Loading device for concrete material crack growth test under dynamic load

A technology of loading device and concrete, which is applied in the direction of applying repetitive force/pulse force to test the strength of materials, etc., can solve problems such as inability to apply dynamic load, and achieve the effects of low unit price, simple operation and convenient maintenance.

Inactive Publication Date: 2012-09-19
HOHAI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the technical problem that the existing compact tensile test device cannot apply dynamic load, the present invention designs a compact tension-compression loading device capable of applying dynamic load by improving it

Method used

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  • Loading device for concrete material crack growth test under dynamic load
  • Loading device for concrete material crack growth test under dynamic load
  • Loading device for concrete material crack growth test under dynamic load

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Embodiment Construction

[0031] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0032] A loading device for cracking and expansion testing of concrete materials under dynamic load, characterized in that it includes a dynamic load actuator 1, a vertical force sensor 2, a wedge-shaped loading frame 3, a steel shaft 4, a bearing 5, a horizontal force sensor 6, and a spring 7. Dynamic data collector 11; dynamic load operating head 1 and wedge-shaped loading frame 3 are connected through vertical force sensor 2; two quarter points on the upper part of concrete sample 9 each wear a steel shaft 4, each steel shaft 4 A bearing 5 and a horizontal telescopic rod 8 are respectively fixed at both ends, and the length of the horizontal telescopic rod 8 on both sides of the steel shaft 4 is adjusted by adjusting the lock nut 12; one end of the spring 7 passes through the horizontal force sensor 6 and a steel The telescopic rod 8 on the shaft 4 is conn...

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Abstract

The invention relates to a loading device for a concrete material crack growth test under a dynamic load. An actuation head of a fatigue tester is connected with a wedge loading frame through a vertical force sensor; steel shafts are arranged at two quartiles at the upper part of a concrete sample in a penetrating manner; both ends of each steel shaft are respectively and fixedly provided with a bearing and a horizontal stretching rod; a spring is stretched by adjusting a distance of each horizontal stretching rod at the both sides of the steel shaft, so as to supply horizontal pre-compression to the concrete sample; a dynamical data collector is connected by using vertical and horizontal sensors so as to measure actual tension of the spring at different time; an actual acting force acting on the concrete sample at each time can be calculated by a calculation formula provided according to a working principle; and finally, a load is supplied to the concrete sample. The loading device provided by the invention can supply the tension-compression dynamic load for opening and closing a crack for the concrete sample, so that the loading device can be used for testing a crack growth process of a concrete material under the dynamic load.

Description

technical field [0001] The invention relates to a concrete tension and compression test device, in particular to a compact tension and compression loading device under dynamic load. Background technique [0002] As the infrastructure of the national economy, water conservancy projects play an important role in various aspects such as social and economic development, public safety, and ecological environment, and the buildings that play a key role in retaining water in water conservancy projects are dams. In my country, the dam sites of most of the concrete dams that have been built or are under construction are located in the southwest and northwest regions with frequent seismic activities. For example, the design seismic acceleration of Xiaowan concrete arch dam (292 m high) is 0.308 g, and The design acceleration of the concrete gravity dam site is 0.399 g, and the Dagangshan Arch Dam, which started construction in 2006, has a design peak seismic acceleration of 0.5575 g. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/32
Inventor 孙立国杜成斌于国军陈玉泉
Owner HOHAI UNIV
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