• Title/Summary/Keyword: Structural Safety

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Structural Analysis of Door Safety Device (도어 안전장치의 구조해석)

  • Lee, Jong-sun
    • Journal of the Korea Convergence Society
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    • v.10 no.9
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    • pp.173-177
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    • 2019
  • This study is door safety device for the structural analysis are described. Recently emerged as a key point of the door safety and increase the need of a door safety device. In order to improvement this inconvenience, the door safety device was design and structural analysis by using CATIA. CATIA utilizes door safety device element model for displacement, stress and strain energy were obtained. Consideration of door open angles were $95^{\circ}$, $100^{\circ}$, $105^{\circ}$, $110^{\circ}$, $115^{\circ}$, $120^{\circ}$. These results will be provided to develop new concepts of door safety device as initial data.

Landscape Design Method of Bridges and Visual Safety Estimation of Structural Shape (교량의 경관설계 방법과 구조형상의 시각적 안전성 평가)

  • Yang, Seung Hyoun;Shiomi, Hiroyuki
    • Journal of the Korea institute for structural maintenance and inspection
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    • v.2 no.3
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    • pp.235-244
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    • 1998
  • In the design of bridges, the points of concem are the landscape design, the function, safety and economical efficiency. But most of studies have been performed on structural engineering. The study on the landscape design of bridges has not been done in korea. Therefore, in this research, the design method of bridges by the judgement of structural engineering and landscape engineering has been proposed, through the process to decide the shape of bridges. Also, the research studies a problem about the visual safety of the structural shape in the landscape design of bridges. The visual experiments applied to the seven models about the shape of hunch in bridge pier. The experiment was made in moving velocity of view point, steady looking time and track of eyeball movement.

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Development of Integrated System for Safety Assessment of Damaged Ship (손상선박의 안전성 평가를 위한 통합시스템 개발)

  • Lee, Soon-Sup;Lee, Dong-Kon
    • Korean Journal of Computational Design and Engineering
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    • v.13 no.3
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    • pp.227-234
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    • 2008
  • The number of marine accidents have been decreased since various equipments for navigation control have been introduced to the marine vessels. However, disastrous marine accidents such as ship collisions are occurred more frequently. Therefore, IMO(International Maritime Organization) is enforcing the design requirement of structural strength for marine vessel. Also EU countries are developing new design methodologies and design tools to suggest the design guidance which can minimize the damage of commercial vessels in case of marine collision accidents. In this study, an integrated design system for the safety assessment has been presented to enhance the safety of damaged ships in marine collision accidents. The architecture of system is described by use-cases and IDEF functional analysis. Then an integrated system for safety assessment of damaged ship which is considering both damage stability and structural safety has been developed to support the ship design in early stage.

A Design Variable Study of Plane Stress Element by Reliability Analysis (신뢰성 해석에 의한 평면응력요소의 설계변수 분석)

  • 박석재;최외호;김요숙;신영수
    • Proceedings of the Computational Structural Engineering Institute Conference
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    • 2001.04a
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    • pp.102-109
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    • 2001
  • In order to take account of the statistical properties of probability variables used in the structural analysis, the conventional approach using the safety factor based on past experience usually estimated the safety of a structure. The real structures could only be analyzed with the error in estimation of loads, material characters and the dimensions of the members. But the errors should be considered systematically in the structural analysis. Structural safety could not precisely be appraised by the traditional structural design concept. Recently, new approach based on the probability concept has been applied to the assessment of structural safety using the reliability concept. Thus, the computer program by the Probabilistic FEM is developed by incorporating the probabilistic concept into the conventional FEM method. This paper estimated for the reliability of a plane stress structure by Advanced First-Order Second Moment method using von Mises, Tresca and Mohr-Coulomb failure criterions. The reliability index and failure probability of attained by the Monte Carlo Simulation method with the von Mises criterion were same as PFEM, but the Monte Carlo Simulation were very time-consuming. The variance of member thickness and load could influence the reliability and failure probability most sensitively among the design variables from the results of the parameter analysis. And proper failure criterion must be used to design safely.

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Safety Performance Assessment for a Aged Building (노후 건축물의 안전성능 평가항목)

  • Kwon Dong-Chan;Lee Yong-Jae;Lee Chan-Sik
    • Proceedings of the Korean Institute Of Construction Engineering and Management
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    • 2004.11a
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    • pp.296-300
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    • 2004
  • As a building aged, overall performance considering structural safety, equipment safety and fire safety is lowering gradually. Since the building performance and the overall value of the building change as time elapse, exact safety performance of the building should be evaluated not only maintaining the building efficiently and also preventing disputes between buyer and seller of the building. We suggest major elements for assessing building's safety performance through surveying literatures, interviewing experts, reviewing existing assessment models, The assessment elements proposed here ate comprised of structural safety, equipment safety, fire safety, fire protection and fire escape, etc. This study helps to make a safety performance assessment criteria for a building.

