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콘크리트 충전강관으로 보강된 철근콘크리트 기둥의 내진성능연구 원문보기

  • 저자

    이병한

  • 학위수여기관

    경상대학교 대학원

  • 학위구분

    국내석사

  • 학과

    건축공학과 건축구조

  • 지도교수

  • 발행년도

    2014

  • 총페이지

    xii,89 p.

  • 키워드

    콘크리트 충전강관 구조실험 구조해석 내진보강;

  • 언어

    kor

  • 원문 URL

    http://www.riss.kr/link?id=T13534411&outLink=K  

  • 초록

    The research presented in this paper is subject to RC frame that increases seismic capacity by attaching CFT(concrete-filled steel tubes) to reinforced concrete column The object of this study not only is to builds experimental database providing necessary information for retrofit column but also formulates modeling parameters of RC frame retrofitted by CFT through comparing analysis for analytical model predicting inelastic behavior of reinforced concrete members : column, joint, masonry wall, and retrofit column. For the attainment of this purposes, Six test specimens were made with test parameters of retrofit column: load direction, anchored rebar, and buttress. and then, Static test for column under lateral cyclic loading and constant axial load were conducted. Each of the test specimens are evaluated in term of strength, ductility, accumulated dissipation energy and equivalent damping ratio. Therefore, seismic capacity improvement for each of the specimens were verified except for standard column. Flexure behavior of retrofit column is predicted by fiber section analysis(opensees code). To consider the separation between steel tube end and basement, tensile strength of steel tube material is ignored. This assumption make fiber section analysis predict hysteretic curves of test specimens. In this thesis, Procedures studying analytical model of previous researchers predicting behavior of RC members of Existing structure is preceded before simulating RC frame retrofitted by CFT. Behavior of post-yielding shear failure RC columns can be simulated by using the solution of Elwood(2003). Estimation of analytical model is conduct by comparing analysis between hystertic curve of past experimental data(Lynn 2001) and pushover curve formulated by Elwood(2003) Solution. To configure material parameter for rotational spring of beam column hoint, Shear panel model(Lowes, Mitra, Altoontash 2004) and solution Proposed by Park SangJoon(2012) is utilized. Model proposed by Park SangJoon is slightly modified in term of initial stiffness through comparison of non-seismic beam column joint specimen(Woo 2003), joint failure specimen PEER4150(Alire 2002). Material properties for truss element of masonry wall are defined by modified equivalent diagonal strut model(Ko 201O). Finally, Modeling parameters of retrofitted RC frame are proposed. Pushover analysis is performed to verify the appropriacy of Modeling parameters. Opensees code is used to build analytical models of RC members.


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