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.
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[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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