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工程力学  2014 

延性纤维混凝土剪力墙抗震性能试验研究

, PP. 170-177

Keywords: 延性纤维混凝土,剪力墙,抗震性能,延性,变形能力

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Abstract:

该文为改善高性能混凝土剪力墙的抗震性能,提出在剪力墙塑性铰区采用延性纤维混凝土(DFRC),设计了4片剪跨比为2.1的剪力墙试件,并进行了拟静力试验。通过改变DFRC区高度、轴压比和约束箍筋数量,研究其破坏机理、耗能能力及变形性能。结果表明:1)塑性铰区采用DFRC的剪力墙试件弹性阶段变长,剪力墙屈服后承载力降低缓慢;2)DFRC可有效控制剪力墙塑性铰区的弯剪斜裂缝的宽度,防止塑性铰区发生剪切破坏;3)DFRC区高度增大,剪力墙的变形和耗能能力明显提高,DFRC区约束箍筋数量增加,试件变形和耗能能力提高;4)塑性铰区采用DFRC的剪力墙试件,塑性铰区损伤程度明显降低,对减轻剪力墙的地震破坏程度具有重要作用。

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