• Title/Summary/Keyword: Preliminary Evaluation

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Strength Demand Calculation for Retrofitting Unreinforced Masonry Buildings Based on the Displacement Coefficient Method and the Preliminary Seismic Evaluation Procedure (변위계수법 및 약산식 내진성능평가에 기초한 비보강 조적조 건물의 내진보강 요구강도 산정)

  • Seol, Yun Jeong;Park, Ji-Hun;Kwak, Byeong Hun;Kim, Dae Ho
    • Journal of the Earthquake Engineering Society of Korea
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    • v.26 no.1
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    • pp.31-38
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    • 2022
  • Based on the nonlinear static analysis and the approximate seismic evaluation method adopted in "Guidelines for seismic performance evaluation for existing buildings, two methods to calculate strength demand for retrofitting individual structural walls in unreinforced masonry buildings are proposed." The displacement coefficient method to determine displacement demand from nonlinear static analysis results is used for the inverse calculation of overall strength demand required to reduce the displacement demand to a target value meeting the performance objective of the unreinforced masonry building to retrofit. A preliminary seismic evaluation method to screen out vulnerable buildings, of which detailed evaluation is necessary, is utilized to calculate overall strength demand without structural analysis based on the difference between the seismic demand and capacity. A system modification factor is introduced to the preliminary seismic evaluation method to reduce the strength demand considering inelastic deformation. The overall strength demand is distributed to the structural walls to retrofit based on the wall stiffness, including the remaining walls or otherwise. Four detached residential houses are modeled and analyzed using the nonlinear static and preliminary evaluation procedures to examine the proposed method.

Development of an Evaluation System for BIM-based Friendly-Environment Preliminary Certification -Focusing on the Evaluation of Minimizing Waste Material in the Apartment unit plan- (BIM기반 친환경 예비인증 평가시스템 개발에 관한 연구 -단위세대 평면에서 폐기물 최소화 평가를 대상으로-)

  • Oh, Kunsoo;Song, Jeonghwa;Kim, Kyung Hwan
    • Journal of Digital Contents Society
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    • v.13 no.4
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    • pp.483-490
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    • 2012
  • The evaluation procedure of friendly-environment Preliminary certification is traditionally done by hand. It takes much time and a lot of manpower. Sometimes it is subject to the evaluator's experience. The solution to these problems is to systematize the evaluation procedure. The system can provide an objective standard for evaluation. It can develop more reliable standard, prevent errors, and save time. Therefore, this research suggests the evaluation system using the architectural information based BIM. To do this, the current study examines the possibility of evaluation system of friendly-environment Preliminary certification.

A Study on the Deterministic Evaluation Method of R&D Project in Food Industry (식품산업 연구개발의 결정론적 평가방법에 관한 연구)

  • 이종만;이근희
    • Journal of Korean Society of Industrial and Systems Engineering
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    • v.14 no.23
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    • pp.57-64
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    • 1991
  • The preliminary, advanced and final evaluation of R&D project is essential in order to reduce loss of resource and opportunity and to minimize uncertainty resulting from optimal selection and efficient progress of R&D project. This thesis examined characteristics of deterministic evaluation, economical evaluation, and OR-approach evaluation as theoretical methodology of evaluation of R&D project applicable to food industry in Korea by using scoring method, one of deterministic evaluations. In addition, this thesis divided the evaluation factors for preliminary evaluation of R&D project into 5 groups and 30 factors on basis of the environment of domestic companies and set up the standard of each evaluation factors and contains marking-selecting way. But, generally, the evaluation model by this thesis, as the conditions of the business company environment are different to each other, contents to be set up evaluation factors, evaluation standard and decision method conforming to each the environment of the business companies with referring to as one standard of evaluation project for selecting R&D project.

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Development and Application of Evaluation Tool for Sexuality Education in Elementary School (초등학교 성교육 평가도구 개발 및 적용)

  • Yang Soon-Ok;Jeong Geum-Hee;Kim Shin-Jeong;Lee Que-Young;Baek Sung-Sook
    • Child Health Nursing Research
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    • v.8 no.3
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    • pp.334-343
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    • 2002
  • This study was aimed at primarily to develop a tool to evaluate sexuality education and secondarily to test effectiveness through application of developed evaluation tools in elementary school. The results from this study were summarized below: 1. On the basis of targeting the lower grades (1st- 3th year) and the higher grades (4th-6th year) elementary school students' sexuality education guidebooks published by Korea Ministry of Education & Human Resources Development, 71 preliminary items targeting the lower grades, 90 preliminary items targeting the higher grades were developed. 2. Through the validity test about the contents of the preliminary items three times, the items were regulated to 65 items targeting the lower grads and 57 items targeting the higher grades. And then, the preliminary items were re-regulated to 40 items separately. Then, pre-test which targeting each 30 students was enforced. 3.Finally, the evaluation tools for sexuality education that consisted of 40 items targeting the lower grades and the higher grades were developed. 4. eliability test of the developed tools, sexuality education evaluation tools showed alpha coefficient of internal consistency were 0.8355 (for the use of the lower grades) and 0.8881 (for the use of the higher grades). 5. o apply the developed sexuality education evaluation tools, 10-times sexuality education were carried out class unit and pre-post test were done using same questionnaire, which contains developed tool, there were significant difference in low grade (t=16.548, p=0.000), high grade (t=14.773, p=0.000). The results of this study suggest that the evaluation tool for sexuality education in elementary school may be a useful tool with a high degree of reliability and validity. In this sense, the evaluation tool for sexuality education developed by this study can be effectively utilized in Korea elementary schools.

