Device for testing fracture energy of concrete by three-point bending beam without self-gravity doing work
A technology of three-point bending beams and concrete beams, applied in measuring devices, using stable tension/pressure testing materials, instruments, etc., can solve the problems of large number of specimens, waste of materials and labor, and cumbersome data processing, etc. Achieve the effect of reducing stiffness, simple calculation steps and easy operation
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[0010] Specific embodiments of the present invention will be described in detail below in conjunction with the technical solution and the drawings.
[0011] One-time pouring of a concrete beam 1 with a total length of 1.912 times the clear span. The height, width, span and length of the prefabricated joint of the beam are taken according to the test method of three-point bending beam recommended by RILEM for testing concrete fracture energy. The support 2 is hinged. The support, the force sensor 7 and the force transmission pad 3 are placed at the middle of the top span of the concrete beam, and the angle steel connecting rod 4 is fixed at the middle point of the beam above the test piece support with screws 9, at the middle point of the angle steel connecting rod and the bottom of the beam Paste a thin steel sheet 6 at the middle of the span, and fix the clip extensometer 5 between the two thin steel sheets. The sensor 7 and the clip extensometer 5 are both connected to the teste...
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