• 제목/요약/키워드: Steel truss

검색결과 401건 처리시간 0.025초

파이프 트러스 빔을 이용한 경량방음터널의 설계적합성 평가 (Evaluation of Design Compatibility for Lightweight Soundproof Tunnels using Pipe Truss Beams)

  • 안동욱;최성준;노명현
    • 복합신소재구조학회 논문집
    • /
    • 제7권1호
    • /
    • pp.9-18
    • /
    • 2016
  • In this paper, the structural characteristics of a lightweight soundproof tunnel to reduce the dead load imposed on the bridge are investigated. Subsequently, the design procedure of soundproof tunnel structures is reviewed and a design practice for the lightweight soundproof tunnel is carried out according to the reviewed procedure. Next, design compatibility for the lightweight soundproof tunnel is verified through a detailed finite element analysis. The result for evaluation of design compatibility shows that the lightweight soundproof tunnel has structural safety in structural members, welding zones and foundation parts. It is also confirmed that serviceability and buckling safety is excellent.

석재 외피 시공을 위한 알루미늄 빔 지지공법 연구 (A study on the Aluminium Beam Methods for Building a Stone Finished Envelope)

  • 김장욱;이영래;홍성욱;도선붕;이한승
    • 한국건축시공학회:학술대회논문집
    • /
    • 한국건축시공학회 2012년도 춘계 학술논문 발표대회
    • /
    • pp.235-242
    • /
    • 2012
  • In recently constructed building, It has become fashionable again that the heavy external skin system such as a Stone Finished Envelope. There are Squared Steel Pipe Methods, C-Shaped Steel Pipe Methods, and Aluminum Beam Methods in the structure of a heavy external skin system. The Aluminum Beam Methods is often misunderstood as a Plane Truss Structure, but this method is not appropriate to be called to a truss structure but a beam methods. The Aluminum Beam Methods is the most Eco-friendly methods in terms of Quality assurance, Efficiency, Safety, Construction period, Durability, and Recyclability. And this Methods is also very appropriate in considering the point of Energy conservation, Waste reduction, Long-life architecture, Replacement parts, Environmental protection, Public efficiency, and Building demolition.

  • PDF

단면 수정계수를 이용한 이동 하중에 따른 트러스 연결부의 응력해석 (Stress Analysis of Truss Connection subjected to Moving Load Using Section Properties Factor)

  • 이상호;배기훈
    • 한국전산구조공학회:학술대회논문집
    • /
    • 한국전산구조공학회 2002년도 가을 학술발표회 논문집
    • /
    • pp.354-361
    • /
    • 2002
  • This paper propose section properties factor to generate stress history for fatigue analysis and safety inspection of steel bridge. A methodology is described for the computation of numerical stress histories in the steel truss bridge, caused by the vehicles using section properties factor. The global 3-D beam model of bridge is combined with the local shell model of selected details. Joint geometry is introduced by the local shell model. The global beam model takes the effects of joint rigidity and interaction of structural elements into account. Connection nodes in the global beam model correspond to the end cross-section centroids of the local shell model. Their displacements are interpreted as imposed deformations on the local shell model. The load cases fur the global model simulate the vertical unit force along the stringers. The load cases fer the local model are imposed unit deformations. Combining these, and applying vehicle loads, numerical stress histories are obtained. The method is illustrated by test load results of an existing bridge.

  • PDF

철근트러스 압접 데크플레이트 바닥 구조의 설계 프로그램 (Design Program of Deck Plate Slab System with Non-welding Truss Type Reinforced Bar)

  • 윤명호;오상훈
    • 한국디지털건축인테리어학회논문집
    • /
    • 제8권1호
    • /
    • pp.57-64
    • /
    • 2008
  • There are many problems in present truss-deck slab system for example welding defect, segregation, water leakage, rust and tarnish etc. These problems may be caused by spot welding thin galvanized steel plate and lattice bar. The TOX Joining Systems is to join metal sheets of different material and thickness with and without coating or painting without adding heat or a joining part. Newly developed TOX-deck slab system using non-welding joint is free from above mentioned problems. The objects of this study are suggestion of design strength of TOX joint by experimental and statistical analyses and development of window based program to design the TOX-deck slab system.

  • PDF

강 트러스교 확장공사시 시공중 계측 (Construction Monitoring for Steel Truss Bridge Widening Works)

  • 이창수;장정환;이장석;김남홍
    • 한국구조물진단유지관리공학회 논문집
    • /
    • 제9권2호
    • /
    • pp.103-112
    • /
    • 2005
  • 본 연구에서는 과거 붕괴사고로 인해 큰 사회적 이슈가 되었고 현재 확장공사가 진행 중인 성수대교를 대상 구조물로 하여 시공중 계측을 통한 각 시공단계별 안정성을 확인하였다. 그 결과, 앵커리지 트러스와 서스펜디드 트러스 가설단계별로 측정된 계측값은 구조해석값의 60~110%이고, 선하중 재하에 의해 부재에 발생하는 응력이 해석값과 유사하게 나타났으므로 각각의 부재는 충분한 강성을 가지고 있고 시공 상태도 양호한 것으로 판단되었다. 기존부와 확장부 간의 일체화 여부를 파악하기 위하여 실시한 진동변위 측정 결과, 기존부와 확장부는 횡방향 부재 및 스웨이 브레이싱의 볼트체결로 인해 일체화 된 것으로 확인되었다.

