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Journal of the Korean Society of Hazard Mitigation 2003;3(1):123-132.
Published online March 31, 2003.
파형강관을 삽입한 중공원형단면 철근콘크리트 부재의 거동에 관한 연구
임정순, 김성칠, 조재병, 이수근
Behavior of Circular Hollow Section R.C Member with Internal Corrugated Steel Tube
Jung-Soon Im, Sung-Chil Kim, Jae-Byung Jo, Soo-Keun Lee
Abstract
An experiment was carried out to investigate the mechanical behaviour of the circular hollow section reinforced concrete member with internal corrugated steel tube. A specimen, 50cm in diameter and 340cm in length, was made and tested by 3 points bending. The test load was increased slowly (quasi static) to the failure or unacceptable deformation. During the test, lateral displacement at mid point and longitudinal displacement of extreme fiber on compressive and tensile side of the specimen were measured. The measured data were analysed and compared with calculated results for the equivalent member without inserted corrugated steel tube. The comparison shows that the flexural strength and ductility of hollow section reinforced concrete members can be improved by inserting corrugated steel tubes inside.
Key Words: circular hollow section; corrugated steel tube; 3 point bending test; flexural strength; ductility
요지
파형강관을 삽입하여 보강된 중공원형단면의 역학적 거동을 연구하기 위하여 직경 50cm, 길이 340cm의 시험체를 제작하였고, 3점 휨시험을 수행하였다. 하중재하는 파괴 또는 최대한변형이 발생할 때까지 느리게 증가시켰다. 시험하는 동안에 시험체 중앙의 휨방향 변위와 인장측과 압축측의 종방향 변위를 측정하였다. 측정데이타를 분석한 결과를 파형강관이 삽입되지 않은 등가단면에 대한 해석결과와 비교하였다. 비교결과, 중공 철근콘크리트 부재의 휨강성과 연성이 파형강관을 내부에 삽입함으로써 크게 향상시킬 수 있는 것으로 나타났다.
핵심용어: 중공원형단면; 파형강관; 3점휨시험; 휨강도; 연성


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