초록 ▼

최근 건축물이 대형화·고층화 되어감에 따라 장경간 실현과 층고절감을 동시에 만족할 수 있는 구조시스템에 대한 수요가 증대되고 있다. 이러한 동향에 따라 국내·외에서 새로운 합성구조 시스템에 대한 연구가 활발히 진행되고 있지만 대부분의 기존 시스템은 내화성능을 확보하기 위하여 추가적인 내화보강이 필요하다. 따라서 이 연구에서는 합성보의 충분한 강성 및 강도 확보와 함께 상·고온 조건에서 능동적 처짐제어를 할 수 있는 ‘프리스트레스가 도입된 파형웨브 합성보(이하 PS파형웨브 합성보)’를 개발하였다.개발된 합성보의 상온 및 화재성능 평가

최근 건축물이 대형화·고층화 되어감에 따라 장경간 실현과 층고절감을 동시에 만족할 수 있는 구조시스템에 대한 수요가 증대되고 있다. 이러한 동향에 따라 국내·외에서 새로운 합성구조 시스템에 대한 연구가 활발히 진행되고 있지만 대부분의 기존 시스템은 내화성능을 확보하기 위하여 추가적인 내화보강이 필요하다. 따라서 이 연구에서는 합성보의 충분한 강성 및 강도 확보와 함께 상·고온 조건에서 능동적 처짐제어를 할 수 있는 ‘프리스트레스가 도입된 파형웨브 합성보(이하 PS파형웨브 합성보)’를 개발하였다.개발된 합성보의 상온 및 화재성능 평가를 위하여 실물실험과 해석적 연구를 병행하였다. 이 연구를 통하여 국내 최초로 7.5 m 경간을 갖는 무피복 합성보의 3 시간 내화성능을 확보하는 데에 성공하였으며, PS파형웨브 합성보에 적용할 수 있는 다양한 형태의 보-기둥 접합부 상세설계방안과 접합부 형태에 따르는 내화보강 방안을 제시함으로써 PS파형웨브 합성보의 실용화기술을 확보하였다.

Abstract ▼

Ⅳ. Final Results and Applications
Year 1
Key Study Content
▪ Full scale fire tests [7.5M]
- Targets: convnetional composite beams, asymmetric slim-floor beams, CWPS composite beams
Study Results
▪ Realistic evaluations of fire behavior of various composite beam systems
Key Stu

Ⅳ. Final Results and Applications
Year 1
Key Study Content
▪ Full scale fire tests [7.5M]
- Targets: convnetional composite beams, asymmetric slim-floor beams, CWPS composite beams
Study Results
▪ Realistic evaluations of fire behavior of various composite beam systems
Key Study Content
▪ Verification of fire-resisting performance enhancements of various slim-floor beams due to prestress
Study Results
▪ Fire resistance performance improvement method 1: improving fire resistance performance by increasing beam size
▪ Fire resistance performance improvement method 2: improving fire resistance performance by application of fire protection to lower flange of steel beam
Key Study Content
▪ Review on constructability of CWPS composite beam system and structural performance of its beam-column connections
Study Results
▪ Improving horizontal shear resistance capacity by providing the shear connectors
▪ Developing bi-directional prestressing device to improve constructability
Key Study Content
▪ Review on construction detail for field applications of CWPS composite beam system
Study Results
▪ Parametric analysis study considering various tendon profiles
Key Study Content
▪ Development of continuous construction method and connection details for practical applications of CWPS composite beam system
Study Results
▪ Review of various types of beam-column connection methods considering actual conditions in construction fields
Key Study Content
▪ Review of actual fabrications of CWPS composite beam[ Providing solutions for difficulties of field applications ]
Study Results
▪ Simplifying shape of corrugated webs for application of automated welding equipment
Key Study Content
▪ Actual field and design application of developed CWPS
Study Results
▪ Review of actual field and design application of CWPS composite beam system
Key Study Content
composite beam system
Study Results
▪ Deriving advantages and disadvantages of developed CWPS composite beam system
Year 2
Key Study Content
▪ Development of fire resistance performance with no fire protection [ target: 120 min. ]
Study Results
▪ Fire testing for CWPS composite beams
- 138 min. fire resistance performance was obtained from tests(Year 2 objective: 120 min)
▪ Application for green technology certification was completed
Key Study Content
▪ Evaluation of effect of hollow area inside of CWPS composite members to their structural performances at room temperature, and investigating fire performance due to different heat transfer mechanism during fire
Study Results
▪ Conducting comparisons in room temperature performance through loading tests on CWPS composite members with and without hollow web section
Key Study Content
▪ Development and verification of nonlinear finite element analysis model
Study Results
▪ Development of nonlinear finite element analysis model considering the construction stages
▪ Structural performance analysis of CWPS composite beams through numerical analysis
Key Study Content
▪ Development of design and construction manual for field application of CWPS composite beams
Study Results
▪ Development of design and construction manual for design and fabrications of CWPS composite beam and its beam-column connections
Key Study Content
▪ Filed application of developed CWPS composite beam system
Study Results
▪ Development of standard connection details considering constructability
Study Results
▪ Field application of CWPS composite members is completed
Year 3
Key Study Content
▪ Development of fire resistance performance with no fire
Study Results
▪ Fire testing for CWPS composite beams
- 210 min. fire resistance performance was obtained from tests(Year 3 objective: 180 min)
Key Study Content
protection [target: 120 min.][target: 180 min.]
Study Results
▪ Green technology is certificated
Key Study Content
▪ Preparing alternative fire protection method for beam-column connection of CWPS composite system
Study Results
▪ Proper fire protection method for beam-column connection region was prepared to satisfy required fire-resisting performance.
- Fire protection method for Gerber-type beam-column connection
Key Study Content
▪Field application of developed CWPS composite beam system
Study Results
Test specimens to get the official certification of fire resistance from National Fire Protection Structure have been prepared, which will be very useful for actual filed application.