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A whole-process slippage calculation method for an assembly type shear connector

A calculation method and assembly technology, applied in calculation, special data processing applications, instruments, etc., can solve the problems affecting calculation accuracy and structural safety, calculation errors of composite beam stiffness and bearing capacity, and small slip calculation results, etc. problems, to achieve the effect of ensuring calculation accuracy and structural safety, correct calculation, and accurate slip calculation results

Active Publication Date: 2019-06-25
CHONGQING JIAOTONG UNIVERSITY
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AI Technical Summary

Problems solved by technology

The slip of the composite beam will increase. If this effect is not considered, the calculation result of the slip will be too small, and the calculation error of the stiffness and bearing capacity of the composite beam will be too large, which will affect the calculation accuracy and structural safety.

Method used

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  • A whole-process slippage calculation method for an assembly type shear connector
  • A whole-process slippage calculation method for an assembly type shear connector
  • A whole-process slippage calculation method for an assembly type shear connector

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Embodiment

[0050] Referring to Tables 3-7, 3-8, 3, 3-10, a calculation method for slippage in the whole process of fabricated shear connectors, the calculation method includes the following steps:

[0051] S1, determine the geometric parameters of the assembled composite beam section, the analytical formula of the plate height is:

[0052]

[0053] where: ε ct Calculate the nominal tensile strain for concrete; ε p0 is the precompressive strain at the edge of the concrete slab; ε t is the ultimate tensile strain of concrete;

[0054] S2. According to the balance relationship of the internal force of the composite beam in the micro-segment, the static balance equation of the concrete slab and the steel beam in the micro-segment is established:

[0055]

[0056] S3, establish the curvature calculation equation of steel truss beam and concrete slab:

[0057]

[0058] S4, establish the slip-shear stress relationship calculation formula:

[0059]

[0060] S5, the slip-load dif...

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Abstract

The invention discloses an assembly type shear connector whole-process slip calculation method, which comprises the following steps: S1, determining assembly type composite beam section geometric parameters and a plate height analytical expression: epsilonct is nominal tensile strain calculated for concrete; epsilonP0 is the prepressing strain of the upper edge of the concrete slab; epsilont is concrete limit tensile strain; And S2, according to the balance relation of the internal force of the composite beam in the microsection. The invention has the advantages that: with the increase of load, the slippage is also increased; In different stages, the cracking slip increment increase speed is increased along with load increase, and obvious nonlinearity is shown; Precast concrete bridge roadslab joints of the tension area of the fabricated composite beam crack, so that the slippage of the composite beam is increased compared with that of a conventional composite beam, the influence is considered, the slippage calculation result is accurate, the rigidity and the bearing capacity of the composite beam are calculated without errors, the result is accurate, and the result calculation precision and the structural safety are guaranteed.

Description

technical field [0001] The invention relates to the technical field of civil engineering, in particular to a method for calculating the slip of an assembled shear connector in the whole process. Background technique [0002] The slip calculation of existing stud shear connectors in steel-concrete composite beams is usually for the integrated concrete bridge slab composite structure of conventional cast-in-place construction. Based on the continuous force of the structure, the concrete slab in the micro-segment beam is established And the static equilibrium differential equation of the steel beam, and according to the slip constitutive and boundary conditions, the analytical formula of the slip distribution of the stud-shear connection in the beam under various loads is obtained. [0003] The above methods do not consider the steel-concrete composite girder bridge with prefabricated construction, and the cracking and even failure characteristics of the prefabricated bridge sl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 高燕梅
Owner CHONGQING JIAOTONG UNIVERSITY
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