• Title/Summary/Keyword: steel structure

Search Result 475, Processing Time 0.157 seconds

Optimum Properties of Constrained Viscoelastic Layer Damper for Reduction of Floor Vibration in Steel Structure (바닥진동 저감을 위한 샌드위치형 점탄성 감쇠장치의 최적 물성치)

  • Kim, Si-Jun;Chun, Ho-Min;Lee, Seong-Soo
    • Journal of the Architectural Institute of Korea Structure & Construction
    • /
    • v.28 no.11
    • /
    • pp.63-70
    • /
    • 2012
  • A vibration increases as the steel structure floors are getting longer. As the vibration on the floor of the building is increasing, the complaint occurs frequently. This problem made us to find the way of reducing the vibration. To reduce the vibration, we can increase the structures size (depth and thickness). But the costs will go up and weight of structures will be increased. Therefore, we should be finding the method to increase the damping without increasing structures size. The sandwich type viscoelastic damping device can be applied to the floor of steel structure for reducing the vibration. This device has two advantages according to the cost and construction. Studies on viscoelastic material are existed, but we don't have enough study that predicts the vibration reduction effect. In this study, the optimum properties of viscoelastic sandwich damper is suggested using finite element analysis. Also the model analysis to study the optimum displacement of the viscoelastic sandwich damper is proposed.

Development of Integrated Model of Boiler and Its Supporting Steel Structure of Coal-Fired Power Plant for Finite Element Analysis (유한요소해석을 위한 석탄화력발전소의 보일러와 지지 철골의 통합모델 개발)

  • Lee, Boo-Youn
    • Journal of the Korea Academia-Industrial cooperation Society
    • /
    • v.21 no.4
    • /
    • pp.9-19
    • /
    • 2020
  • An integrated finite element model composed of a boiler and its supporting steel structure for a 375-MW coal-fired power plant was developed. This study used the developed model for seismic analysis using SAP2000 software. For the complex superheaters, reheaters, economizers, and membrane walls of the boiler, which consisted of numerous tubes, a method of modeling them by the equivalent elements in the viewpoint of stiffness and/or inertia was proposed. In addition, a method of modeling for the connection between the boiler and steel structure was proposed. Many hangers that connect the boiler to the girders of a steel structure were transformed into equivalent hangers by decreasing the number. The displacements of the boiler stoppers on the buckstay and the posts of the steel structure were coupled by considering their interface condition. Static analysis under the self-loading condition for the developed integrated model was implemented, and the results of deformation indicated that the behavior of the steel members and the major components of the boiler were appropriate. In conclusion, the integrated model developed in this study can be used to evaluate the safety of the boiler and steel structure under seismic loads.

A Study of Explosive Jet-cutting Technology by Linear Shape Charges (성형폭약에 의한 폭발절단기술에 관한 연구)

  • 이병일;박근순;공창식;김광태
    • Tunnel and Underground Space
    • /
    • v.10 no.4
    • /
    • pp.516-525
    • /
    • 2000
  • Recently, the demand for pollution-free demolition work of old reinforced concrete and steel structure has rapidly increased as the redevelopment of urban area has been accelerated. This study deals with linear shape charges for explosive jet cutting on steel structure. We have tested material and shape of steel structure, characteristics of thickness and strength, shape of linear shape charges, type of shape charges, cumulative charges, type of liner, stand-off distance, detonation method. effect of sound and vibration by air blast in explosive jet cutting method. So, We developed linear shape charges in order to take advantage of optimum explosive jet cutting condition. Shape charges were made of PETN explosives. We obtained the experimental formula to decide the amount of explosive needed for thickness of steel structure plate. There are prospects for application of the explosion curving technology under the open space conditions for dismantling the steel structure and steel bridge, scrapped old boats, which are going out of service.

  • PDF

Classification of Rail System in Steel Structure Stadiums by Case Study (사례분석에 의한 강구조 스타디움 레일 시스템 분류)

  • Kim, Hye-Seong;Yoon, Sung-Won
    • Journal of Korean Association for Spatial Structures
    • /
    • v.10 no.1
    • /
    • pp.67-74
    • /
    • 2010
  • This paper focuses on steel arrays regarding the application of PV system for solar power system, a renewable energy in steel structure stadium that will be built in Korea, by foreign case study. 20 cases of Steel Structure Stadiums applying PV system after 1990 were selected as the main subjects. The 20 cases of Steel Structure Stadiums were categorized by rail systems that were installed to fix PV module. As the result, linear clamping and roof-integrated type among cross rails were 28% of the whole, followed by 17% of rail-fixed type and 11% of module group-fixed type among vertical-fixed types. In addition, linear clamping and roof-integrated type among cross rails were applied in the inside of the stadium while the outside and other parts of stadiums used angle bracket to fix PV module.

