Method for calculating I-type stress intensity factor of rock-concrete interface crack under action of continuous load

A stress intensity factor and concrete technology, applied in design optimization/simulation, special data processing applications, instruments, etc., can solve problems that have not yet been proposed to consider interface crack stress intensity factors, calculation methods, etc.

Active Publication Date: 2021-06-11
DALIAN UNIV OF TECH
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  • Abstract
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Problems solved by technology

According to the investigation of the inventors, no research on the fracture mechanism of the rock-concrete interface under continuous load has been found, and no calculation method for the stress intensity factor of interface cracks considering the continuous load has been proposed.

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  • Method for calculating I-type stress intensity factor of rock-concrete interface crack under action of continuous load
  • Method for calculating I-type stress intensity factor of rock-concrete interface crack under action of continuous load
  • Method for calculating I-type stress intensity factor of rock-concrete interface crack under action of continuous load

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Embodiment Construction

[0021] In order to make the purpose, technical solution and beneficial effect of the present invention clearer, the present invention will be clearly described below by taking a rock-concrete composite beam three-point bending load-bearing specimen as an example and referring to the accompanying drawings. Apparently, the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0022] The rock-concrete composite beam three-point bending test piece described in this embodiment is shown in Figure 1, and the test piece geometric parameters are as follows: L=500mm, B=D=100mm, S=400mm, a 0 = 30mm. The elastic modulus E of rock and concrete 1 ,E 2 , Poisson's ratio ν 1 、ν 2 , and the interface equivalent elastic modulus E calculated by equation...

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Abstract

The invention belongs to the field of safety evaluation of concrete gravity dams, and provides a method for calculating an I-type stress intensity factor of a rock-concrete interface crack under the action of a continuous load. The interface crack I-type stress intensity factor under the continuous load effect can be simply and conveniently calculated, then quantitative description of an interface crack tip stress field under the continuous load effect is achieved, and a reference is provided for safety evaluation during the service period of a concrete gravity dam.

Description

technical field [0001] The invention belongs to the field of safety evaluation of concrete gravity dams, and relates to a method for calculating type I stress intensity factors of rock-concrete interface cracks under continuous load. Background technique [0002] For a concrete gravity dam located on a rock foundation, the interface between the rock foundation and the concrete dam body is a weak link. Improper pouring and maintenance during construction, as well as load and environmental effects during service, make the interface area prone to initial defects, which threaten the safe operation of concrete gravity dams. Many scholars have carried out the exploration of the interface fracture mechanism under quasi-static conditions. Among them, the fracture criterion based on the stress intensity factor has been extensively studied and widely used. The stress intensity factor is a physical quantity that reflects the strength of the stress field at the crack tip, and is the mo...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20G06F119/02G06F119/14
CPCG06F30/20G06F2119/02G06F2119/14
Inventor 董伟袁文岩赵晓瑜姚洁香
Owner DALIAN UNIV OF TECH
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