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An Improved Test Method and Numerical Analysis for Crack Opening Resistance of FRC Round Determinate Panels

Wuhan University Journal of Natural Sciences 2009年第1期14卷 47-52页

作者： GU Qian XU Hanfeng MINDESS Sidney School of Civil Engineering and Architecture Wuhan University of Technology Wuhan 430070 Hubei China Department of Civil Engineering University of British Columbia Vancouver B.C. V6T 1Z4 Canada

This paper presents a numerical analysis of a material test program investigating the crack opening properties of fibre reinforced concrete （FRC） round determinate panels （RDP）. The objective of this research is to set up a modified RDP test method to improve the current ASTM C1550 test method for FRC and fibre reinforced shotcrete （FRS） composite. By this test method, light small-diameter panels are applied and more crack information can be obtained by a new rotation angle measuring technique. It is shown that this modified test method can be used to effectively evaluate the crack opening resistance of FRC. The finite element analysis was then performed to clarify the crack propaga- tions and failure mode of FRC RDP panels. It helps establish a reasonable theoretical method to predict the structural response of RDP. combining with this modified testing technioue.

关键词： fibre reinforced concrete test method round determinate panel finite element analysis crack opening

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Construction of a Butterfly Web Bridge

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Journal of Civil Engineering and Architecture 2014年第11期8卷 1453-1456页

作者： Kenichiro Ashizuka Kenji Miyamoto Kenichi Kata Akio Kasuga Kyushu Branch Office West Nippon Expressway Co. Ltd. Fukuoka 810-0001 Japan Civil Engineering Design Department Sumitomo Mitsui Construction Co. Ltd. Tokyo 104-0051 Japan

A new type of bridge called ＂butterfly web bridge＂ is under construction in Japan. In a butterfly web bridge, the butterfly-shaped web forms a structure that exhibits behavior similar to a double Warren truss. The 80 MPa concrete is used for the butterfly web which has a precast plate with a thickness of 150 mm. As butterfly web is a concrete material, reinforcement provided by prestressing tendons is needed on the tension side. Moreover, the 150 mm plate has no re-bars but is reinforced by steel fibers. This bridge, named Takubogawa Bridge, is a highway bridge and has 10 spans including the 87.5 m maximum span length. Takubogawa Bridge is constructed by flee cantilevering method. The butterfly web enables the construction speed of cantilevering to be advanced about 50% compared with conventional cast-in-situ method and can meet the requirement of light weight and low maintenance.

关键词： Precast plate fibre reinforced concrete construction speed low maintenance.

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