ISO 10406-1:2015 コンクリートの繊維強化ポリマー（FRP）補強—試験方法—パート1：FRPバーとグリッド | ページ 5

3.1.1

alkalinity

condition of having or containing hydroxyl (OH-) ions; containing alkaline substances

Note 1 to entry: In concrete, the initial alkaline environment has a pH above 13.

3.1.2

anchorage reinforcement

latticed or spiral reinforcing steel or FRP connected with the anchorage and arranged behind it

3.1.3

anchoring section

end part of a test piece where an anchorage is fitted to transmit loads from the testing machine to the test section

3.1.4

average load

<stress> average of the maximum and minimum repeated load (stress)

3.1.5

bending angle

angle formed by the straight sections of a test piece on either side of the deflector

3.1.6

bending diameter ratio

ratio of the external diameter of the deflector surface in contact with the FRP bar, and the nominal diameter of the FRP bar

3.1.7

bending tensile capacity

tensile load at the moment of failure of the test piece

3.1.8

coefficient of thermal expansion

average coefficient of linear thermal expansion between given temperatures

Note 1 to entry: The average of the given temperatures is taken as the representative temperature.

3.1.9

continuous fibre

general term for continuous fibres of materials such as carbon, aramid, and glass

3.1.10

coupler

device coupling tendons

3.1.11

creep failure capacity

load causing failure after a specified period of time from the start of a sustained load

Note 1 to entry: In particular, the load causing failure after 1 million hours is referred to as the million-hour creep failure capacity.

3.1.12

creep failure strength

stress causing failure after a specified period of time from the start of a sustained load

Note 1 to entry: In particular, the load causing failure after 1 million hours is referred to as the million-hour creep failure strength.

3.1.13

creep failure time

time between the start of a sustained load and failure of a test piece

3.1.14

creep failure

failure occurring in a test piece due to a sustained load

3.1.15

creep strain

differential change in length per unit length occurring in a test piece due to creep

3.1.16

creep

time-dependent deformation of an FRP bar subjected to a sustained load at a constant temperature

3.1.17

deflected section

section of an FRP bar that is bent and maintained at the required bending angle and bending diameter ratio

3.1.18

deflector

device used to maintain the position, alter the bending angle, or alleviate the stress concentrations in the FRP bar and which is sometimes installed in the deflected section

3.1.19

fatigue strength

maximum repeated stress at which the test piece does not fail at the prescribed number of cycles

3.1.20

fibre-reinforced polymer

FRP

composite material, moulded and hardened to the intended shape, consisting of continuous fibres impregnated with a fibre-binding polymer

3.1.21

frequency

number of loading (stressing) cycles in 1 s during the test

3.1.22

FRP bar

composite material formed into a long, slender structural shape suitable for use as reinforcement in concrete and consisting primarily of longitudinal unidirectional fibres bound and shaped by a rigid polymer resin material

3.1.23

gauge length

straight portion along the length of a test piece used to measure the elongation using an extensometer or a similar device

3.1.24

grid

two-dimensional (planar) or three-dimensional (spatial) rigid array of interconnected FRP bars that form a continuous lattice that can be used to reinforce concrete

3.1.25

load amplitude

load (stress) amplitude

one-half of the load (stress) range

3.1.26

load (stress) range

difference between maximum and minimum repeated load (stress)

3.1.27

maximum repeated load (stress)

maximum load (stress) during repeated loading

3.1.28

maximum tensile force

maximum tensile load sustained by a test piece during the tensile test

3.1.29

minimum repeated load (stress)

minimum load (stress) during repeated loading

3.1.30

nominal cross-sectional area

value obtained upon dividing the volume of the FRP specimen by its length

3.1.31

nominal diameter

diameter of FRP calculated assuming a circular section

3.1.32

nominal peripheral length

peripheral length of the FRP that forms the basis for calculating the bond strength and that shall be determined separately for each FRP

3.1.33

number of cycles

number of times the repeated load (stress) is applied to the test piece

3.1.34

relaxation

stress relaxation

time-dependent decrease in load in an FRP held at a given constant temperature with a prescribed initial load applied and held at a given constant strain

3.1.35

relaxation rate

percentage reduction in load relative to the initial load after a given period of time, under a fixed strain

Note 1 to entry: In particular, the relaxation value after 1 million hours (approximately 114 years) is referred to as the hundred-year relaxation rate.

3.1.36

repeated load (stress)

load (stress) alternating cyclically between fixed maximum and minimum values

3.1.37

S-N curve

curve plotted on a graph with repeated stress on the vertical axis and the number of cycles to fatigue failure on the horizontal axis

3.1.38

tendon

FRP

resin-bound construction made of continuous fibres in the shape of a tendon used to reinforce concrete uniaxially

Note 1 to entry: Tendons are usually used in pre-stressed concrete.

3.1.39

thermo-mechanical analysis

TMA

method for measuring deformation of a material as a function of either temperature or time, by varying the temperature of the material according to a calibrated programme, under a non-vibrating load

3.1.40

TMA curve

<TMA> graph with temperature or time represented on the horizontal axis and deformation on the vertical axis

3.1.41

ultimate strain

strain corresponding to the maximum tensile force