1999 Fiscal Year Final Research Report Summary
Model and Behavior of R/C Cantilever Walls with Openings
| Project/Area Number |
09650621
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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 | Niigata University |
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Principal Investigator |
DOI Mareyasu Niigata Univ, Department of Arch. Associate Professor, 工学部, 助教授 (60134954)
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| Co-Investigator(Kenkyū-buntansha) |
KATO Daisuke Niigata Univ, Department of Arch. Professor, 工学部, 教授 (90169508)
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| Project Period (FY) |
1997 – 1999
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| Keywords | Reinforced Concrete / Wall with Opening / Eccentric Opening / Cantilever Wall / Strength / Deformation Capacity |
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| Research Abstract |
The main objectives of this study were to examine the effects of wall openings on strength and deformation capacities of cantilever shear walls. Six reinforced concrete cantilever shear wall specimens with openings, which were designed to fail in flexure, were tested under static reversal load. Variables in the six specimens were peripheral ratios of the wall panel (0.3, 0.4 and 0.5), locations of the openings and the reinforcement of side walls beside the opening. Conclusions were as follows. (1) All six specimens, which were designed to fail in flexure, showed ductile behavior. (2) If the shear force can be resisted by a side wall in compression only (this s called type F wall), the flexural strength can be obtained by the yielding moment of the base. On the other hand, if the shear force can be resisted by both side walls (this is called type wall), the flexural strength must be reduce by the effects of the opening. Other walls are classified into Type S walls failing in shear. (3) If the wall is a type F wall, the deformation capacity can be obtained by the effectiveness factor of concrete with the proposed design equation for shear using a side wall in compression only. If the wall is a type FS wall, the deformation capacity can be obtained by the effectiveness factor of concrete using the summation of both side walls and this deformation capacity must be reduced by the effects of the opening. It must be noted that ductility design of the isolated column of type FS wall is required for axial force.
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