延性纤维混凝土剪力墙抗震性能试验研究邓明科.pdfVIP

第 31 卷第 7 期 Vol.31 No.7 工 程 力 学 2014 年 7 月 July 2014 ENGINEERING MECHANICS 170 1000-4750(2014)07-0170-08 1 1,2 1 1 邓明科 ，寇佳亮 ，梁兴文 ，秦 萌 (1. 西安建筑科技大学土木工程学院，西安 710055 ；2. 西安理工大学土木建筑工程学院，西安 710048) 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。 延性纤维混凝土；剪力墙；抗震性能；延性；变形能力 TU398.2 ；TU317.1 A doi: 10.6052/j.issn.1000-4750.2013.01.0099 EXPERIMENTAL INVESTIGATION ON ASEISMIC BEHAVIOR OF DUCTILE FIBER REINFORCED CONCRETE SHEAR WALLS DENG Ming-ke1 , KOU Jia-liang1,2 , LIANG Xing-wen1 , QIN Meng1 (1. School of Civil Engineering, Xi’an University of Architecture Technology, Xi’an 710055, China; 2. School of Civil Engineering and Architecture, Xi’an University of Technology, Xi’an 710048, China) Abstract: In order to improve the aseismic behavior of high performance concrete shear walls, 4 specimens of shear walls with ductile fibre reinforced concrete (DFRC) in the plastic region and shear span ratios of 2.1 were designed and the quasi-static tests were carried out. The failure mechanism, energy dissipation capacity and deformability of shear walls were studied under various DFRC zone height, axial compression ratios and confinement stirrup. The research shows that: 1) DFRC in the plastic region of shear walls can extend the rage of an elastic stage and delay the decr