최적이론에 의하여 설계된 최소 깊이 더블티 슬래브의 휨거동 평가

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유승룡;김대훈;유재천

  • 발행 : 1999.06.01

초록

Precast prestressed double-tee slab may be designed by the PCI Design Handbook. It is based on the bridge construction and is required for reorganization for the use of buildings in the domestic construction environments. Much enhanced sections are developed from the reforming process on the determined design factors in the previous experimental works on double tees. Pre-determined shape, reinforcement detail, and 5000 psi concrete strength can not be expected as the best solution for the domestic construction requirements because large amount of use on that systems are anticipated. Flexural tests are performed on four full-scale 12.5m proto-type models, "least depth double tee", which are resulted from the optimization process. Domestic superimposed live load regulation, domestic material properties which is available to product, building design requirements and economy in construction are considered as the main factors to establish. the first two sections are double tee section for 1.2 ton/$\m^2$ market live load with straight and one-point depressed strands and the second two are for 0.6 ton/$\m^2$ parking live load with those strand types. All of the specimens tested fully comply with the flexural strength requirements as specified by ACI 318-95. However, the research has shown that following improved considerations are needed for better result in practice. The locations and method of connection for the lowest bottom mild bar, connection method between precast and cast-in-place concrete, and dap-end reinforcement are need to be improved.

키워드

double-tee;slab;flexure;beam test;leath depth

참고문헌

  1. Building Code Requirements for Reinforced Concrete and Commentary(ACI 318-95) ACI 318-95
  2. 철근콘크리트 구조계산 규준 및 해설 대한건축학회
  3. (2rd.) Design of Prestressed Concrete Nilson, A. H.
  4. (3rd ed.) pp.646 Design of Prestressed Concrete Structures Lin, T. Y.;Burns, N. H.
  5. Journal of PCI v.60 no.6 pp.719-742 Load Balancing Method for Design and Analysis of Prestressed Concrete Structures Lin, T. Y.
  6. Journal of PCI v.30 no.2 pp.172-182 Generalized Flexure Design Equations for Prestressed Concrete Orbison, J. G.
  7. Journal of PCI v.14 no.1 pp.62-71 Flexure Design Equations for Concrete Members Nilson, A. H.
  8. (4th ed.) PCI Design Hand Book
  9. Journal of PCI v.22 no.3 pp.30-47 Crack and Deflection Control of Pretensioned Prestressed Beams Nawy, E. G.;Huang, P. T.