• Title, Summary, Keyword: Slim Floor

Search Result 28, Processing Time 0.029 seconds

Comparing floor height reduction effect of slim floor system with square steel pipe (각형강관을 이용한 슬림플로어 시스템의 층고절감효과 비교)

  • Cho, Youn-Jin;Rhim, Hong-Chul;Kim, Dae-You;Lyu, Seung-Il;Kim, Do-Kyun
    • Proceedings of the Korean Institute of Building Construction Conference
    • /
    • /
    • pp.56-57
    • /
    • 2017
  • In recent years, new construction methods have been required to reduce the construction cost and increase the available area in an environment where construction work is frequently performed in a narrow urban area like Korea. As a result of these studies, slim floor composite beam has been suggested. Slim floor composite beam can reduce required depth because web of steel beam is embedded in the slab, so it is effective to reduce floor height and increase the available area. The purpose of this study is the floor height reduction evaluation by comparing system consisting of reinforced concrete, steel, and slim floor using square-shape steel pipe. After doing structural design for a typical plan, checked effectiveness by comparing each design plan. It is proven that slim floor composite beam can reduce required depth effectively comparing required materials of other system.

  • PDF

Seismic-resistant slim-floor beam-to-column joints: experimental and numerical investigations

  • Don, Rafaela;Ciutina, Adrian;Vulcu, Cristian;Stratan, Aurel
    • Steel and Composite Structures
    • /
    • v.37 no.3
    • /
    • pp.307-321
    • /
    • 2020
  • The slim-floor solution provides an efficient alternative to the classic slab-over-beam configuration due to architectural and structural benefits. Two deficiencies can be identified in the current state-of-art: (i) the technique is limited to nonseismic applications and (ii) the lack of information on moment-resisting slim-floor beam-to-column joints. In the seismic design of framed structures, continuous beam-to-column joints are required for plastic hinges to form at the ends of the beams. The present paper proposes a slim-floor technical solution capable of expanding the current application of slim-floor joints to seismic-resistant composite construction. The proposed solution relies on a moment-resisting connection with a thick end-plate and large-diameter bolts, which are used to fulfill the required strength and stiffness characteristics of continuous connections, while maintaining a reduced height of the configuration. Considering the proposed novel solution and the variety of parameters that could affect the behavior of the joint, experimental and numerical validations are compulsory. Consequently, the current paper presents the experimental and numerical investigation of two slim-floor beam-to-column joint assemblies. The results are discussed in terms of moment-rotation curves, available rotational capacity and failure modes. The study focuses on developing reliable slim-floor beam joints that are applicable to steel building frame structures located in seismic regions.

Serviceability Evaluation of Slim Composite Floor System (슬림 합성보 바닥시스템의 사용성 평가)

  • Eun, Hee-Chang
    • KIEAE Journal
    • /
    • v.8 no.6
    • /
    • pp.63-70
    • /
    • 2008
  • Slim floor construction is becoming used throughout many countries. It combines the advantages of flat slab construction with significant inherent resistance to fire. The slim floor system with web openings leads to the reduction of its self-weight. Although the system has enough strength and stiffness, it is necessary to evaluate and improve the effects of dynamic vibration to be able to annoy the residents. Thus, this study evaluates the serviceability of vibration effects based on the dynamic test of five slim composite beams. Based on the experimental results, the initial stiffness and natural frequency of all specimens exhibit the similar trend regardless of the opening and the shape of cross section. The decrease in natural frequency is deeply related to the reduction in the stiffness of specimens and thus, it can be concluded that the damage of slim composite floor can be detected by the measurement of natural frequency instead of the load-carrying capacity and the stiffness.

Flexural Performance Evaluation of Semi-slim floor Composite Beams for Reduction of Story Height (층고절감을 위한 반슬림플로어 합성보의 휨성능 평가)

  • Lee, E.T.;Lee, Sang Hoon;Jang, Bo Ra
    • Journal of Korean Society of Steel Construction
    • /
    • v.20 no.1
    • /
    • pp.165-173
    • /
    • 2008
  • In order to promote the practicality of high-rise steel buildings, the development of structural system which have the better fire resistance, the changeable plan, and the quality control of construction with general composite beams is needed. In this research, new semi-slim floor which the defect of general slim floor was complemented was evaluated to investigate the concrete integration with slim-flor beam and the flexural performance. 5 simply supported semi-slim floor beam tests were performed with parameters; structural form of slab support beam, slab thickness, with or without web opening, and shear connection. Experimental results showed that all specimen s had good ductile behavior.

Strength Measurements of Slim Floor Composite Beams used Perforated Square Shape Steel Pipe (천공된 각형강관을 이용한 슬림플로어 합성보의 내력실험)

  • Kim, Dong-Yeon;Rhim, Hong-Chul;Park, Sung-Woon;Kim, Do-Kyun;Lyum, Seung-Il;Park, Dae-Won
    • Proceedings of the Korean Institute of Building Construction Conference
    • /
    • /
    • pp.189-190
    • /
    • 2015
  • Slim Floor construction method has to increase the available surface area thereby reducing the depth beams and slab. In addition, In this study compostie beam assembly of plates, square-shape steel pipe and deck plate. So workabiltiy is superior to the upper concrete possible without formwork. In the present study is strength test in progress in development slim floor composite beam used plate and perforated square shape steel pipe and obtained anlysis and conclustion of the experimental results.

