作者：陶琦1, 付强1, 王悦石2, 夏熙蕾2
作者单位：1. 中铁十九局集团第六工程有限公司，江苏 无锡 214028;
2. 淮阴工学院交通工程学院，江苏 淮安 223003
关键词：玄武岩纤维混凝土;体积掺量;反复轴压;阻裂增韧;试验研究
摘要：
为探究反复压荷载作用下，玄武岩纤维对混凝土力学行为响应的影响，开展不同纤维掺量的玄武岩纤维混凝土循环轴压试验。试验结果表明：在一定玄武岩纤维掺量的范围内，随着纤维掺量的增加，混凝土抗压强度和抗劈拉强度均有所增大，且峰值应力、残余应变亦越大。循环荷载下混凝土应力应变曲线包络线呈近似“正偏态分布”型，与普通混凝土相比，玄武岩纤维混凝土表现出良好的延性和阻裂性。随着轴向应变的增大，应力退化率呈下降趋势，而损伤系数则呈上升趋势，玄武岩纤维能减缓混凝土性能退化。能量耗散与加卸载循环次数的关系曲线呈“金字塔”型，玄武岩纤维对裂缝的桥接作用可吸收大量能量，对结构抗震有利。
Experimental study on the influence of fiber content on the working characteristics of basalt fiber reinforced concrete under cyclic compression
TAO Qi1, FU Qiang1, WANG Yueshi2, XIA Xilei2
1. Sixth Engineering Co., Ltd., China Railway 19th Bureau Group, Wuxi 214028, China;
2. School of Traffic Engineering, Huaiyin Institute of Technology, Huai’an 223003, China
Abstract: In order to explore the effect of basalt fiber on the mechanical behavior of concrete under repeated compressive load, cyclic axial compression tests of basalt fiber concrete with different fiber contents were carried out. The test results show that in a certain scope of basalt fiber content, with the increase of basalt fiber content, the compressive strength and splitting tensile strength of concrete increase, and the peak stress and residual strain also increase. The envelope of stress-strain curve of concrete under cyclic load shows “normal skew distribution”. Compared with ordinary concrete, basalt fiber concrete shows ductility and crack resistance. With the increase of axial strain, the stress degradation rate decreases, while the loss coefficient increases. Basalt fiber greatly slows down the performance degradation of concrete. The relationship curve between energy dissipation and loading and unloading cycles is in the shape of “pyramid”, and the bridging effect of basalt fiber on cracks absorbs a lot of energy, which is beneficial to structural earthquake resistance.
Keywords: basalt fiber reinforced concrete;volume content;repeated axial compression;crack resistance and toughening;test study
2023, 49(2):168-173 收稿日期: 2021-07-27;收到修改稿日期: 2021-08-20
基金项目: 国家自然科学基金青年项目（51808248）
作者简介: 陶琦(1976-),男,辽宁阜新市人,高级工程师,硕士,主要从事岩土工程及混凝土材料试验研究
参考文献
[1] 朱海堂, 程晟钊, 高丹盈, 等. 玄武岩纤维增强聚合物筋钢纤维高强混凝土梁受弯试验及裂缝宽度计算方法研究[J]. 建筑结构学报, 2020, 41(6): 133-142
[2] 周迪, 刘昌明, 王志刚, 等. 小波变换在混凝土冲击回波检测中的应用[J]. 中国测试, 2019, 45(4): 135-140
[3] 许金余, 李为民, 黄小明, 等. 玄武岩纤维增强地质聚合物混凝土的动态本构模型[J]. 工程力学, 2010, 27(4): 111-116
[4] 李京军, 牛建刚, 吴运超, 等. 短切玄武岩纤维轻骨料混凝土力学性能试验研究[J]. 建筑结构, 2016, 46(15): 47-51
[5] RUBINSTEIN A A. Fracture toughness model of fiber reinforced ceramics[C]// Engineering Mechanics. ASCE, 2015: 569-574.
[6] RAMAKRISHNAN V, TOLMARE N S, BRIK V B. Performance evaluation of 3-d basalt fiber reinforced concrete & basalt rod reinforced concrete[R]. Nchrp Idea Program Project Final Report, 1998.
[7] 王钧, 马跃, 张野, 等. 短切玄武岩纤维混凝土力学性能试验与分析[J]. 工程力学, 2014, 31(S1): 99-102
[8] 成涛华, 李玉香. 玄武岩纤维增强混凝土力学性能研究[J]. 混凝土与水泥制品, 2017(1): 53-56
[9] 张向冈, 秦文博, 田琦, 等. 玄武岩纤维混凝土材料性能研究进展[J]. 混凝土, 2018(2): 94-97
[10] 赵燕茹, 郭子麟, 范晓奇, 等. 玄武岩纤维混凝土应力应变关系及孔结构分析[J]. 硅酸盐通报, 2017, 36(12): 4142-4150
[11] 赵高锦, 赵卓, 陈歆, 等. 玄武岩纤维混凝土应力-应变全曲线试验研究[J]. 水利与建筑工程学报, 2019, 17(01): 103-107
[12] 林旭梅, 刘帅, 石智梁. 基于改进PSO-FNN算法的钢筋混凝土腐蚀检测研究[J]. 中国测试, 2020, 46(12): 149-155
[13] 谢开仲, 刘振威, 盖炳州, 等. 机制砂混凝土应力- 应变试验研究[J]. 硅酸盐通报, 2020, 39(12): 3823-3831
[14] ABBASNIA R, HOSSEINPOUR F, ROSTAMIAN M, et al. Cyclic and monotonic behavior of FRP confined concrete rectangular prisms with different aspect ratios[J]. Construction & Building Materials, 2013, 40(3): 118-125
[15] 尹晓娟. 新型快通修补材料与道面混凝土基材粘结性能研究[J]. 中国测试, 2020, 46(9): 154-160
[16] LI B, XU L, CHI Y, et al. Experimental investigation on the stress-strain behavior of steel fiber reinforced concrete subjected to uniaxial cyclic compression[J]. Construction and Building Materials, 2017, 140(1): 109-118
