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Abstract

Looking for alternative steel under different standard systems to ensure the orderly progress of engineering projects is an engineering problem that needs to be faced in the field of overseas civil engineering construction. In order to evaluate the substitutability of the European standard IPE 200 I-beam and the national standard I20a I-beam in the initial support structure of the tunnel, a mechanical model of the initial support structure of the tunnel was first established, and the model parameters were calibrated using the measured test data, so as to obtain the analytical solution of the internal forces of the initial support structure corresponding to the two types of I-beams. Furthermore, the substitutability of the two types of I-beams in the initial support structure of the tunnel was compared by taking the bending moment, axial force, and shear stress as evaluation indexes. The results show that the internal force distribution of the initial support structure does not change after the exchange of the two types of I-beams, but an acceptable multiple relation is generated in numerical value. When replacing the national standard I20a I-beam with the European standard IPE200 I-beam, it is necessary to ensure the construction quality of the arch top and arch foot, and some strengthening measures can be assisted if necessary.

Publication Date

11-24-2023

DOI

10.14048/j.issn.1671-2579.2023.05.031

First Page

182

Last Page

187

Submission Date

March 2025

Reference

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