9results about How to "Clear concept" patented technology

The invention belongs to the technical field of electric digital data processing and foundation engineering, and discloses a method for calculating stress and displacement of a foundation pile in a soil body under the action of a pile top axial load, which comprises the following steps of: taking the pile top as an origin of coordinates, and taking the downward direction of the longitudinal axis of a pile body as a z axis; according to the basic mechanical equilibrium condition of an infinitesimal body formed by the micro-section length randomly selected in the axial direction of the pile body, the boundary condition of the force at the top end of the pile and the deformation coordination relation between the bottom end of the pile and the foundation, characteristic variables reflecting the pile body stress and displacement distribution mode are solved; and according to the basic mechanical equilibrium condition of the infinitesimal body, the boundary condition of the force at the top end of the pile and the characteristic variables, the pile body axial displacement, the pile body axial force and the pile side surface friction resistance at different depths in the axial direction of the pile body are solved. The rapid and effective method and scientific basis are provided for design calculation and analysis of the foundation pile in the soil body under the action of the axial load of the pile top, and the method has important technical method significance and engineering application value.

The invention relates to a variable-curvature vertical curve pushing fulcrum elevation adjustment optimization method, which comprises the following steps of: taking a bridge midline design datum line as an x axis, and taking a pushing advancing direction as an x-axis positive direction; the vertical direction is used as the z axis, the vertical upward direction is used as the z axis positive direction, the x coordinate represents the longitudinal position of the pushing beam, and the z coordinate represents the distance of the pushing beam deviating from the design datum line; the optimization method comprises the following steps: S1, smooth incremental analysis calculation; s2, fulcrum elevation adjustment; and S3, fulcrum elevation adjustment and integration. According to the method, optimization analysis can be quickly carried out according to existing incremental launching beam body parameters, so that the calculation cost is remarkably reduced, the calculated fulcrum elevation adjustment amount is smaller, and the economic benefit and the construction efficiency are improved.

The invention discloses a method and a system for predicting the axial pressure stable bearing capacity of a trussed column by considering the influence of initial stress and creep, belongs to the technical field of trussed mixed structures, and solves the problem of low precision of predicting the axial pressure stable bearing capacity of the trussed column due to the fact that the influence of initial stress and creep is not considered. The method comprises the steps of determining basic parameters, considering the influence of shear deformation of the trussed column on initial stress, considering the influence of shear deformation of the trussed column on creep, calculating a stability coefficient, calculating the stable bearing capacity of the trussed column and the like. According to the model, an equilibrium differential equation is established based on the mechanics principle, mathematical calculation and derivation are carried out by applying the stability theory, and the influence of shear deformation, initial stress and creep on the axial pressure stable bearing capacity of the truss type column is comprehensively considered, so that the stable bearing capacity prediction method of the truss type column is provided. The method is suitable for predicting the axial pressure stable bearing capacity influenced by the initial stress and creep of the trussed column.

The application discloses a kind of soft soil shield water tunnel composite structure internal force simplified calculation method, comprising the following steps: 1) based on national standard specification and the tunnel overburden soil weight of corresponding geological exploration report of engineering is calculated;2) the underlying soil is simplified into several linear grounding springs connected with water tunnel;3) based on the equivalent stiffness theory of composite beam structure, the equivalent bending stiffness and equivalent shear stiffness of shield water tunnel composite structure are calculated;4) shield water tunnel composite structure is simplified into a continuous homogeneous ironwood Xinke beam in longitudinal direction;5) take microelement dx to carry out stress analysis, and the control equation of simplified model of composite structure is obtained;6) the numerical solution of control equation is solved using finite difference method;7) the numerical solution vector is functionally coupled using Fourier series;8) the internal force of any point on shield water tunnel composite structure is solved.

