
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    • 2011
  • Due to recent large earthquakes around the world, there are increasing social needs for seismic safety of urban railway infrastructures. Urban railway infrastructures are applied different seismic performance evaluation procedure each of overground structures, underground structures and bridge structures, and the characteristics of urban railway infrastructures are not properly considered in the procedure. This study presents problems in the existing seismic performance evaluation procedure of urban railway infrastructures and proposes necessities of unified evaluation procedure.

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Establishment of Resilient Infrastructures for the Mitigation of an Urban Water Problem: 1. Robustness Assessment of Structural Alternatives for the Problem of Urban Floods (도시 물 문제 저감을 위한 회복탄력적 사회기반시설 구축: 1. 도시 홍수 문제 구조적 대안의 내구성 평가)

  • Lee, Changmin;Jung, Jihyeun;An, Jinsung;Kim, Jae Young;Choi, Yongju
    • Ecology and Resilient Infrastructure
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    • v.3 no.2
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    • pp.117-125
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    • 2016
  • Current cities encounter various types of water problems due to rapid urbanization and climate change. The increasing significance of urban water problems calls for the establishment of resilient alternatives to prevent and minimize social loss that results from these phenomena. As a background research for establishing resilient infrastructures for the mitigation of urban water problems, we evaluated the robustness of structural alternatives for urban flood as a representative case. Combining the robustness index (RI) and the cost index (CI), we suggested the robustness-cost index (RCI) as an indicator of the robustness of structural alternatives, and applied the index to assess the existing infrastructures and structural alternatives (i.e., sewer network expansion, additional storage tank construction, and green roof construction) at a site prone to floods located around Gangnam-station, Seoul, Korea. At a rainfall intensity frequency range of 2 to 20 years, the usage of a storage tank and a green roof showed relatively high RCI value, with a variation of an alternative showing greater RCI between the two depending on the size of design rainfall. For a rainfall intensity frequency of 30 years, installing a storage tank with some green roofing was the most resilient alternative based on the RCI value. We proposed strategies for establishing resilient infrastructures for the mitigation of urban floods by evaluating the robustness of existing infrastructures and selecting optimal structural alternatives with the consideration of scales of design disaster.

A Study on Implementaion of the GIS Based u-City urban Infrastructures (GIS기반 u-City 도시 인프라 구축에 관한 연구)

  • O, Jong-U;O, Seung-Hun
    • 한국디지털정책학회:학술대회논문집
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    • 2006.12a
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    • pp.379-386
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    • 2006
  • The purpose of this paper is to analyze the implementation of the GIS infrastructure systems for the u-City, GIS base u-City represents spatial information derived fields, such as geographical distribution of the urban boundaries, physical configuration of the urban locations and cultural characteristics of the urban history. These three aspects relate to urban infrastructure systems implementation, urban monitoring center implementation, and spatial database implementation. In terms of the GIS based u-Ci쇼 urban infrastructure implementation systems, the u-City depends on IT contents and spatial features. IT contents are strongly related to IT839 strategy due to the national agenda is "u-Korea". GIS should contribute to u-City construction through the spatial analyses methods. For these methods various GIS functions will guide to u-City's distribution, location, and characteristics of urbanization. The infrastructure consists of road and road facilities, underground facilities, related agencies facilities, dispatch systems, environmental systems, and urban planning. These six units of the urban infrastructures have spatial databases that consist of spatial configuration, such as dots, lines, and polygons in order to draw the spatial distribution of the u-City GIS based u-City urban infrastructure implementation systems should deal with It convergence to generate fusion affects.

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Application of the Cost-Distance Measures for Designating Zone Boundaries in DIF Zoning

  • Choi, Joon Young;Choei, Nae Young
    • Journal of Korean Society for Geospatial Information Science
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    • v.24 no.2
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    • pp.3-13
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    • 2016
  • The development impact fee (DIF) zoning is used to adequately provide the pre-planned urban infrastructures in those urban and regional sectors where significant urban sprawl has already taken place followed by the rapid population growth. The infrastructure installation fees are levied to those landowners whose properties belong to the DIF zone in which they enjoy the direct benefits that accrue from the installed infrastructures. While the law is deemed to be equitable in that the actual beneficiaries pay for their benefits, it is required to designate the zone boundaries accurately and consistently since they are the very dividers that differentiate the legitimate fee-payers and the free-riders. This study, especially, tries to test a seemingly advanced alternative, so-called the cost-weighted distance measure, as a potential candidate to replace the current air-distance measures to designate the zone boundaries. The statistics indicate that the coefficient of variation for major indices spread from 11.75 to 35.6 in the case of the latter method, it only ranges from 0.21 to 0.76 in the case of the former. The zonal outcomes also show much higher consistency in their shapes. It is hoped, in this context, that the study findings could possibly be adopted in the future research efforts expected soon to amend and improve the current DIF zoning law.

