Search

The finite element method was used to analyse the interface stress of composite piles under vertical, horizontal and temperature loads. The results show that under vertical load, the cementing cement of composite piles has stress concentration at the position where section varied, and when the settlement of the pile top exceeds 150 mm, the cement has the risk of crushing. Under horizontal load, a tensile crack area appears on the tensile side of the cement, and the length of the tensile fracture area increases with the increase of the displacement of the pile top. Under temperature load, the maximum interface shear stress increases with the increase of temperature. Under the action of vertical, horizontal and temperature loads, the shear stress between each material of the pile is less than the bonding strength of the material, and the bonding surface will not slide relative to each other. [ABSTRACT FROM AUTHOR]

Because of its irregular shape, it is inaccurate to calculate the bearing capacity of the A-shaped mat foundation by a conventional method, which may have potential safety hazards. In this paper, the vertical bearing capacity of the mat is obtained by using the equivalent calculation method (ECM) and the finite element method respectively, and compared with the centrifuge test results. A correction method based on the ECM is proposed. Influences of foundation dimensional parameters on the H, M and H-M combined bearing capacity are studied. Expressions of H-M failure envelopes related to the dimensional parameters are established. A new form of V-H-M envelope expression for mats is suggested according to the effect of vertical load on H-M capacity. The modified ECM and the V-H-M envelope proposed in the paper can be used to quickly evaluate the vertical bearing capacity of the A-shaped mat and its stability under coupling loads. [ABSTRACT FROM AUTHOR]

Terrain synthesis has been a hot topic in the field of computer graphics and image processing. However, there are still issues in terrain synthesis where synthesis results are difficult to control and not realistic enough. To address these problems, this paper proposes an interactive terrain elevation map generation method based on the synthesis of a single sample terrain elevation map. First, we propose a method to extract the skeleton from a terrain elevation map and a user sketch. Second, we construct a skeleton sample feature map based on the terrain elevation map and the user sketch. Finally, we propose a matching cost function to match image patches of the terrain sample and the user sketch. The proposed method can obtain a synthesis result containing the features of both the terrain sample and the user sketch, and then generates a synthetic terrain elevation map. The experimental results demonstrate the effectiveness of the proposed method, where the synthesized results can meet the needs of users. [ABSTRACT FROM AUTHOR]