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Structural Safety Evaluation System of Existing low-rise Reinforced Concrete Buildings to Remodeling (리모델링을 위한 기존 저층형 철근콘크리트의 안전성 평가 시스템)

  • 김진수;김창은
    • Journal of the Korea Safety Management & Science
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    • v.5 no.3
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    • pp.69-80
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    • 2003
  • This study researched problems of safety inspection method and current legislative system for the structure safety evaluation of Rahmen structure affected by remodeling. The elements of weight increase were examined in terms of differences of load moment, shear force, compressive stress and amount of steel before and after remodeling by structure analysis. The thorough examination for impacts of weight increase is indispensable to change of use or extension.

Structural Safety Analysis of Electric Kickboard According to Shape of Connection Parts Using Finite Element Analysis (유한요소해석 기반의 전동 킥보드 연결부 형상에 따른 구조적 안전성 분석)

  • Kim, Min Gyu;Kim, Jung Jin
    • Journal of the Korean Society of Manufacturing Process Engineers
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    • v.20 no.12
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    • pp.65-70
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    • 2021
  • Electric kickboards are inviting attention as next-generation transportation systems with their number of users increasing rapidly every year. However, the number of related accidents similarly increases with the increase in the number of users. The purpose of this study is to analyze the structural safety of electric kickboards according to the shape of the connection parts. For this purpose, four different shapes of the connection parts, i.e., cube, cylinder, toroid, and divided cube were selected. Subsequently, the safety was analyzed based on the finite element (FE) analysis under the front collision scenario. The results showed that the shape of the divided cube induced the lowest von Mises stress and the highest safety factor amongst the four models. Moreover, only the shape showed a safety factor higher than 1. However, the shape of the cylinder exhibited the lowest structural vulnerability. These results demonstrate the importance of the shape of the connection part in maintaining the overall safety of an electric kickboard.

Formulation of Fire Reliability Assessment Method for Structural Strength (화재 구조강도에 대한 신뢰성 평가방법의 정립)

  • 양영순;유원선;이상엽
    • Proceedings of the Computational Structural Engineering Institute Conference
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    • 2004.04a
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    • pp.161-168
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    • 2004
  • This study describes the behavior and failure probability of basic structural member in case of fire for the research of safety assessment on onshore structure. Fire safety assessment can be done by comparing fire resistance of members with fire severity of heat load For more Practical applications, the commercial structural analysis program is linked with the in-house code and gets the limiting temperature by analyzing structural strength of member with elasto-plastic analysis and large deflection analysis. AFOSM method is utilized to obtain the failure probability against the fire. The examples of rather simple structures such as beams and plates are applied to explain and verify the procedure of fire safety assessment.

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Structural safety and Disaster Management Technologies applied in High-rise Buildings (초고층 건축물에 적용되는 구조안전 및 재난관리 기술)

  • Jeon, Hyun-Soo;Yang, Won-Jik;Yi, Waon-Ho
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2015.11a
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    • pp.89-90
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    • 2015
  • Recently, Incidence of natural disasters are growing gradually. The need for a monitoring system for maintaining the structural integrity of the high-rise buildings against extreme weather events such as typhoons, earthquakes is increasing gradually. One of the most important features in the tall building is to guarantee structural safety during the structure's life time. Structural monitoring technologies might be needed to manage structural safety and to protect human life.

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A Study on the Structural Analysis for Plastic Door Handle of Automobile (플라스틱 자동차 손잡이 구조물의 구조해석에 관한 연구)

  • Park, S.R.;Shim, D.C.;Kim, D.;Lyu, M.Y.
    • Transactions of Materials Processing
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    • v.19 no.3
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    • pp.185-190
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    • 2010
  • Application of CAE analyses are wide spread in shaping processes and structural safety verification of plastic products. The importance of CAE analysis and its contributions are getting increase since the processibility and structural safety of product can be predicted. CAE analysis for complex shaped product need a lot of time for modeling and computation compare with simpler one. Therefore careful simulation modeling is required for complex shaped product. Structural analysis for plastic door handle of automobile has been performed and structural safety has been investigated for various load directions and modeling cases. Large stress occurred at the hinge in handle regardless of load direction and modeling case. Consequently hinge is considered structurally very weak among the parts in plastic door handle. It is concluded that simple modeling rather than total modeling with adequate boundary condition equivalent to real situation gives reasonable computational results with saving modeling effort and computation time.