Strain Measurement of Steel Fiber-Reinforced Concrete under Multiaxial Loads with Fiber Bragg Grating
Strain Measurement of Steel Fiber-Reinforced Concrete under Multiaxial Loads with Fiber Bragg Grating
复制标题
利用光纤布拉格光栅测量多轴载荷下钢纤维混凝土的应变
DOI：
10.14359/51684366
复制
发表时间：
2013
影响因子：
1.7
通讯作者：
M. Curbach
中科院分区：
文献类型：
--
作者：
R. Ritter;M. Curbach
对于多轴加载试验，用于确定应变的传统测量方法在显示样本的材料行为方面受到限制，特别是在小变形范围内。因此，测量的应变会在整个载荷范围内受到影响，并且可能需要进行校正。本文提出了一种使用光纤布拉格光栅来确定混凝土样本内部应变的测量方法，并提供预期的测试结果，即使是小应变。通过以四面体形状排列应用六个测量点，可以确定法向应变和剪切应变。在单轴载荷试验中使用应变计进行的参考测量表明，该测量方法可产生可靠的测试结果。对于压缩-压缩拉伸载荷的多轴载荷试验，也可以实际确定变形行为。
Regarding multiaxial loading tests, conventional measuring methods for the determination of strains are limited in showing the material behavior of specimens, especially in the range of small deformations. As a result, the measured strains are influenced within the entire loading range and a correction might be required. This paper presents a measuring method that uses fiber Bragg gratings to determine strains inside concrete specimens and provides test results as expected, even concerning small strains. By applying six measuring points in a tetrahedron-shaped arrangement, normal and shear strains can be determined. Reference measurements with strain gauges at uniaxial loading tests show that this measuring method produces reliable test results. Regarding multiaxial loading tests with compression-compression tension loads, a realistic determination of the deformation behavior was also possible.