|Table of Contents|

Stress analysis of eccentric compression reinforced concrete component based on optimization algorithm and secondary development of ANSYS(PDF)

长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]

Issue:
2025年01期
Page:
92-101
Research Field:
桥梁与隧道工程
Publishing date:

Info

Title:
Stress analysis of eccentric compression reinforced concrete component based on optimization algorithm and secondary development of ANSYS
Author(s):
GAO Qiong1;  LIU Guo-kun2;  LIU Qi3
(1. School of Civil Engineering, Hunan City University, Yiyang 413000, Hunan, China; 2. School of Architectural Engineering, Hunan Institute of Engineering, Xiangtan 411104, Hunan, China; 3. Shandong Provincial Communications Planning and Design Institute Group Co. Ltd., Jinan 250101, Shandong, China)
Keywords:
bridge engineering;  eccentric compression comporment;  optimization algorithm;  secondary development of ANSYS
PACS:
U411
DOI:
10.19721/j.cnki.1671-8879.2025.01.008
Abstract:
In order to accurately calculate the sectional stress of reinforced concrete eccentric compression members with different sections, a methodology based on optimization algorithm was proposed, which can take into account the stress redistribution effect of the section after the concrete in the tension zone withdraw from work. Firstly, the parameters of the neutral axis equation were taken as optimization variables, and the difference between the resistance moment of the cross section provided by the concrete and all the steel bars in the compression zone and external load was taken as the objective function. Then, according to the proposed stress calculation methodology, a FORTRAN program was complied, and 7 different types of cross sections were taken as examples to verify the optimization methodology and the corresponding program. Finally, the stress calculation program was complied and connected into the user command subroutine provided by the finite element program ANSYS UPFs for secondary development to realize the section stress calculation function of beam element simulation of reinforced concrete members. The results show that the difference between the external load and the section resistance moment of the example is small, and the optimization algorithm can calculate the section stress with high precision. The program can be used to calculate the stress redistribution of the bidirectional eccentric compression member with arbitrary section, and has strong universality. After the secondary development, ANSYS program can greatly improve the efficiency of the sectional stress analysis with a large number of load steps. The method of establishing optimization mathematical model and realizing custom function in ANSYS secondary development can provide reference for solving similar engineering problems.2 tabs, 8 figs, 27 refs.

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Last Update: 2025-02-25