파형강판 볼트 이음부의 피로성능에 관한 실험적 연구
An Experimental Study on the Bolted Connection Fatigue Capacity of Corrugated Steel Plates
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초록
파형강판 구조물은 강판 세그먼트를 현장에서 볼트연결하고, 양질의 뒷채움 시공을 통해 시공성을 높일 수 있기 때문에 최근 생태통로,소규모 교량 및 관로 등에 폭넓게 시공되고 있다. 본 연구는 휨하중을 받는 볼트연결된 파형강판 세스먼트의 정적 및 피로거동을 실험적으로 분석하였다. 피로거동을 분석하기 위하여 볼트 직경, 와셔와 같은 연결부 상세를 실험변수로 하였으며, 실험에 사용된 실험체의 파형의제원은 400×150 mm이다. 정적실험 결과 모든 실험체의 실험 극한강도가 이론강도보다 높게 나타났으며, 강판의 지압 및 상부강판 볼트구멍의 찢김에 의해 파괴되었다. 6mm와 7mm 강판에 대하여 하중범위 209kN에서 517kN사이로 피로실험을 수행하였으며, 실험결과 정적파괴시의 강판지압과 찢김파괴에서 피로실험시에는 강판지압과 볼트 전단의 형태로 변화하였으며, 2백만회 피로한계는 대략 85MPa로 분석되었다.
Abstract
Corrugated steel plate structure, which is built by assembling corrugated steel plate segments with bolts on site and filling thesurroundings with quality soil, is widely used for buried structures as a eco-corridors, small bridges, and closed conduits. Thisexperimental study is dealt with the static and fatigue performance of bolt connected corrugated steel plates under flexural loading. The experimental variables to verify the fatigue performance are bolt diameters and detailing of connection such as washer and thecorrugation dimension of specimens has a 400×150 mm. The experimental ultimate strength of specimens under static loading washigher than the theoretical strength and all specimen failed by a bearing and tearing failure of bolt hole of upper plate. Therefore,a fatigue tests of specimens had 6.0mm and 7.0mm thickness was conducted in which the load range was up to 209kN and 516kN,respectively. From the fatigue test, failure patterns are changed from plate bearing and tearing which is a typical failure pattern ofstatic failure to a bearing failure of plate and shear failure of bolt, and experimental fatigue limit at 2×106cycles is about 85MPa.
참고문헌 (12)
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