摘要
我国建筑、桥梁等结构大多已接近使用年限,亟需加固改造。为解决新旧接触界面易产生剥离、新加结构与原有部分无法共同受力的问题,改善传统加固方法,采用FRP网格-UHPC复合加固钢筋混凝土梁。用ABAQUS有限元软件进行数值模拟分析,模拟结果与试验结果吻合较好,能够准确模拟FRP网格增强超高性能混凝土(UHPC)复合加固钢筋混凝土梁的抗弯性能。分析FRP网格横、纵向结点数和复合加固层粘结长度等参数对加固梁受弯性能的影响,结果显示,随着粘结长度的增加,加固效果提升显著,承载力最大提升幅度为121.929%;通过增加横向网格结点数,可以有效地增强FRP网格与UHPC之间的机械锚固能力,从而使承载力提升。研究成果为FRP网格-UHPC加固混凝土结构提供参考。
Most of China's buildings,bridges,and other structures are in the last state of their service life and entering a critical period of strengthening and renovation.In order to improve the traditional strengthening methods.Such as bonding resulting in the problem of unable to bear the force.This article is based on ABAQUS finite element software to simulate the RC beams strengthened with FRP gird-UHPC.By comparing and analyzing the simulated and experimental values,it can be seen that the simulation results are in good agreement with the experimental results,which can accurately predict the bending performance of the experimental beams.Therefore,this model was used to study the bending performance of concrete beams reinforced with FRP grid reinforced ultra-high performance concrete(UHPC)composite reinforcement.One control beam and six strengthening beams were studied for bending performance.The simulation parameter variables were the transverse and longitudinal nodes of FRP grid and the bonding length of the composite reinforcement layer.From the numerical simulation analysis results,it can be concluded that as the bonding length increases,the reinforcement effect improves significantly,with a maximum increase in bearing capacity of 121.929%;By increasing the number of transverse grid nodes,the mechanical anchoring capacity between FRP grid and UHPC can be effectively enhanced,thereby improving the bearing capacity.The research can provide the reference for the FRP grid-UHPC strengthening the structures.
作者
王勃
尹雅南
张振
王子诚
WANG Bo;YIN Ya-nan;ZHANG Zhen;WANG Zi-cheng(School of civil engineering,Jilin Jianzhu university,Changchun 130118,China;Changchun Beixing construction development Co.,Ltd.,Changchun 130114,China)
出处
《吉林建筑大学学报》
CAS
2024年第3期1-7,共7页
Journal of Jilin Jianzhu University
基金
吉林省科技计划项目(20240304147SF)
国家重点研发计划项目(2017YFC0806100)
国家自然科学基金项目(51178206)。
