• Title/Summary/Keyword: PEB 시스템

Search Result 18, Processing Time 0.022 seconds

Experimental Study on Structural Performance of Tensile Brace in P.E.B Steel Frames (P.E.B 강골조에서 인장가새의 구조성능에 관한 실험연구)

  • Kim, jong Sung
    • Journal of Korean Society of Steel Construction
    • /
    • v.19 no.5
    • /
    • pp.549-558
    • /
    • 2007
  • Hook bolt brace is being used to construct pre-engineered building's (PEB) systematic frames in steel factory building, but they pose difficulties in terms of their structural performance. There are also few studies on their behavior and there is a need to develop elementary techniques by conducting loading tests on other types of braces (e.g., rod bar, rod shoe, angle), which is used in Japan and the USA. Its structural performance is compared with that of current hook bolt-type brace. Therefore, in this study, we present a basic step in the structural performance of these specimens to examine its performance qualitatively and theof application to PEB frames.

Self-Optimizing Structural Design of a Pre-engineered Building System with Nonprismatic Members based on AISC2005 (AISC2005에 기준한 변단면 선설계 건축물시스템의 자동화 최적구조설계)

  • Kim, Yong Seok;Oh, Myoung Ho;Song, Byung Kyu
    • Journal of Korean Society of Steel Construction
    • /
    • v.21 no.2
    • /
    • pp.193-201
    • /
    • 2009
  • Structural design of most nonprismatic Pre-Engineered Building Systems (PEBS) is performed using optimizing software developed in foreign countries. In this study, a structural optimizing software for the design of 3-D structures of nonprismatic PEBS is developed according to the allowable stress design method of AISC2005 and KBC. Optimizing structural design with nonprismatic members is carried out by repeating the process of structural analysis and member design to minimize the weight of a structure. According to the optimizing design results of 2-D and 3-D structures with nonprismatic members, there are considerable steel savings in designing structures with nonprismatic H-shaped built-up sections rather than with H-shaped rolled sections. When H-shaped built-up sections were used, the weight of the structural steel was reduced when AISC2005 specification rather than AISC1898 was used in the design. It is therefore concluded that utilizing the new AISC2005 specification is safer in preventingweb buckling because the height of a member is designed to be small despite some differences depending on the structural type.

A Study on the Design Concepts and Main Construction Processes of the Coal Shed at Thermal Power Plant (화력발전소 석탄저장고 설계개념과 시공과정 상의 주요 공정에 관한 연구)

  • Kim, Si-Hyun;Choi, Jang-Soon
    • Journal of the Korea Academia-Industrial cooperation Society
    • /
    • v.16 no.5
    • /
    • pp.3619-3626
    • /
    • 2015
  • The coal shed at thermal power plant(T.P.P) is the biggest building on size among nuclear, coal and other power plant industry buildings. This the coal shed of indoor type is mass volume, the size of 6 soccer fields and 73 meter in height. Structural and functional elements take priority over aesthetic factors. The shed is built to make mighty space for structural safety and functional store by using the concrete, $75,000m^3$ on the total of central retaining wall and sub buttress, and the steel frame used by 11,744-ton P.E.B. system. The design requirement on its wall and frame, P.E.B. system's feature, and specific data of main process followed by construction are inquired. The aim of this study is to suggest the design requirement and guide for the indoor type of the coal shed.

Implementation of Portable Electric Bicycle System (PEB-System) (탈·부착이 가능한 전기 자전거 시스템의 설계)

  • Shin, Yoon-gu;Do, Tae-hoon;Kwan, Yee-Jun;Kim, Jung Tae
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
    • /
    • 2015.10a
    • /
    • pp.536-538
    • /
    • 2015
  • 전기 에너지가 우리 생활에 유용하게 사용되는 부분이 정말 많다. 최근에는 자전거 열풍이 불면서 덩달아 전동 자전거 업계에도 호황이 일고 있는데, 21C 기후 변화와 환경오염, 교통체증 등의 문제해결을 위한 저탄소 녹색성장의 인식 전환으로 전동 자전거 이용이 늘어나고 있다. 이는 전동 자전거도 전기 에너지가 사용되고 있다 점이다. 하지만 이런 장점을 가지고 있는 전동 자전거를 많은 사람들이 구입하지 못하는 이유가 있다. 대부분의 이유가 '집에 자전거 1대씩 가지고 있는데, 굳이 비싼 돈을 주고 전동 자전거를 구입해야하나?' 라는 생각을 가지게 된다. 또 다른 이유로는 기존의 전동 자전거가 탈 부착 형식이 아닌 일체형으로 나오기 때문에 다른 신제품의 전동 자전거가 나온다면 기존의 전동 자전거의 부품을 사용하지 못 하고 새로운 자전거를 사야 한다는 단점 때문이다. 따라서 본 논문에서는 탈 부착이 가능한 전기 자전거 시스템을 구현하고자 한다.