  • PDF

Flexural Capacity of the Encased(Slim Floor) Composite Beam with Deep Deck Plate (매입형(슬림플로어) 합성보의 휨성능 평가 -춤이 깊은 데크플레이트와 비대칭 H형강 철골보-)

  • Heo, Byung Wook;Bae, Kyu Woong;Moon, Tae Sup
    • Journal of Korean Society of Steel Construction
    • /
    • v.16 no.2
    • /
    • pp.235-245
    • /
    • 2004
  • The advantages of composite construction are now well understood in terms of structural economy, good performance in service, and ease of construction. However, these conventional composite construction systems have some problems in application to steel framed buildings due to their large depth. So, in this study we executed an experimental test with the "Slim Floor"system which could reduce the overall depth of composite beam. Slim Floor system is a method of steel frame multi-story building construction in which the structural depth of each floor is minimized by incorporating the steel floor beams within the depth of the concrete floor slab. Presented herein is an experimental study that focuses on the flexural behaviour of the partially connected slim floor system with asymmetric steel beams encased in composite concrete slabs. Eight full-scale specimens were constructed and tested in this study with different steel beam height, slab width, with or without shear connection and concrete topping thickness. Observations from experiments indicated that the degree of shear connection without additional shear connection was $0.53{\sim}0.95$ times that of the full shear connection due to inherent mechnical and chemical bond stress.

Large scale fire test on a composite slim-floor system

  • Bailey, C.G.
    • Steel and Composite Structures
    • /
    • v.3 no.3
    • /
    • pp.153-168
    • /
    • 2003
  • This paper discusses the results and observations from a large-scale fire test conducted on a slim floor system, comprising asymmetric beams, rectangular hollow section beams and a composite floor slab. The structure was subjected to a fire where the fire load (combustible material) was higher that that found in typical office buildings and the ventilation area was artificially controlled during the test. Although the fire behaviour was not realistic it was designed to follow as closely as possible the time-temperature response used in standard fire tests, which are used to assess individual structural members and forms the bases of current fire design methods. The presented test results are limited, due to the malfunction of the instrumentation measuring the atmosphere and member temperatures. The lack of test data hinders the presentation of definitive conclusions. However, the available data, together with observations from the test, provides for the first time a useful insight into the behaviour of the slim floor system in its entirety. Analysis of the test results show that the behaviour of the beam-to-column connections had a significant impact on the overall structural response of the system, particularly when the end-plate of one of the connections fractured, during the fire.

An Experimental Study on the Development of Semi-Slim Composite Beam with Traperzodial Composite Deck Plate (골형 합성 테크플레이트를 사용한 반슬림 합성보의 개발에 관한 실험적 연구)

  • Bae, Kyu-Woong;Oh, Sang-Hoon;Heo, Byung-Wook;Yang, Myung-Sook
    • Journal of Korean Society of Steel Construction
    • /
    • v.13 no.1
    • /
    • pp.29-40
    • /
    • 2001
  • Steel frames are increasingly used in commercial buildings. and most steel frames are designed to achieve composite action with the concrete floor slab. The advantages of 'composite construction' are now well understood in terms of structural economy. good performance in service. and ease of construction. But. these conventional composite construction system are difficult to apply steel framed apartment due to their large depth. So. in this study we developed Semi Slim Floor system which could reduce the overall depth of composite beam. Semi Slim Floor system is a method of steel frame multi-story building construction in which the structural depth of each floor is minimised by incorporating the steel floor beams within the depth of the concrete floor slab. Twelve composite slab specimens with different deck-type. slab width. with or without stud bault and concrete topping thickness were tested to evaluate the flexural capacity.

  • PDF

Flexural Capacity of Encased Composite Beam with Hollow Core PC Slabs (매입형 합성보의 휨 성능 평가 -속 빈 프리캐스트 콘크리트 슬래브와 비대칭 H형강 철골보-)

  • Heo, Byung Wook;Bae, Kyu Woong;Moon, Tae Sup
    • Journal of Korean Society of Steel Construction
    • /
    • v.16 no.5
    • /
    • pp.587-598
    • /
    • 2004
  • In this study, an experiment was conducted on the Slim Floor system, using a hollow core PC slab, which could reduce the over-all depth of a composite beam. The Slim Floor system is a method used in steel frame multi-story building construction, in which the structural depth of each floor is minimized after incorporating the steel floor beams within the depth of the concrete floor slab. This experimental study focused on the flexural behavior of the partially connected Slim Floor system with asymmetric steel beams encased in hollow core PC slabs. Ten full-scale specimens were constructed and tested in this study, with different steel beam heights, hollow core PC slabs, slab widths, and PC slab bearings. Observations made in line with the experiments indicated that the degree of shear connection without additional shear connection was 0.48-0.98 times more than that of the full shear connection, due to inherent mechanical and chemical bond stress.

Simple equations for the calculation of the temperature within the cross-section of slim floor beams under ISO Fire

  • Zaharia, R.;Franssen, J.M.
    • Steel and Composite Structures
    • /
    • v.13 no.2
    • /
    • pp.171-185
    • /
    • 2012
  • The calculation of fire resistance for a composite structural element comprises the calculation of the temperature within its cross-section and of the load bearing capacity, considering the evolution of the steel and concrete mechanical properties, function of the temperature. The paper proposes a method to calculate the bending capacity under ISO fire, for Slim Floor systems using asymmetric steel beams, with a wider lower flange or a narrow upper flange welded onto a half hot-rolled profile. The temperatures in the cross-section are evaluated by means of empirical formulas determined through a parametrical analysis, performed with the special purpose non-linear finite element program SAFIR. Considering these formulas, the bending capacity may be calculated, using an analytical approach to determine the plastic bending moment, for different fire resistance demands. The results obtained with this simplified method are validated through numerical analysis.