Calculation method of transverse distribution coefficient of single-box and multiple-chamber wide girder bridge

Abstract

The invention provides a calculation method, based on a modal analysis method, of the transverse distribution coefficient of a single-box and multiple-chamber wide girder bridge. The sensitivity factor and the sensitivity level of the transverse distribution coefficient of the wide bridge are determined by universal limit element software. Heavy numerical simulation is performed through parameterized programming for analysis, a simplified calculation method applicable to the transverse distribution coefficient of the wide bridge is obtained through solid model comparison, model tests, field tests and other contrasts, convenience is brought to design of the wide bridge, the project design quality can be improved, and the calculation method plays active roles in raising the refined design level of the wide box girder bridge, guaranteeing the structural durability of the bridge, reducing bridge diseases and reasonably controlling the project cost.

Description

technical field [0001] The invention belongs to the field of highway and bridge structures, and specifically relates to a method for calculating the lateral distribution coefficient of a single-box multi-chamber wide beam bridge based on a modal analysis method. Background technique [0002] In order to meet the increasing traffic flow, wide-girder bridges are mostly built among small and medium-span bridges in cities. The width of the bridge is similar to the span, or even exceeds the span, so the mechanical performance and characteristics of the structure are more complicated. At present, the design and calculation methods for wide girder bridges in engineering design are to establish a space bar system model (beam lattice) or to establish a solid element finite element model for analysis. The calculation accuracy of the former is generally not as good as that of solid elements, but it can meet the needs of engineering design, but It simplifies the original structure beyo...

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Problems solved by technology

There are relatively few relevant studies on wide-girder bridges, and they cannot reach the level of guiding design

[0004] The research results of Peng Deyun, Wang Lei, etc. take specific bridges as the research background, and the research results only propose specific empirical values ​​for the lateral distribution coefficient for a certain bridge, which cannot be widely extended to actual engineering design

Guo Yi, Wang Yong, An Liyong and others studied the influence of bridge span and width on the lateral distribution coefficient of bridges, and revised the existing calculation formulas of small box girder bridges. The calculation formulas proposed are not consistent, and the calculation results are also different. In the actual calculation, it is found that there are different degrees of deviation in the calculation results of wide bridges with different spans and widths

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