Comprehensive evaluation method for bearing capacity of in-service hollow slab girder bridge

Abstract

The invention discloses a comprehensive evaluation method for the bearing capacity of an in-service hollow slab girder bridge. The method comprises the following steps: step a, collecting analysis data; b, processing the collected data, and converting to obtain the maximum elastic strain, the maximum elastic deflection, the residual strain and the residual deflection; c, test evaluation parameters are calculated, and evaluation parameters including strain and deflection check coefficients, strain and deflection relative residues and strain and deflection deviation coefficient standard deviations are calculated; d, comprehensively evaluating the bearing capacity to obtain a conclusion; evaluation parameters of test results meet the conditions that the strain and deflection check coefficients are smaller than 1, the strain and deflection relative residues are smaller than 20%, the strain and deflection deviation coefficient standard deviation is smaller than 15%, it is judged that the structural strength, rigidity, the original state recovery capacity and the transverse relation are all in a safe state, and the overall upper load bearing performance of the bridge is good. According to the method, comprehensive evaluation of the bearing capacity of the in-service hollow slab girder bridge is effectively realized.

Description

technical field [0001] The invention relates to the field of bridge detection, evaluation and reinforcement, in particular to a comprehensive evaluation method for the bearing capacity of an in-service hollow slab girder bridge. Background technique [0002] In my country's highway and urban bridge operation system, more than 90% of the bridges are small and medium-span bridges. Among them, hollow slab girder bridges have become one of the preferred bridge types for small and medium-span bridges due to their simple structure, clear stress state, easy prefabrication, and easy control of beam quality. [0003] However, the weak lateral connection of hollow slab girder bridges leads to poor lateral force transmission between girder slabs and even single slab stress during operation. The existing research results and engineering technical means have put forward a variety of solutions to the problem of weak lateral force transmission between hollow slab beams, and repair and str...

AI Technical Summary

Problems solved by technology

This evaluation method is satisfied with the evaluation of the load-carrying capacity of each independent beam and slab, but the overall evaluation composed of each beam and slab is not properly considered, that is, the work performance of the transverse force transmission structure between the beam and slab (hereinafter referred to as the hinge joint) is not considered

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