延性纤维混凝土剪力墙抗震性能试验研究

发布时间：2018-05-18 13:09

本文选题：延性纤维混凝土 + 剪力墙　；参考：《工程力学》2014年07期

【摘要】：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。
[Abstract]:In order to improve the seismic behavior of high performance concrete shear wall, a ductile fiber reinforced concrete (DFRC) with ductile fiber reinforced concrete (DFC) in the plastic hinge region of shear wall is proposed in this paper. Four shear wall specimens with shear span ratio of 2.1 are designed, and quasi-static tests are carried out. By changing the height of DFRC region, axial compression ratio and the number of confined stirrups, the failure mechanism, energy dissipation capacity and deformation properties are studied. The results show that the elastic stage of shear wall specimens in the plastic hinge region is lengthened by DFRC, and the shear wall bearing capacity decreases slowly after yielding, and the width of the bending shear slant crack in the plastic hinge region of the shear wall can be effectively controlled. In order to prevent shear failure in plastic hinge region and increase the height of DFRC region, the deformation and energy dissipation capacity of shear wall increases obviously, and the number of confined stirrups in DFRC zone is increased, and the deformation and energy dissipation capacity of specimens is improved. (4) the shear wall specimens with DFRC are used in plastic hinge region. The damage degree of plastic hinge region is obviously reduced, which plays an important role in reducing the earthquake damage degree of shear wall.
【作者单位】：西安建筑科技大学土木工程学院;西安理工大学土木建筑工程学院;
【基金】：国家自然科学基金项目(51278402,51078305,50908187) 陕西省自然科学基金项目(2013JM7013) 西安理工大学博士启动基金项目(118-211206)
【分类号】：TU398.2;TU317.1;TU352.11

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