基于ABAQUS的负载下碳纤维布受弯工字形钢梁有限元分析

Theoretical Study on Flexural Members of Steel Structures Strengthened with CFRP under Load

随着软件有限元模拟技术和经济的不断发展,ABAQUS软件作为工程应用中大型有限元软件,经过有限元分析,均清晰地对问题进行了诠释。论文基于ABAQUS有限元软件,分析模拟研究了负载下,不同加固参数对加固受弯工字形钢梁力学性能的影响,为工程实际提供参考借鉴作用。具体结论主要为以下几点。不同负载水平(负载0%、30%、45%、60%、70%)的钢梁,加固参数相同,试件组合体承载力有限元模拟值与试验值误差在5%以内,吻合良好。负载水平不同,其最终破坏荷载也不尽相同,荷载挠度曲线规律相似,但负载水平的提高而破坏荷载有所下降。负载条件不同,不同加固层数下的荷载-挠度曲线近似相近,试件承载力与加固层数呈正比,但加固层数至一定程度,承载力增长幅度基本呈平稳趋势。当加固层数达到两层时,加固效果良好。随着改变碳纤维布长度,其荷载-挠度曲线规律基本相似,且随着碳纤维长度的增加,承载力也有一定提高。

With the continuous development of software finite element simulation technology and economy,ABAQUS software,as a large-scale finite element software in engineering application,has clearly explained the problems through finite element analysis.Based on ABAQUS finite element software,this paper analyzes and simulates the influence of different reinforcement parameters on the mechanical properties of strengthened I-shaped steel beams under load,so as to provide reference for engineering practice.The specific conclusions are as follows.For steel beams with different load levels(load 0%,30%,45%,60%,70%),the reinforcement parameters are the same,and the error between the finite element simulation value and the test value is 5%.The ultimate failure load is different with different load levels,and the law of load deflection curve is similar,but the failure load decreases with the increase of load level.Under different load conditions,the load deflection curves under different reinforcement layers are approximately similar,and the bearing capacity of the specimen is directly proportional to the number of reinforcement layers,but when the number of reinforcement layers reaches a certain degree,the growth range of bearing capacity basically shows a stable trend.When the number of reinforcement layers reaches two,the reinforcement effect is good.With the change of the length of carbon fiber cloth,the law of load deflection curve is basically similar,and the bearing capacity also increases with the increase of the length of carbon fiber cloth.