A method for adding a spring unit to a concrete filled steel tube finite element model

A technology of steel tube concrete and spring elements, applied in special data processing applications, instruments, geometric CAD, etc., can solve problems such as complex operations and low efficiency, and achieve the effect of improving work efficiency

Active Publication Date: 2019-03-08
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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Problems solved by technology

[0010] Aiming at the problem that the bond-slip performance of CFST structure is complex and inefficient in finite element simulation analysis, the purpose of the present invention is to propose a method for adding spring elements in the CFST finite element model

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  • A method for adding a spring unit to a concrete filled steel tube finite element model
  • A method for adding a spring unit to a concrete filled steel tube finite element model
  • A method for adding a spring unit to a concrete filled steel tube finite element model

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Embodiment Construction

[0044] The research train of thought of the present invention is as follows: first utilize ABAQUS finite element software to set up the finite element model that does not consider the bond-slip characteristic of steel pipe and concrete interface and generate the inp format file of this model; Secondly, the inp format file can be compiled by Python language A general program for a series of processing, automatically adding the spring unit to the inp format file according to ABAQUS's format and position requirements; finally submit the modified inp format file to the Job.

[0045] This embodiment follows the technical scheme of the present invention, and takes the test specimen RCA in the document "Study on the Bonding Performance of Steel Tubes and Regenerated Concrete" as an example to perform finite element analysis, specifically including the following steps:

[0046] (1) Establish the finite element model of the steel pipe and recycled concrete. At this time, the interaction...

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Abstract

The invention discloses a method for adding a spring unit to a concrete-filled steel tube finite element model. The method comprises the following steps of step 1 establishing the concrete-filled steel tube finite element model; step 2 performing grid division on the steel pipes and the concrete; step 3 storing a. Inp file of the finite element model; step 4 extracting node numbers and coordinateinformation of the steel pipe component and the concrete component; step 5 storing the extracted information into a txt format file 1; step 6 reading the txt format file 1 and storing the txt format file 1 into the csv format file 1, then creating a list, storing four numbers in each line of the csv format file 1 into a sub-list, and storing all the sub-lists into the list; step 7 creating an Excel table to obtain spring unit contents meeting ABAQUS format requirements; step 8 obtaining an inp file added with a spring unit; and step 9 submitting the inp file added with the spring unit. According to the invention, the addition of the spring unit can be automatically, efficiently and accurately completed, thereby providing a finite element simulation analysis service for the test related tothe bonding slip performance of the concrete filled steel tube.

Description

technical field [0001] The invention mainly relates to the fields of architecture and civil engineering, and relates to a method for adding a spring unit in a finite element model of steel pipe concrete. Background technique [0002] The steel tube concrete structure is composed of steel tubes and concrete, two materials with different mechanical properties. In the combined steel tube concrete structure, the high tensile properties of steel and the high compressive properties of concrete can be fully obtained simultaneously use. Compared with ordinary reinforced concrete structures, it has the advantages of high bearing capacity, strong seismic performance and simple construction, and is widely used in building structures. [0003] The reuse of construction waste is in line with the national policy of ecological civilization construction. Among them, recycled concrete has become the focus of research in recent years because of its advantages of energy saving, land saving, a...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/13G06F30/23
Inventor 白国良刘彪秦朝刚
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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