基于竹纤维和钢丝网增强的玄武岩筋混凝土梁抗弯延性试验研究

陈伟; 袁青; 马浩瀚; 朱子充; 覃国辉; 田政

doi:10.21656/1000-0887.430302

基于竹纤维和钢丝网增强的玄武岩筋混凝土梁抗弯延性试验研究

doi: 10.21656/1000-0887.430302

四川农业大学土木工程学院，四川都江堰 611830

详细信息

作者简介:
陈伟（1986—），女，硕士生导师（通讯作者. E-mail：chenwei@sicau.edu.cn）

中图分类号: TU528
计量
- 文章访问数: 553
- HTML全文浏览量: 191
- PDF下载量: 47
- 被引次数: 0
出版历程
- 收稿日期: 2022-10-04
- 修回日期: 2022-10-28
- 网络出版日期: 2023-02-24
- 刊出日期: 2023-02-15

Experimental Study on the Flexural Ductility of BFRP Bar Concrete Beams With Bamboo Fiber and Steel Wire Mesh

School of Civil Engineering, Sichuan Agricultural University, Dujiangyan, Sichuan 611830, P.R.China

摘要

摘要:
为研究竹纤维和钢丝网对玄武岩纤维筋混凝土梁抗弯延性的影响，该研究以竹纤维长度（0 mm、30 mm、45 mm）及钢丝网布置范围（无、1/2最大弯矩点间布置、全梁段布置）为变量，对7根基于竹纤维和钢丝网增强的玄武岩纤维筋混凝土梁进行了弯曲破坏试验，对其初裂荷载、裂缝开展、极限荷载、变形情况等进行了检测。通过试验数据分析了纤维长度和钢丝网布置范围对试件抗裂、抗变形性能的影响；借助函数模型得到7根试验梁的等效屈服点，计算出了试件的延性系数。结果表明竹纤维和钢丝网的掺入使玄武岩纤维筋混凝土梁的开裂荷载提高了12% ~ 68%，减小了裂缝分布间距及长度发展速度，同等荷载下试验梁的变形减小，延性系数增大了1.58% ~ 31.75%。
- 钢丝网 /
- 竹纤维 /
- 玄武岩纤维筋 /
- 混凝土梁 /
- 延性
Abstract:
To study the effects of bamboo fiber and steel wire mesh on the flexural ductility of basalt fiber reinforced polymer（BFRP）bar concrete beams, 7 BFRP bar concrete beams with bamboo fiber and steel wire mesh were tested with different bamboo fiber lengths (0 mm, 30 mm and 45 mm) and different steel wire mesh layout ranges (0, 1/2 maximum bending moment point layout and full beam length layout). The flexural failure tests of the 7 beams were carried out, and the initial crack loads, the crack developments, the ultimate loads and the deformations were detected. The effects of the fiber length and the wire mesh layout range on the crack resistance and the deformation resistance of the specimens were analyzed based on the test data. With the function model, the equivalent yield points of the 7 test beams were obtained, and their ductility coefficients were calculated. The results show that, the addition of bamboo fiber and steel wire mesh increases the cracking loads of BFRP bar concrete beams by 12%~68%, decreases the crack spacings and the crack length development speed, reduces the test beam deformation under the same load, and increases the ductility coefficient by 1.58%~31.75%.
- wire mesh /
- bamboo fiber /
- BFRP rebar /
- concrete beam /
- ductility

HTML全文

图 1 截面配筋图

Figure 1. The sectional reinforcement configuration

下载: 全尺寸图片幻灯片

图 2 钢丝网布置情况：（a） 1/2最大弯矩点间布置钢丝网；（b）全梁段布置钢丝网

Figure 2. The layout of the wire mesh: (a) the wire mesh is arranged between the points of 1/2 maximum bending moment; (b) the wire mesh arranged over the full beam length

下载: 全尺寸图片幻灯片

图 3 试验梁加载装置示意图

Figure 3. The test set-up

下载: 全尺寸图片幻灯片

图 4 试验梁的破坏特征和裂缝分布形态

Figure 4. Failure characteristics and fracture distribution patterns of the test beams