The invention relates to a reinforced concrete beam bearing capacity evaluation method applied to the technical field of civil engineering. Comprising the steps of performing finite element modeling on a to-be-evaluated beam, performing reduction of different degrees on the area of a tensile steel bar to represent uniform damage of the tensile steel bar, and calculating a bending moment displacement curve at a loading point under a non-destructive working condition and different damage working conditions based on a finite element model. And according to the bending moment displacement curve under each working condition, obtaining the corresponding tensile steel bar yield bending moment under each working condition and the slope of each bending moment displacement curve in the elastic stage, and the like. The bearing capacity of the reinforced concrete beam with uniform damage is quantitatively evaluated by combining simulation data and field actual measurement data, the method has the advantages of being clear in concept and simple and convenient to calculate, and technicians in the field can quickly and accurately evaluate the bearing capacity of the reinforced concrete beam conveniently; powerful support can be provided for bearing capacity evaluation of the in-service reinforced concrete bridge.

The application discloses a kind of stainless steel hollow sandwich steel pipe concrete guide pipe leg shear bearing capacity calculation method, it is related to the technical field of ocean platform guide pipe leg shear performance, comprising the following steps: the size and material parameters of core concrete and inner and outer steel tube are determined;Shear bearing capacity considering the influence of the effect of hoop is calculated;Shear bearing capacity considering the influence of shear span ratio is calculated;Shear bearing capacity considering the influence of axial compression ratio is calculated;The calculation model of stainless steel-concrete-steel hollow sandwich steel pipe concrete guide pipe leg shear bearing capacity is established.The application can accurately predict the stainless steel-concrete-steel hollow sandwich steel pipe concrete guide pipe leg shear bearing capacity, and the expression of calculation formula is only related to cross-section geometric characteristic parameter and component physical characteristic parameter, with clear concept, simple form, strong adaptability characteristics.

The application relates to a method for calculating the speed attenuation coefficient of personnel walking in any direction when a ship body is inclined, and provides a method for calculating the speed attenuation coefficient of personnel walking in any direction when a ship body is inclined (heeled or tilted), which is reliable in theory, clear in concept and easy to realize, and can be used for calculating the walking speed of personnel on a ship (especially a passenger ship) in any direction when the ship body is inclined, so as to provide reasonable basic data for calculating the escape and evacuation time of personnel on the ship, reasonably planning the evacuation path and escape exit of personnel on the ship.

The application discloses a reinforced concrete column and a method for improving the bearing reliability robustness of the reinforced concrete column, and the reinforced concrete column comprises a concrete base body and a steel reinforcement cage arranged in the concrete base body; a compression-weakening connecting device arranged in the concrete base body is arranged in the longitudinal direction; the compression-weakening connecting device comprises upper end reinforcement, lower end reinforcement, middle reinforcement with a pier head at both ends, an upper connector, a lower connector and an isolation layer wrapped outside the middle pier head reinforcement; the two pier head ends of the middle reinforcement are respectively located in the upper connector and the lower connector and can slide in the upper connector and the lower connector. The application effectively solves the problem that the traditional reinforced concrete column axial force-bending moment correlation curve has a positive correlation section, thereby causing poor bearing reliability robustness, improves the bearing reliability robustness of the reinforced concrete column, and is suitable for concrete structure columns with significant eccentricity variation.

The invention discloses an ecological environment zoned pollution and carbon reduction management and control method based on a carbon-pollution cooperative pressure index, and the method comprises the following steps: S1, constructing a carbon-pollution integrated emission grid, and calculating the carbon emission, pollutant emission and environmental bearing capacity load coefficient of each grid; s2, calculating a carbon-pollution cooperative pressure index of each grid according to the carbon emission, the pollutant emission and the environmental bearing capacity load coefficient; and S3, dividing management and control areas according to the carbon-pollution cooperative pressure index, and taking different management and control measures for different levels of management and control areas. According to the method, the complex environmental system pressure can be quantified into a comprehensive index, so that objective and scientific conversion from multi-source data to an accurate management and control strategy is realized, and technical support is provided for ecological environment partitioned pollution and carbon reduction management and control.