1997 Fiscal Year Final Research Report Summary
Local Buckling and Collapse of FRP Structural Column
| Project/Area Number |
08650668
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Building structures/materials
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| Research Institution | TOYOHASHI UNIVERSITY OF TECHNOLOGY |
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Principal Investigator |
YAMADA Seishi TOYOHASHI UNIVERSITY OF TECHNOLOGY,Faculty of Engineering, Assoc.Professor, 工学部, 助教授 (50134028)
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| Co-Investigator(Kenkyū-buntansha) |
KANTO Yasuhiro TOYOHASHI UNIVERSITY OF TECHNOLOGY,Faculty of Engineering, Assoc.Professor, 工学部, 助教授 (60177764)
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| Project Period (FY) |
1996 – 1997
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| Keywords | Fiber Reinforced Plastic / Buckling / Collapse / Composite Materials / Axial Compression |
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| Research Abstract |
This study deals with the local buckling and the associated collapse behavior of commercially available, thin-walled box-shaped, pultruded fiber reinforced plastic (FRP) structural members. At first for revealing its fundamental elastic mechanical behavior, the author carried out various experiments ; tensile test for strip specimens cut off from the plate element of its structural member, bending test for the strip specimens and simple supported bending beam test. Second the effects of strand-mat on the local buckling load carrying capacity were investgated through stab column testing. Elastic general buckling behavior was then observed in long colums, and the ultimate stresses in this study are in good agreement with Euler's buckling criterion. At a large deflection equilibrium state, it experiences periodically wavy buckling dents at its compression flange and the sudden loss of its load carrying ability. In relatively short column s, the prebuckling deflection is small, but the plate elements still collapse suddenly at a critical load. In the box-shaped members, the detailed measurements suggested that the collapse begins in transverse failure on the corner due to elastic local buckling dent. The ultimate stresses are in agreement with the local buckling criterion obtained by using orthotropic thin-walled plate buckling theory. In the H-shaped members, however, it has been shown that the micro failure induces the plate elements to buckle and consequently the member collapses as a whole.
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