  • PDF

Study on 40 nm Electron Beam Patterning by Optimization of Digitizing Method and Post Exposure Bake (전자선 석판 기술에서 디지타이징과 노광후굽기 최적화를 통한 40 nm 급 패턴 제작에 관한 연구)

  • Han, Sang-Yeon;Shin, Hyung-Cheol;Lee, Kwy-Ro
    • Journal of the Korean Institute of Telematics and Electronics D
    • /
    • v.36D no.10
    • /
    • pp.23-30
    • /
    • 1999
  • We experimented on the sub 50nm patterning using E-beam lithography system. SAL601 negative E-beam resist was used for this experiment. In order to utilize the maximum ability of E-beam system, firstly, we reduced the PR thickness to 100nm, and the field size to 200 ${um}m$. Then PEB (Post Expose Bake) time/temperature, which is one of the very important factors when SAL601 is used, were reduced for minimum line width. In addition, digitizing is optimized for better results. Quantum wire and quantum dot which can be used for nanoscale memory device, such as single electron memory device, are fabricated using these developed lithography techniques.

  • PDF

Structural Performance Evaluation of End-plate Connections According to Constructional Quality in P.E.B System (P.E.B 시스템에서 시공상태에 따른 엔드플레이트 접합부의 구조성능평가)

  • Lee, Eun-Taik
    • Journal of Korean Society of Steel Construction
    • /
    • v.24 no.4
    • /
    • pp.461-468
    • /
    • 2012
  • P.E.B (Pre-Engineering Building) system means an economical system, which designs and uses optimal section proportion of tapered members according to the magnitude of bending moment. However, it is hard to adjust the friction type bolted joint in the joint of tapered member in the P.E.B system. End-plate connection is mainly used in this system due to that difficulty. Because P.E.B system has end-plate vertical defacts by heat welding deformation, a gap between end-plates and rafter or rib can be observed. In this study, an examination of construction stability was throughly performed and analyzed by the investigation of permissible internal force of bolts in end-plate connections under the bending moment using the end-plate's initial connection-defect (gap).

Evaluation of Buckling Load and Specified Compression Strength of Welded Built-up H-section Compression Members with Residual Stresses (잔류응력의 영향을 고려한 조립 H-형강 부재의 좌굴하중 및 설계압축강도 평가)

  • Lee, Soo-Keuon;Yang, Jae-Guen;Kang, Ji-Seok
    • Journal of Korean Society of Steel Construction
    • /
    • v.29 no.1
    • /
    • pp.81-88
    • /
    • 2017
  • Residual stress is defined as stress that already exists on a structural member from the effects of welding and plastic deformation before the application of loading. Due to such residual stress, welded H-section compression members under centroidal compression load can undergo buckling and failure for strength values smaller than the predicted buckling load and specified compressive strength. Therefore, this study was carried out to evaluate the effect of residual stress from welding on the determination of the buckling load and specified compressive strength of the H-section compression member according to the column length variation. A three-dimensional nonlinear finite element analysis was performed for the H-section compression member where the welded joint was fillet welded by applying heat inputs of 3.1kJ/mm and 3.6kJ/mm using the SAW welding method.

Analytical and Experimental Study of an Unstiffened Extended End-Plate Connection (반복하중을 받는 비보강 확장 단부판 접합부의 해석 및 실험적 연구)

  • Kim, Hee Dong;Yang, Jae Guen;Pae, Da Sol
    • Journal of Korean Society of Steel Construction
    • /
    • v.28 no.6
    • /
    • pp.439-448
    • /
    • 2016
  • Extended end-plate connections(EEPC) are a type of connection applied in Pre-Engineered Building structures comprising beam-column connections of steel structures or tapered members. Extended end-plate connections(EEPC) show different behavioral characteristics owing to the influence of plate thickness, gauge distance of high strength bolt, diameter of high strength bolt frame, and the number of high strength bolts. In the USA and Europe, extended end-plate connections(EEPC) are applied in beam-column connections of steel structures in various forms; however, these are not widely applied in structures in Korea.This can be attributed to the fact that the proposal of design strength types for extended end-plate connections(EEPC), proposal of connection specifications, evaluation of seismic performance, and are not being performed appropriately. Therefore, the purpose of this study is to provide basic data for the domestic application of Unstiffened extended endplate connections. To realize this, nonlinear finite element analysis was conducted on a 12-mm thick Unstiffened extended endplate connections.