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Research on the Development of Economic Value Evaluation Indices for Public Libraries

  • Noh, Younghee
    • International Journal of Knowledge Content Development & Technology
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    • v.7 no.3
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    • pp.87-111
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    • 2017
  • The purpose of this study is to develop an evaluation index for evaluating the economic value of libraries. To this end, a preliminary evaluation index was derived from analyzing a total of approximately 60 domestic and foreign papers that examined the value of libraries. Based on the derived preliminary evaluation index, 11 experts were selected and the final evaluation index was developed by conducting the Delphi survey for 3 times. The final evaluation index consists of four evaluation areas, such as the economic value of the public library, economic revitalization, manpower development and job creation, and the improved investment value, seven evaluation items, and 22 evaluation indices. In the future, it will be necessary to conduct research to measure the economic value of public libraries.

Some Thoughts on the Preliminary Seismic Performance Evaluation Procedure of Subway Infrastructures (도시철도 시설물의 내진성능 예비평가체계에 대한 소고)

  • Park, Beom-Ho;Lim, Nam-Hyoung;Lee, Tae-Hyung;Kim, Kee-Dong;Kim, Jin-Ho
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.11 no.2
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    • pp.666-674
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    • 2010
  • There is a few problems in the preliminary seismic performance evaluation procedure of subway infrastructures, such as cut-and-cover tunnel structures and bridge structures, recently because the characteristics of subway infrastructures are not properly considered in the procedure. In particular, the evaluation procedure of vehicular bridge structures is applied to subway bridges without any modification. Moreover, the present evaluation procedure is lack of both theoretical and empirical backgrounds, which makes the evaluation less reliable. This paper presents problems in the existing preliminary evaluation procedure and proposes possible modification(revision) to the procedure.

Seismic Performance Evaluation of Unreinforced Masonry Buildings Retrofitted by Strengthening External Walls (외부벽체 강도증진형 보강이 적용된 비보강 조적조 건물의 내진성능평가)

  • Seol, Yun Jeong;Park, Ji-Hun
    • Journal of the Earthquake Engineering Society of Korea
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    • v.24 no.2
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    • pp.77-86
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    • 2020
  • Nonlinear static analysis and preliminary evaluation were performed in this study to evaluate the seismic performance of unreinforced masonry buildings subjected to various soil conditions based on the revised Korean Building Code. Preliminary evaluation scores and nonlinear static analyses indicated that all buildings were susceptible to collapse and did not reach their target performance. Therefore, retrofit of those building models was carried out through a systematic procedure to determine areas to be strengthened. It was possible to make most building models satisfy performance objectives through the reinforcement alone of damaged external shear walls. However, the application of a preliminary evaluation procedure to retrofit design was found to be too conservative because all the retrofitted building models verified with nonlinear static analysis failed to satisfy performance objectives. Therefore, it is possible to economically retrofit unreinforced masonry buildings through the fortification of external walls if a simple evaluation procedure that can efficiently specify vulnerable parts is developed.

Decision Making of Seismic Performance Management Using Seismic Risk Assessment (지진위험도평가 방법을 이용한 내진성능관리 의사결정)

  • Kim, Dong Joo;Choi, Ji Hye;Kim, Byeong Hwa
    • Journal of the Earthquake Engineering Society of Korea
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    • v.23 no.6
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    • pp.329-339
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    • 2019
  • The strategy for the management of earthquakes is shifting from post recovery to prevention; therefore, seismic performance management requires quantitative predictions of damage and the establishment of strategies for initial responses to earthquakes. Currently, seismic performance evaluation for seismic management in Korea consists of two stages: preliminary evaluation and detailed evaluation. Also, the priority of seismic performance management is determined in accordance with the preliminary evaluation. As a deterministic method, preliminary evaluation quantifies the physical condition and socio-economic importance of a facility by various predetermined indices, and the priority is decided by the relative value of the indices; however, with the deterministic method it is difficult to consider any uncertainty related to the return-year, epicenter, and propagation of seismic energy. Also this method cannot support tasks such as quantitative socio-economic damage and the provision of data for initial responses to earthquakes. Moreover, indirect damage is often greater than direct damage; therefore, a method to quantify damage is needed to enhance accuracy. In this paper, a Seismic Risk Assessment is used to quantify the cost of damage of road facilities in Pohang city and to support decision making.

Effectiveness Analysis of Preliminary Evaluation of Public Library Establishment Feasibility Based on the Revised Library Act (도서관법 개정에 따른 공공도서관 설립 타당성 사전평가의 실효성 분석)

  • Kim, Hyo-Yoon
    • Journal of Korean Library and Information Science Society
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    • v.53 no.3
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    • pp.119-135
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    • 2022
  • The purpose of this study is to determine whether the pre-evaluation of the feasibility of establishing a public library, which is mandatory according to the revision of the Library Act, can improve the quality of the library. Therefore, the effectiveness of the preliminary evaluation was analyzed through the case analysis of the preliminary evaluation of the public library construction support project, which was implemented for the same purpose before the revision of the Library Act. In the case of libraries built after preliminary evaluation, most of the minimum standards for legal librarians required by the Enforcement Decree of the Library Act were secured, which helped secure basic library personnel. However, there were few libraries that secured and operated as much manpower as originally planned, and in some cases, the application applied to operate the library directly, but it was changed to consignment operation at the time of opening, so the pre-review details were not faithfully reflected. This study proposed re-establishing realistic librarian placement standards according to the revision of the law and introducing a post-evaluation using the library registration system so that it would not be a formal pre-process through case analysis.