VULNERABILITY ASSESSMENTS AND RISK MANAGEMENT FOR CRITICAL INFRASTRUCTURES FROM HOMELAND SECURITY VIEWPOINTS

  • Chun Nen Huang;Yao-Chen Kuo
    • International conference on construction engineering and project management
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    • 2009.05a
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    • pp.292-301
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    • 2009
  • The employment of risk management theory in Urban Disaster Management System (UDMS) has become an important trend in recent years. The viewpoint of risk management is mainly a comprehensive risk assessment of various internal and external factors, and a subsequent handling of risks. Through continuous and systematic accumulation and analysis of risk information, disaster prevention and rescue system is established. Taking risk management theory as the foundation, Organization for Economic Cooperation and Development (OECD) has developed a series of UDMS in the mega-cities all over the world. With this system as a common platform, OECD cooperates with different cities to develop disaster prevention and rescue system consisting of vulnerability assessment methods, risk assessment and countermeasures. The paper refers to the urban disaster vulnerability assessment and risk management of OECD and the mega-cities of different advanced and developed countries in the world, and then constructs a preliminarily drafted structure for the vulnerability assessment methods and risk management mechanism in the metropolitan districts of Taiwan.

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A Study on the Characteristic of Ubiquitous Infrastructure for u-City (u-City 도시기반시절의 특성에 관한 연구)

  • Eum, Min-Kyung;Song, Seung-Min;Kim, Do-Nyun
    • Korean Journal of Construction Engineering and Management
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    • v.12 no.5
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    • pp.93-102
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    • 2011
  • IT technologies applied in the urban places are being promoted in each area. Especially infrastructure is performed in the central role of technical support in urban area. However, u-City infrastructure has lack of integrated way and concentrated on only feasible technology which cause frequent substitution and the nested technology in urban area. Therefore this study sheds light on infrastructure through a overall considerations of urban compositional elements and interactions, and apply technology in the process of the industrial era, the domestic supply of urban infrastructure and the cycle comparison-analysis deal with the domestic implications when applied. The results of the study, first, the u-City infrastructure should be supplied by public. Second, u-City infrastructure is in need of the agile character, and standardization of the subtleties is needed. Third, a new system of integrated-macroscopic perspective should be established by changes that influenced by convergences of IT technologies and infrastructures. Fourth, u-City infrastructures planning should consider interactions of services, devices and systems.

A Study of Appropriate Contributed Acceptance of Urban Infrastructure in Urban Renewal Project - Focused on the Gongpyung Renewal District - (수복형 도시정비사업의 정비기반시설 적정 기부채납에 관한 연구 - 서울시 공평구역 사례를 중심으로 -)

  • Na, In-Su
    • Journal of KIBIM
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    • v.12 no.1
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    • pp.35-41
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    • 2022
  • This research aims to find the issues and explore policy agenda of contributed acceptance of urban renewal project. Through the analysis of urban renewal project in Seoul, three isssues was found as follows. Firstly, the ratio of contributed acceptance in each district was quite different. Secondly, the donated land was scattered around whole project area. Thirdly, infrastructures are not constructed until all renewal projects were implemented. For this issues, this research proposed that a proper standard of the ratio of contributed acceptance is needed and land donation should be designated to adjacent lot or block. Also public support should be for developing urban capacity and completing infrastructure.

Comparative Analysis of Land Use Change Model at Gapcheon Watershed (갑천 유역을 대상으로 토지이용예측모델 비교 분석)

  • Kwon, PilJu;Ryu, Jichul;Lee, Dong Jun;Han, Jeongho;Sung, Yunsoo;Lim, Kyoung Jae;Kim, Ki-Sung
    • Journal of Korean Society on Water Environment
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    • v.32 no.6
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    • pp.552-561
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    • 2016
  • For the prediction of hydrologic phenomenon, predicting future land use change is a very important task. This study aimed to compare and analyze the two land use change models, CLUE-S and SLEUTH3-R. The analysis of two models were performed based on the MSR value such that the model with more reliable MSR value can be recommended as an appropriate land use change prediction model. The model performance was examined by applying to the Gapcheon A watershed. Land use map of the study area of 2007 obtained from the Ministry of Environment was compared with the predicted land use map obtained from each of the two models. The result from both models showed somewhat similar results. The MSR value obtained from CLUE-S was 0.564, while that from SLEUTH3-R was 0.586. However, when land use map of 2010 was compared with predicted land use map obtained from the two models in same manner, the MSR value obtained from CLUE-S' was 0.500 while that from SLEUTH3-R was decreased to 0.397, an approximately 32.3% decrease from previous value of 2007. Moreover, SLEUTH3-R showed more sensitivity in conversion of urban areas, as compared to other land use types. Therefore, for the prediction of future land use change, CLUE-S model is more reliable than SLEUTH3-R.

Otemachi(大手町) Sequential Urban Redevelopment Project

  • Itoh, Toshio
    • Land and Housing Review
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    • v.8 no.2
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    • pp.83-89
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    • 2017
  • Otemachi(大手町) is the region where it plays a pivotal role in Japanese economy as representative head offices of companies including financial insurance, general trading, information and communication newspaper media are concentrated. However, regenerating the entire region from worn-out infrastructures of buildings and city into the fresh and vibrant foothold in international business was the problem to be solved. In this situation, was examined on the basis of administrative agencies and relevant enterprises to reconstruct office buildings in phases without ceasing business functions and activities by utilizing the large-scale vacant land occurred from the relocation of the national public institutions. The independent administrative institution 'Urban Renaissance Agency(UR)' has completed the examination of industrialization and participation request for the commencement of the project. In this article, The overview of , the new form of project promoted and cooperated by officials and people, is introduced by UR (Urban Renaissance Agency) reorganizing the land exchange and infrastructure through the land readjustment project, and at the same time, procuring capital and building office buildings in solidarity with private development enterprises and financial institutions.