下载: 全尺寸图片幻灯片

图 5 平均裂缝间距

Figure 5. Average fracture spacings

下载: 全尺寸图片幻灯片

图 6 最大裂缝宽度

Figure 6. Maximum crack widths

下载: 全尺寸图片幻灯片

图 7 各试验梁变形曲线对比图

Figure 7. Comparison of deformation curves of various experimental beams

下载: 全尺寸图片幻灯片

图 8 等效弹塑性能量法

Figure 8. The equivalent elastic-plastic energy method

下载: 全尺寸图片幻灯片

图 9 单掺钢丝网与竹纤维对梁延性系数的影响

Figure 9. The respective effects of the wire mesh and the bamboo fiber on the beam ductility coefficient

下载: 全尺寸图片幻灯片

图 10 竹纤维长度对梁延性系数的影响

Figure 10. The effect of the bamboo fiber length on the beam ductility coefficient

下载: 全尺寸图片幻灯片

图 11 钢丝网布置范围对梁延性系数的影响

Figure 11. The effect of the wire mesh layout range on the beam ductility coefficient

下载: 全尺寸图片幻灯片

表 1 基体混凝土配合比

Table 1. Mix proportions of concrete

water	cement	crushed stone	medium sand
185 kg/m³	420 kg/m³	1273 kg/m³	572 kg/m³

下载: 导出CSV

表 2 竹纤维性能参数

Table 2. Performance parameters of bamboo fiber

material	fiber diameter	fiber length	density
bamboo fiber	1.5 mm	30 mm，45 mm	848.826 kg/m³

下载: 导出CSV

表 3 BFRP筋力学性能

Table 3. Mechanical properties of BFRP bars

diameter	tensile strength	elastic modulus
20 mm	1010.77 MPa	44 GPa

下载: 导出CSV

表 4 试验梁参数

Table 4. Parameters of test beams

test beam	steel wire mesh layout	bamboo fiber length l/mm
L-0-0	–	0
L-0-30	–	30
L-1/2-30	between the 1/2 maximum bending moment points	30
L-1/2-45	between the 1/2 maximum bending moment points	45
L-1-0	the whole beam section	0
L-1-30	the whole beam section	30
L-1-45	the whole beam section	45

下载: 导出CSV

表 5 主要试验结果

Table 5. Main test results

test beam	P_cr/kN	P_u/kN	Δ_u/mm
L-0-0	25	340	38
L-0-30	38	329	36
L-1/2-30	32	284	35
L-1/2-45	31	337	37
L-1-0	42	397	32
L-1-30	30	340	43
L-1-45	28	343	35

下载: 导出CSV

表 6 主要试验结果

Table 6. Main test results

test beam	P_y/kN	Δ_u/mm	Δ_y/mm	μ
L-0-0	318	38	31.47	1.21
L-0-30	298	36	27.06	1.33
L-1/2-30	256	35	24.13	1.45
L-1/2-45	301	37	29.37	1.26
L-1-0	353	32	26.09	1.23
L-1-30	299	43	27.03	1.59
L-1-45	313	35	25.71	1.36

下载: 导出CSV

参考文献(23)

