玄武岩纤维混凝土三点弯曲梁的断裂性能

金轶凡; 陶燕; 柴栋; 徐赛仙; 李柳红

doi:10.11835/j.issn.2096-6717.2021.128

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玄武岩纤维混凝土三点弯曲梁的断裂性能

土木工程 | 更新时间：2023-03-07

- 玄武岩纤维混凝土三点弯曲梁的断裂性能
- Fracture performance of basalt fiber concrete three-point bending beam
- 土木与环境工程学报 2023年45卷第2期页码：150-157
- 作者机构：
  
  1.昆明理工大学建筑工程学院，昆明 650500
  2.湖南大学土木工程学院，长沙 410082
- 作者简介：
  
  金轶凡（1995- ）,男,主要从事纤维混凝土研究,E-mail：13586125367@163.com。
  陶燕（通信作者），女，博士，副教授， E-mail：tylshj@163.com。
- 基金信息：
  
  国家科技支撑计划课题(2014BAL06B03)
- DOI：10.11835/j.issn.2096-6717.2021.128
  中图分类号： TU528.584
- 收稿：2020-01-15，
  
  纸质出版：2023-04-25
- 稿件说明：
移动端阅览
金轶凡, 陶燕, 柴栋, 等. 玄武岩纤维混凝土三点弯曲梁的断裂性能[J]. 土木与环境工程学报, 2023,45(2):150-157.

JIN Yifan, TAO Yan, CHAI Dong, et al. Fracture performance of basalt fiber concrete three-point bending beam[J]. Journal of Civil and Environmental Engineering, 2023, 45(2): 150-157.
金轶凡, 陶燕, 柴栋, 等. 玄武岩纤维混凝土三点弯曲梁的断裂性能[J]. 土木与环境工程学报, 2023,45(2):150-157. DOI： 10.11835/j.issn.2096-6717.2021.128.

JIN Yifan, TAO Yan, CHAI Dong, et al. Fracture performance of basalt fiber concrete three-point bending beam[J]. Journal of Civil and Environmental Engineering, 2023, 45(2): 150-157. DOI： 10.11835/j.issn.2096-6717.2021.128.

摘要

为探讨玄武岩纤维混凝土(BFRC)的断裂性能，采用《水工混凝土断裂试验规程》的三点弯曲梁法，制作缝高比为0.4的不同纤维长度及掺量的混凝土试件，利用MTS试验机对试件进行加载试验，得到玄武岩纤维混凝土三点弯曲梁的试验结果，并对P-CMOD曲线、起裂韧度、失稳韧度及断裂能等断裂参数进行分析，结果表明：掺入玄武岩纤维后，试件的断裂性能得到了提升，纤维掺量越多，纤维长度越长，P-CMOD曲线的下降段越饱满；纤维长度为18 mm、掺量为1.5%的试件起裂韧度及失稳断裂韧度的提升最为明显；纤维长度为12 mm、掺量为1.5%的试件断裂能最大。

Abstract

In order to explore the fracture performance of basalt fiber concrete (BFRC)

the three-point bending beam method of the

Hydraulic Concrete Fracture Test Procedure

was used to fabricate concrete specimens with different fiber lengths and dosages with a joint height ratio of 0.4

and the MTS test was used. The machine carried out the loading test on the specimen

obtained the test results of the basalt fiber concrete three-point bending beam

and analyzed the fracture parameters such as P-CMOD curve

initiation toughness

instability toughness and fracture energy

and obtained the following conclusions: After the basalt fiber is added

the fracture performance of the specimen has been improved. The more the fiber content

the longer the fiber length

and the fuller the descending section of the P-CMOD curve; the specimen with a fiber length of 18 mm and a content of 1.5% will start the improvement of fracture toughness and instability fracture toughness is the most obvious; the specimen with a fiber length of 12 mm and a content of 1.5% has the largest fracture energy.

关键词

Keywords

references

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