TY - GEN

T1 - Full scale tests on steel and synthetic fiber reinforced tunnel lining segments

AU - Kühbacher, Manuel

AU - Galler, Robert

AU - Huß, Michael

PY - 2023/5/29

Y1 - 2023/5/29

N2 - In Austria, various tests are performed on fiber-reinforced concrete in the course of a research project to create a basis for the use of fiber-reinforced concrete segments in Austria. For this purpose, several concrete mixtures and production tests with different fiber contents, as well as fiber materials were performed on a laboratory scale in order to evaluate the respective fresh concrete properties. The mechanical parameters of this samples were investigated at 24h, 7 days and 28 days from the date of manufacturing in order to be able to represent the strength development as well. After the evaluation of the small-scale tests, synthetic and steel fiber reinforced concrete segments were cast, which were then subjected to a large-scale test to verify their load-bearing capaticity. Withthese tests, the typical load-bearing behavior can be demonstrated, under consideration of the normal force acting in a segment ring. Another objective is to establish a correlation between the large-scale and small-scale tests in order to be able to estimate the load-bearing behavior of the segments on the basis of standard tests in the future. The test results show the positive influence of the normal force on the load-bearing capacity of the segments and also the low scatter of the results.

AB - In Austria, various tests are performed on fiber-reinforced concrete in the course of a research project to create a basis for the use of fiber-reinforced concrete segments in Austria. For this purpose, several concrete mixtures and production tests with different fiber contents, as well as fiber materials were performed on a laboratory scale in order to evaluate the respective fresh concrete properties. The mechanical parameters of this samples were investigated at 24h, 7 days and 28 days from the date of manufacturing in order to be able to represent the strength development as well. After the evaluation of the small-scale tests, synthetic and steel fiber reinforced concrete segments were cast, which were then subjected to a large-scale test to verify their load-bearing capaticity. Withthese tests, the typical load-bearing behavior can be demonstrated, under consideration of the normal force acting in a segment ring. Another objective is to establish a correlation between the large-scale and small-scale tests in order to be able to estimate the load-bearing behavior of the segments on the basis of standard tests in the future. The test results show the positive influence of the normal force on the load-bearing capacity of the segments and also the low scatter of the results.

KW - fiber reinforced concrete

KW - segmental lining element

KW - steel fiber reinforced concrete

KW - synthetic fiber reinforced concrete

M3 - Conference contribution

BT - -

ER -