A Calculation Method for Segment Heterogeneous Equivalent Beam Element Model Structure of Shield Tunnel

A technology of shield tunnel segment and calculation method is applied in the field of effective beam element model structure calculation, which can solve the problems of waste, increased safety risk, and lack of mature theoretical basis for spring coefficient.

CN103593553BActive Publication Date: 2017-01-25CENT SOUTH UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2017-01-25

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Abstract

The invention discloses a shield tunnel segment non-homogeneous equivalent beam element model structural calculation method. The method includes the steps that firstly, basic data are collected, a routine method model is established, calculation is carried out, and the values of internal force of the section of each joint is extracted; secondly, equivalent section mechanical parameters are calculated; thirdly, a non-homogeneous equivalent beam element model is established, and structural calculation is carried out; fourthly, equivalent section parameters are calculated again; fifthly, the equivalent section mechanical parameters input in the third step are compared with the section mechanical parameters output in the fourth step, whether the comparison result meets error precision requirements or not is judged, and if not, the third step is executed, iterative calculation is carried out again, and the third step, the fourth step and the fifth step are repeated. The calculation model adopted in the method is more approximate to the truth, and calculation results are more accurate.
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Description

Technical field:

[0001] The invention relates to a calculation method for a shield tunnel segment structure, in particular to a calculation method for a shield tunnel segment heterogeneous equivalent beam unit model structure. Background technique:

[0002] During the design, construction and operation of shield tunnels, how to calculate the internal force of shield tunnel segment structures is a current research hotspot and difficulty. In recent decades, with the large-scale development of urban rail transit, the calculation model research for shield tunnel segment structure has made great progress and progress, including homogeneous ring model, equivalent stiffness ring model, A variety of computational structural models including free-hinged ring model, beam-spring model and beam-joint model. However, due to the complexity of the structure itself and the environment in which it exists, there are still some deficiencies and defects in several models currently used in the ...

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Embodiment Construction

[0045] The present invention will be further described below in conjunction with accompanying drawing and specific embodiment:

[0046] (1) Using the idiomatic model ( figure 1 ) to establish the calculation model of the shield tunnel segment structure, calculate the loads, that is, the model boundary, according to the requirements of relevant specifications, and perform calculations to extract the internal force values ​​of each joint section-bending moment M and axial force N.

[0047] (2) According to the force type and internal force value of the equivalent section of the joint, calculate the mechanical parameters of the equivalent section, that is, the height h' of the equivalent compression zone of concrete, the width b' of the equivalent compression zone, and the equivalent elastic modulus E' e . Under different stress types, the calculation formula of equivalent mechanical parameters is as follows:

[0048] ①Positive bending moment and small eccentric compression ( ...