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Title |
An Experimental Study on Flexural Behavior in Framed Structure of P.S.T Method
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Authors |
최걸 ; 윤종남 ; 엄기영 ; 홍성남 ; 박선규 |
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Keywords |
P.S.T 공법 ; 비개착공법 ; 휨거동 ; 프리스트레스트 콘크리트 ; P.S.T method ; Trenchless method ; Flexural behavior ; Prestressed concrete |
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Abstract |
The existing underground trenchless methods use reinforcing rod in steel tube to obtain structural stiffness. However, there are some problems such as inconvenience of work and expensive material fee which are resulted from limited working space and reinforcing work. To resolve these problems, a new trenchless method, namely P.S.T method (Prestressed Segment Tunnel Method), is developed which uses joint to connect the steel segment and form erection structure in underground construction. Further, installing strands for prestressing. In order to evaluate the flexural capacity of the P.S.T method structure, experiment was conducted. The parameters considered in the experiment are the span-to-depth ratio, diameter of steel tube at corner, prestressing force and welding of joint. Altogether examining the flexural behavior, the effect of deflection in structure according to different parameters has also been analysised.
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