预应力高强钢绞线加固RC梁抗弯性能有限元分析  

Finite element analysis of flexural performance of RC beams strengthened by prestressed high strength steel strand

作　　者：李妍[1] 田雨阳 LI Yan;TIAN Yu-yang(School of civil engineering,Jilin Jianzhu university,Changchun 130118,China)

机构地区：[1]吉林建筑大学木工程学院,长春130118

出　　处：《吉林建筑大学学报》2021年第2期24-28,共5页Journal of Jilin Jianzhu University

基　　金：吉林省科技发展计划项目(20200403161SF).

摘　　要：为研究预应力高强钢绞线加固后的RC简支梁的抗弯性能,本文基于ABAQUS有限元模拟软件建立了4组不同工况的RC简支梁,以体外预应力加固方式对其进行加固,并模拟其受力过程.以预应力度为控制变量,研究高强钢绞线对RC梁的抗弯加固效果.分析结果表明,预应力高强钢绞线对混凝土梁的抗弯效果可以起到明显提升作用,梁底跨中区域裂缝减少,极限承载力增加,且随着预应力度的提高,构件的加固效果愈加明显.In order to study the flexural performance of RC simply supported beams strengthened with prestressed high-strength steel strand,four groups of RC simply supported beams under different working conditions are established based on ABAQUS finite element simulation software,and the external prestressing reinforcement method is used to reinforce them,and the stress process is simulated.Taken the prestressing force as the control variable,the flexural strengthening effect of high strength steel strand on RC beams is studied.The analysis results show that prestressed high-strength steel strand can significantly improve the flexural effect of concrete beams,reduce the cracks in the middle span of the beam bottom,and increase the ultimate bearing capacity.With the increase of the prestressing force,the strengthening effect of the members becomes more obvious.

关 键 词：预应力 钢绞线 加固 抗弯性能 

分 类 号：TU391[建筑科学—结构工程]