Method for quickly evaluating transverse force transmission capacity of hollow slab girder bridge hinge joint

Abstract

The invention discloses a method for quickly evaluating the transverse force transmission capacity of a hollow slab girder bridge hinge joint. The method comprises: firstly, measuring points are arranged on the two sides of a hinge joint of the hollow slab girder bridge; further, the relative vertical deflection of the measuring point position in the load test is obtained; substituting the proposed hinge joint rotation stiffness calculation formula and the proposed hinge joint shear stiffness calculation formula, solving the actually measured rotation stiffness and the actually measured shearstiffness of the hinge joint as evaluation indexes of the hinge joint transverse force transmission capacity, and quickly evaluating the hinge joint transverse force transmission capacity according todifferent threshold ranges of the proposed evaluation indexes. The method can also be used in related standard systems for bridge reinforcement, that is, the hollow slab bridge hinge joint is rapidlyevaluated through the method, and the degree of beam reinforcement needing to be carried out is judged according to the evaluation result.

Description

technical field [0001] The invention relates to the technical field of bridge construction engineering, in particular to a rapid evaluation method for the transverse force transmission capacity of hinge joints of hollow slab girder bridges. Background technique [0002] Among the highway and bridge construction projects in my country, the prefabricated hollow slab girder bridge was applied the earliest. As a low-slung building bridge, it has the advantages of simple structure, clear force, convenient construction, and high clearance under the bridge. It is a very economical bridge structure and has been widely used in 8-25m span bridges. According to statistics, the application proportion of hollow slab girder bridges in most highways is greater than 50%, and some even reach more than 90% (including main lines, ramps and overspan bridges). Highway management and maintenance work is particularly important. [0003] However, with the continuous increase of service time, the ...

AI Technical Summary

Problems solved by technology

Hinge joint disease or damage is a manifestation of the appearance of the structure. If there is a lack of relevant knowledge reserves on the relationship between the appearance of the structure and the internal mechanical state of the structure, it is still difficult for the maintenance personnel to determine the service state of the structure based only on the inspection results of the appearance. Make correct assessments and take targeted measures

In addition, these diseases are closely related to time factors. Although some scholars have used laboratory accelerated tests or finite element analysis techniques to take into account the influence of time factors on structures, it is still difficult to simulate the real effects of long-term service on structures and cannot ensure the accuracy of the analysis. validity and plausibility of the data

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