대공간 목구조 건축의 건립 현황과 구조시스템 특성 분석 (A Study on the Construction Status and the Structural System Features of Wooden Large Space Buildings)

  • 이주나;이형훈;이승재
    • 한국공간구조학회논문집
    • /
    • 제22권3호
    • /
    • pp.15-24
    • /
    • 2022
  • In this research, the case of modern wooden structures since 1950 with span of 30m or more was investigated and analyzed the construction status and structural planning characteristics of wooden large space architecture. As a result, wooden large space buildings have built around Asia, North America, and Europe, in which cases of ice skating stadiums with span of 30m to 60m were concentrated. In the case of baseball parks and football stadiums, even a span of about 165m was built in a wooden structure. In addition, it was found that the structural systems used in wooden large space structures were a funicular arch and truss structure, in that cases, funicular arch system consisting of radial arrangements was used in the examples exceeded 150m and the two way truss system was also used in long span wooden structures exceeding 100m. As the truss structure with a tie-rod or the flexure+tension structure was partially investigated, it can be seen that various timber structural systems need to be devised and researched. Also, It was investigated that a technique in which some members of the truss are made of steel or a composite member of steel and timber is also possible to develop

Multi-stage approach for structural damage identification using particle swarm optimization

  • Tang, H.;Zhang, W.;Xie, L.;Xue, S.
    • Smart Structures and Systems
    • /
    • 제11권1호
    • /
    • pp.69-86
    • /
    • 2013
  • An efficient methodology using static test data and changes in natural frequencies is proposed to identify the damages in structural systems. The methodology consists of two main stages. In the first stage, the Damage Signal Match (DSM) technique is employed to quickly identify the most potentially damaged elements so as to reduce the number of the solution space (solution parameters). In the second stage, a particle swarm optimization (PSO) approach is presented to accurately determine the actual damage extents using the first stage results. One numerical case study by using a planar truss and one experimental case study by using a full-scale steel truss structure are used to verify the proposed hybrid method. The identification results show that the proposed methodology can identify the location and severity of damage with a reasonable level of accuracy, even when practical considerations limit the number of measurements to only a few for a complex structure.

Design and optimization of steel trusses using genetic algorithms, parallel computing, and human-computer interaction

  • Agarwal, Pranab;Raich, Anne M.
    • Structural Engineering and Mechanics
    • /
    • 제23권4호
    • /
    • pp.325-337
    • /
    • 2006
  • A hybrid structural design and optimization methodology that combines the strengths of genetic algorithms, local search techniques, and parallel computing is developed to evolve optimal truss systems in this research effort. The primary objective that is met in evolving near-optimal or optimal structural systems using this approach is the capability of satisfying user-defined design criteria while minimizing the computational time required. The application of genetic algorithms to the design and optimization of truss systems supports conceptual design by facilitating the exploration of new design alternatives. In addition, final shape optimization of the evolved designs is supported through the refinement of member sizes using local search techniques for further improvement. The use of the hybrid approach, therefore, enhances the overall process of structural design. Parallel computing is implemented to reduce the total computation time required to obtain near-optimal designs. The support of human-computer interaction during layout optimization and local optimization is also discussed since it assists in evolving optimal truss systems that better satisfy a user's design requirements and design preferences.

Chord bearing capacity in long-span tubular trusses

  • Kozy, B.;Boyle, R.;Earls, C.J.
    • Steel and Composite Structures
    • /
    • 제6권2호
    • /
    • pp.103-122
    • /
    • 2006
  • The capacity of tubular truss chords subjected to concentrated reaction forces in the vicinity of the open end (i.e., the bearing region) is not directly treated by existing design specifications; although capacity equations are promulgated for related tubular joint configurations. The lack of direct treatment of bearing capacity in existing design specifications seems to represent an unsatisfactory situation given the fact that connections very often control the design of long-span tubular structures comprised of members with slender cross-sections. The case of the simple-span overhead highway sign truss is studied, in which the bearing reaction is applied near the chord end. The present research is aimed at assessing the validity of adapting existing specifications' capacity equations from related cases so as to be applicable in determining design capacity in tubular truss bearing regions. These modified capacity equations are subsequently used in comparisons with full-scale experimental results obtained from testing carried out at the University of Pittsburgh.