Research on the slip deformation characteristics and improvement measures of concrete-faced rockfill dams on dam foundations with large dip angles.

The pumped storage power station (PSPS) is an important measure to achieve the strategic goal of "dual carbon". As one of the preferred types for the upper reservoir dams of PSPSs, the concrete-faced rockfill dam (CFRD) often has a dam foundation on a steep transverse slop and is prone to produce slip deformation along the slope, resulting in poor anti-sliding stability of the dam slope. It is dangerous for the operation safety of PSPSs.

Experimental Research on the Energy Evolution of Concrete under Impact Loading.

This paper presents an experimental study on the dynamic strength of concrete by using a split Hopkinson pressure bar. The stress-strain relationship and fragmentation degree of concrete were analyzed. The change process of the incident energy, reflection energy, transmission energy and consumption energy of concrete was calculated.

Numerical Reconstruction Model and Simulation Study of Concrete Based on Damaged Partition Theory and CT Number.

The applicability of mesoscopic models plays an important role in studying the mesoscopic mechanical properties of concrete. In this study, the computerized tomography (CT) test of concrete under uniaxial compression conditions is conducted using a portable dynamic loading equipment developed by Xi'an University of Technology and a medical Marconi M8000 spiral CT scanner. On the basis of damage partition theory, a probabilistic statistical method for determining threshold values is proposed, and a CT test images is obtained and divided into aggregate, hardened cement and hole-crack areas.

Enhancement Mechanism of the Dynamic Strength of Concrete Based on the Energy Principle.

This paper analyzes the relationship between the rates of change of elastic strain energy, the strength during the concrete failure process, and proposes that the increased dynamic strength of concrete was caused by the hysteresis effect of energy release-according to the basic principle of energy conversion. Dynamic Brazilian disc tests were carried out on concrete specimens, with diameter of 100 mm, by using the split Hopkinson pressure bar. Test results were obtained through using a gas gun, with an impact pressure of 0.