[1]	姜浩, 朱思宇. 玄武岩纤维筋的性能及应用研究综述[J]. 四川建材, 2017, 43(8): 1-2 doi: 10.3969/j.issn.1672-4011.2017.08.001 JIANG Hao, ZHU Siyu. Review on properties and application of basalt fiber reinforcement[J]. Sichuan Building Materials, 2017, 43(8): 1-2.(in Chinese) doi: 10.3969/j.issn.1672-4011.2017.08.001
[2]	吴刚, 朱莹, 董志强, 等. 碱性环境中BFRP筋耐腐蚀性能试验研究[J]. 土木工程学报, 2014, 47(8): 32-41 doi: 10.15951/j.tmgcxb.2014.08.029 WU Gang, ZHU Ying, DONG Zhiqiang, et al. Experimental study on corrosion resistance of BFRP bars in alkaline environment[J]. China Civil Engineering Journal, 2014, 47(8): 32-41.(in Chinese) doi: 10.15951/j.tmgcxb.2014.08.029
[3]	MONALDO E, NERILLI F, VAIRO G. Basalt-based fiber-reinforced materials and structural applications in civil engineering[J]. Composite Structures, 2019, 214: 246-263. doi: 10.1016/j.compstruct.2019.02.002
[4]	尹世平, 华云涛, 徐世烺. FRP配筋混凝土结构研究进展及其应用[J]. 建筑结构学报, 2021, 42(1): 134-150 doi: 10.14006/j.jzjgxb.2019.0349 YIN Shiping, HUA Yuntao, XU Shilang. Research progress and application of FRP reinforced concrete structures[J]. Journal of Building Structures, 2021, 42(1): 134-150.(in Chinese) doi: 10.14006/j.jzjgxb.2019.0349
[5]	SHAMASS R, CASHELL K A. Experimental investigation into the flexural behaviour of basalt FRP reinforced concrete members[J]. Engineering Structures, 2020, 220: 110950. doi: 10.1016/j.engstruct.2020.110950
[6]	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 doi: 10.14006/j.jzjgxb.2018.0333 ZHU Haitang, CHENG Shengzhao, GAO Danying, et al. Flexural test and crack width calculation method of basalt fiber reinforced polymer reinforced steel fiber high-strength concrete beam[J]. Journal of Building Structures, 2020, 41(6): 133-142.(in Chinese) doi: 10.14006/j.jzjgxb.2018.0333
[7]	LI Z, ZHU H, ZHEN X, et al. Effects of steel fiber on the flexural behavior and ductility of concrete beams reinforced with BFRP rebars under repeated loading[J]. Composite Structures, 2021, 270: 114072. doi: 10.1016/j.compstruct.2021.114072
[8]	ABED F, ALHAFIZ A R. Effect of basalt fibers on the flexural behavior of concrete beams reinforced with BFRP bars[J]. Composite Structures, 2019, 215: 23-34. doi: 10.1016/j.compstruct.2019.02.050
[9]	QESHTA I M I, SHAFIGH P, JUMAAT M Z, et al. The use of wire mesh-epoxy composite for enhancing the flexural performance of concrete beams[J]. Materials & Design, 2014, 60: 250-259.
[10]	吴智深, 汪昕, 史健喆. 玄武岩纤维复合材料性能提升及其新型结构[J]. 工程力学, 2020, 37(5): 1-14 WU Zhishen, WANG Xin, SHI Jianzhe. Improvement of properties and new structures of basalt fiber composites[J]. Engineering Mechanics, 2020, 37(5): 1-14.(in Chinese)
[11]	李浪, 王清远, 董江峰. 纤维增强地聚物混凝土高温后抗折性能[J]. 应用数学和力学, 2014, 35(S1): 290-294 LI Lang, WANG Qingyuan, DONG Jiangfeng. Flexure performance of fiber-reinforced geopolymer concrete after high temperature[J]. Applied Mathematics and Mechanics, 2014, 35(S1): 290-294.(in Chinese)
[12]	董志强, 吴刚. FRP筋增强混凝土结构耐久性能研究进展[J]. 土木工程学报, 2019, 52(10): 1-19 doi: 10.15951/j.tmgcxb.2019.10.001 DONG Zhiqiang, WU Gang. Research progress on durability of FRP bars reinforced concrete structures[J]. China Civil Engineering Journal, 2019, 52(10): 1-19.(in Chinese) doi: 10.15951/j.tmgcxb.2019.10.001
