PBS system-based pre-bent composite beam Abaqus rapid modeling method

Abstract

The invention relates to a PBS system-based Abaqus rapid modeling method for a pre-bent and pre-stressed composite beam, and belongs to the technical field of three-dimensional finite element modeling of bridge engineering. Designing a PB main beam by using a pre-bending pre-stress composite beam design checking calculation system, and running the main beam Abaqus modeling table in the step 1 by adopting a Python program provided with a third-party library function xlrd2; reading PB main beam parameter information in a PBS generation table file of a pre-bending prestressed composite beam design checking calculation system through a Python program script file; the Python is operated by using Abaqus (Abaqus); a basic model, a steel beam pre-bending model, a pre-bending beam model and a pre-bending composite beam model; and generating a PB beam basic model, a steel beam pre-bending model, a pre-bending beam model and a pre-bending composite beam model corresponding to the design parameters. According to the method, after the PB beam is designed by the pre-bending prestressed composite beam design checking calculation system, the form file is directly exported, the automatic rapid modeling process is achieved, and construction stage analysis, bearing capacity analysis and parameterization analysis of the pre-bending prestressed composite beam are conveniently achieved.

Description

technical field [0001] The invention relates to a PBS system-based Abaqus rapid modeling method for prebent and prestressed composite beams, belonging to the technical field of three-dimensional finite element modeling of bridge engineering. Background technique [0002] At present, due to the rapid development of highways and urban traffic, considering the height limit of bridge construction, durability and other issues, there are fewer suitable bridge types. The pre-bent prestressed composite beam, referred to as pre-bent composite beam, was first proposed in 1949 by A. Lipski of Belgium. The structure is to pour the first-stage concrete and the second-stage concrete such as the web and bridge deck on the pre-bent I-shaped steel beams, so as to apply precompressive stress to the first-stage concrete in the tension area by using the rebound effect of the steel beams. The pre-bending prestressed combination has the following main characteristics: 1) small building height; 2...

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Problems solved by technology

[0004] For pre-bent prestressed composite beams, after the design is completed, it is cumbersome to simulate the stress in the construction stage by staged modeling, and when there are many models or parametric modeling is required, it is time-consuming to re-modify the model multiple times

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