Shield tunnel segment non-homogeneous equivalent beam element model structural calculation method
A technology of shield tunnel segment and calculation method, which is applied in the field of structure calculation of effect beam unit model, and can solve the problems of small deformation, waste, and insufficient representation of the influence of joint stiffness in weak strata.
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[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 ( ...
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