Advanced Materials Research Vol. 702

Abstract: Safe analysis of the progressive slide is used to estimate the stability of arch dam. The space stochastic parameters are surveyed through considering the relativity of parameter. The stability reliability analysis can be divided into element, sub-structure or sub-system, system.etc. From element to system calculate abutment’s ability. Sub-structure is composed by elements parallel connection. System is composed by sub-structures in series. The substructure method is applied to study the interaction between arch dam and its abutment. In this paper, the weakness part of abutment was found by cracking analysis of the progressive slide, and the safe evaluation was given.

Abstract: A numerical implement to simulate the crack propagating process in arch dam and rock base has been put forward. A new remeshing strategy of FEM meshing grid was presented for improving the calculation accuracy and efficiency. In the period of dividing the dam structure and the foundation rock into an appropriate number of discrete subregion (finite elements), the adaptive element was used to divide the original 3-D element into 8 son-elements analogical to its father-elements entirely. Of course the 2-D element was divided into 4 son-elements analogical to its father-elements entirely using the same method. The element shape function was used to solve suspend nodal point. The arithmetic and shape function’s formulation also were put forward. To satisfy the engineering accurate result, the adaptive element was used to divide the son-element or the grandson-element again. In the calculating processor, the arithmetic of adaptive load step was presented. Only one element failures in a load step. So the cracking processor can be found with automatic mesh generation. An arch dam has been as example to validate the method is right and stability. The arithmetic has important theory and utility value.

Abstract: The failure process of hydro structures concrete structure and time and space has stochastic relation. The durability failure mechanism, durability failure type and durability failure mode were presented in the paper which is different from caviling engineering. The relation of durability and resisting ability was studied. Based on credibility theory, service-life of hydro structure concrete member was predicted. and the mend measures to improve durability was put forward.

Abstract: Based on the normal H-K rheology model, a new rheological model containing fracture elements for concrete or rock cracked body is introduced. The method to ascertain rheology state is put forward. The new rheological model can change to Maxwell or Kelvin model to express the instantaneous failure, delayed failure state and the accelerating segment. The researching failure element method was used to study the crack propagation. Then the cracking elements were studied using rheology mechanics to solve the cracking time. At last a case study was given to validate the method is feasible.

Abstract: Removed due to plagiarism.

Abstract: Removed due to plagiarism.

Abstract: The research presented the mechanical properties under compressive loads of a natural stone masonry. The characterization of the basic materials and different stone masonry prisms are included. Sandstone and low strength lime–cement mortar were used for this experimental work. The morphological characteristics of walls were also taken into account, in order to manufacture prism specimens that were as representative as possible of the Chinese typology. The experimental values were compared with the analytical in different masonry.

Abstract: The experimental investigation on the fixed-end supported PFRP channel beams subjected to three-point loading is presented. The objectives of this study are to evaluate the effects of the span on the structural behaviors, the critical buckling loads and the modes of failure of the PFRP beams, and to compare the obtained deflections with those obtained from the Timoshenko’s shear deformation beam theory equation in order to check the adequacy of the equation. The beam specimens have the cross-sectional dimensions of 152 43 10 mm with span-to-depth ratio ranging from 16 to 33. A total of twenty-two specimens were performed. Based on the experimental results, it was found that the loads versus mid-span vertical deflection relationships of the beam specimens are linear up to the failure, but the load versus mid-span lateral deflection relationships are geometrically nonlinear. The general modes of failure are the flexural-torsional buckling. Finally, the Timoshenko’s shear deformation beam equation can satisfactorily predict the vertical deflection of the beams within acceptable engineering error.

Abstract: In order to study the wave force acting on the hollow blocks structures locating at the permeable foundation under the regular wave flume, the wave tank is established basing on improved N-S Equations. And the moving boundary’s generating wave and wave absorption of momentum source are adopted in the numerical wave flume. It can also be simulated permeable foundation by porous media module. Then mathematical model can be constructed under the interaction between waves and hollow block when PISO is used to couple velocity and pressure fields. At the same time, the numerically calculated results of the wave force acting on the hollow blocks are compared with the experimental data in agreement. In conclusion, the variation of the wave force with incident wave height and period is obtained through the numerical calculation.