[13]	周杰, 赵婷婷, 陈青青, 等. 基于GoogLeNet的混凝土细观模型应力-应变曲线预测[J]. 应用数学和力学, 2022, 43(3): 290-299 ZHOU Jie, ZHAO Tingting, CHEN Qingqing, et al. Prediction of concrete meso-model stress-strain curves based on GoogLeNet[J]. Applied Mathematics and Mechanics, 2022, 43(3): 290-299.(in Chinese)
[14]	吕瑶, 杨尚杰, 肖毅强. 竹材人造板在建筑应用中的绿色价值潜力研究[J]. 建筑科学, 2021, 37(8): 199-210 doi: 10.13614/j.cnki.11-1962/tu.2021.08.26 LÜ Yao, YANG Shangjie, XIAO Yiqiang. Research on the green value potential of bamboo wood-based panels in building applications[J]. Building Science, 2021, 37(8): 199-210.(in Chinese) doi: 10.13614/j.cnki.11-1962/tu.2021.08.26
[15]	KUMARASAMY K, SHYAMALA G, GEBREYOWHANSE H. Strength properties of bamboo fiber reinforced concrete[J]. IOP Conference Series Materials Science and Engineering, 2020, 981: 032063. doi: 10.1088/1757-899X/981/3/032063
[16]	CHIN S C, MOH J, DOH S I, et al. Strengthening of reinforced concrete beams using bamboo fiber[J]. Key Engineering Materials, 2019, 821: 465-471. doi: 10.4028/www.scientific.net/KEM.821.465
[17]	张昌. 竹纤维混凝土力学性能试验研究与耐久性分析[D]. 硕士学位论文. 上海: 上海交通大学, 2014. ZHANG Chang. Experimental study on mechanical properties and durability analysis of bamboo fiber concrete[D]. Master Thesis. Shanghai: Shanghai Jiao Tong University, 2014. (in Chinese)
[18]	陈升平, 马小霞, 卢应发, 等. FRP筋钢纤维混凝土梁延性性能研究[J]. 混凝土与水泥制品, 2019, 5: 59-63 doi: 10.19761/j.1000-4637.2019.05.059.05 CHEN Shengping, MA Xiaoxia, LU Yingfa, et al. Study on ductility performance of steel fiber reinforced concrete beams with FRP bars[J]. Concrete and Cement Products, 2019, 5: 59-63.(in Chinese) doi: 10.19761/j.1000-4637.2019.05.059.05
[19]	周道成, 常利晨. CFRP修复缺陷钢板应力解析模型[J]. 应用数学和力学, 2021, 42(12): 1276-1286 ZHOU Daocheng, CHANG Lichen. Stress analytical model of steel plate repaired with CFRP[J]. Applied Mathematics and Mechanics, 2021, 42(12): 1276-1286.(in Chinese)
[20]	刘鑫, 吴倩倩, 于国财, 等. 碳纤维/树脂基复合材料曲壁蜂窝夹芯结构的三点弯曲性能[J]. 应用数学和力学, 2022, 43(5): 490-498 LIU Xin, WU Qianqian, YU Guocai, et al. Three-point bending performance of carbon fiber/resin matrix composite with curved wall honeycomb sandwich structure[J]. Applied Mathematics and Mechanics, 2022, 43(5): 490-498.(in Chinese)
[21]	孔祥清, 于洋, 邢丽丽, 等. BFRP筋与钢筋混合配筋混凝土梁抗弯性能试验研究[J]. 玻璃钢/复合材料, 2018, 8: 48-54 doi: 10.3969/j.issn.1003-0999.2018.05.007 KONG Xiangqing, YU Yang, XING Lili, et al. Experimental study on flexural behavior of concrete beams reinforced with BFRP bars and steel bars[J]. Glass Reinforced Plastic/Composites, 2018, 8: 48-54.(in Chinese) doi: 10.3969/j.issn.1003-0999.2018.05.007
[22]	QIN R, ZHOU A, LAU D. Effect of reinforcement ratio on the flexural performance of hybrid FRP reinforced concrete beams[J]. Composites Part B: Engineering, 2017, 108: 200-209. doi: 10.1016/j.compositesb.2016.09.054
[23]	赵李俊. ECC-钢筋混凝土组合结构桥墩抗震性能研究[D]. 硕士学位论文. 重庆: 重庆大学, 2020. ZHAO Lijun. Study on seismic behavior of bridge pier of ECC reinforced concrete composite structure[D]. Master Thesis. Chongqing: Chongqing University, 2020. (in Chinese)