|
Structural engineering practice shows, structural strength, structure suffered load, the geometry of the structure, and many are random variables. Reliability design method based on the theory of probability and statistics have been widely used in many engineering fields of civil engineering, irrigation, roads, mining, machinery, electric power, aviation, aerospace, electronics and communication. However, due to the impact of the randomness and complexity of the components and structural reliability factors, effective, accurate reliability evaluation for the structure of the research is still in the ascendant. The research and application of structural reliability theory in civil engineering, water conservancy and hydropower project construction, housing construction, road engineering structures, railway roadbed engineering, port engineering and mechanical engineering is a research hotspot. With the further reform of domestic departments reliability specification and geotechnical reliability further conduct of the study, as an important part of the civil engineering, water conservancy and hydropower project construction, housing construction, road engineering structures, railway roadbed engineering, port engineering retaining wall structure design reliability method is a general trend. This paper systematically studied and briefly summarized the theory of structural reliability and structural reliability theory in gravity retaining wall, pile reliability calculation based on a systematic analysis, the main contents are as follows: (1) random variables Probability and Statistics with common probability distribution, structural reliability, the probability of failure and a reliable indicator of component reliability calculation method, the calculation of structural reliability analysis and briefly summarized. (2) carried out a detailed study of gravity retaining wall in the reliability analysis of uncertainty indicators. That the internal friction angle, backfill soil friction angle with the wall back filling severe basal friction coefficient, the hydraulic gradient are to obey the normal distribution of the random variable. (3) the concept of structural reliability gravity retaining wall single reliability calculation method, considering the gravity retaining wall sliding and stability against overturning, the intensity of bearing capacity of foundation and walls of the material tensile, compressive and shear failure mode, and to establish the corresponding limit state equation. And the use of improved FOSM method to calculate the reliability of a retaining wall failure mode. (4) The method of calculation of the structural system reliability analysis and summarized briefly introduced the basic concepts of structural system reliability analysis of series parallel system reliability calculation method to study the basic component in the deformation of the steel structure under reliable JC method to calculate the degree of the mode. (5) the use of structural reliability theory, the instability of gravity retaining wall against sliding against overturning instability, lack of foundation bearing capacity, the walls of the material tensile failure, the pressure on the walls of the material destruction, the walls of the material by shear The failure mode as a series system reliability under various failure modes based on the calculation of gravity retaining wall structural system reliability narrow boundaries. The bottom of the pile grouting irrigation piling basis the reliability calculation mode eccentric loads JC method and the single reliability, considering the failure mode, seeking the pile bottom Grouting reliability narrow boundaries.
|