  • PDF

A case study on the resource management of the steel structure construction project using RFID technology (RFID 기술을 이용한 철골공사 자재관리 사례분석 및 개선방안제시)

  • Park, Chang-Wook;Kwon, O-Cheol;Yun, Seok-Heon
    • Proceedings of the Korean Institute of Building Construction Conference
    • /
    • /
    • pp.93-96
    • /
    • 2007
  • Steel structure construction is the construction method which is plentifully used with reason of air shortening or the earthquake-proof efficiency improvement back. It is caused by with the feature which is a shop fabrication, it is more accurate than ferroconcrete construction when is a possibility of doing a materials supply and a crane work. From the research which it sees The instance analysis which uses the RFID it leads, A study is proposed an improvement plan of the RFID technology and an application plan of GPS.

  • PDF

An Experimental Study on the Bond Strength of the Metal Sprayed Coating According to the Shape and Size of the Attachment (어태치먼트의 형상 및 크기가 금속용사 방식피막의 부착강도에 미치는 영향에 관한 실험적 연구)

  • Park, Seungi-Gi;Park, Jin-Ho;Ryu, Hua-Sung;Lee, Han-Seung
    • Proceedings of the Korean Institute of Building Construction Conference
    • /
    • /
    • pp.109-110
    • /
    • 2016
  • The recent introduction of Metal spraying method apply to construction and civil steel structure is increasing. In applying the metal spraying lining process of construction and civil steel structure to secure the adhesion strength between the metal thermal spray coating and the steel structure and the highest priority requirements are required bond strength test reliable measurement accordingly. In this study, by calculating the deposition intensity and the standard deviation, coefficient of variation corresponding to the bonding area, unlike the shape of the attachment we compared the results.

  • PDF

Evaluating high performance steel tube-framed diagrid for high-rise buildings

  • Lee, Dongkyu;Ha, Taehyu;Jung, Miyoung;Kim, Jinho
    • Steel and Composite Structures
    • /
    • v.16 no.3
    • /
    • pp.289-303
    • /
    • 2014
  • In recent, development of construction and design technology gives taller, larger and heavier steel framed structures. With the tendency of increasing high-rise building, this study is strongly related to structural system, one of significant components in structural design. This study presents an innovative structural system, with high performance steel material, diagrid. Its detail, structural analysis, and structural experiments are all included for the development of new structures.

Nonlinear Seismic Analysis of Steel Structure Buildings Considering the Stiffnesses of the Foundation-Soil System (기초지반강성을 고려한 철골 건축구조물의 비선형 지진해석)

  • Oh, Young-Hee;Kim, Yong-Seok
    • Proceedings of the Earthquake Engineering Society of Korea Conference
    • /
    • /
    • pp.137-144
    • /
    • 2005
  • Seismic responses of a building are affected due to the site soil conditions. In this study, linear time history seismic analysis and nonlinear pushover static seismic analysis were performed to estimate the base shear forces of the 3, 5 and 7-story steel structure buildings considering the rigid and soft soil conditions. According to the study results, the steel structure buildings designed for the gravity loads and wind load showed the elastic responses with the moderate earthquake of 0.11g, and the soft soil layer increased the displacement and the base shear force of a building. Therefore it is more resonable to perform an elastic seismic analysis of a building structure with the moderate earthquakes considering the characteristics of the soft soil layer.

  • PDF

DEVELOP AND USE OF STUD PENETRATE WELDING TECHNOLOGY IN COMPOSITE FLOOR OF STEEL STRUCTURE

  • Fu, Jifei;Zhang, Youquan;Ma, Dezhi
    • Proceedings of the KWS Conference
    • /
    • /
    • pp.349-354
    • /
    • 2002
  • Stud penetrate welding is an important item of composite floor in modern steel structure, especially in high-rise buildings. But it is difficult to get satisfied welding quality due to all kinds of factors. In this paper, the author put forward a new welding procedure named method of energy control through analysis and comparison of the wave curves of stud welding based on large amount of experiments and tests in laboratory and construction areas. The use of this welding procedure in some large engineering in recent years proved that this method is effective and practicable

  • PDF