含钢筋锈坑混凝土梁抗冲击性能数值模拟研究  

Numerical Simulation of Impact Resistance of Concrete Beams With Reinforced Rust Pits

作　　者：潘颉 陶俊林[1] 李洪祥[1] PAN Jie;TAO Junlin;LI Hongxiang(College of Civil Engineering and Architecture,Southwest University of Science and Technology,Mianyang Sichuan 621010,China)

机构地区：[1]西南科技大学土木工程与建筑学院,四川绵阳621010

出　　处：《安全》2025年第3期40-47,共8页Safety & Security

摘　　要：为研究锈蚀钢筋混凝土梁抗冲击性能,本文采用数值模拟方法,从锈蚀率、冲击速度、锈蚀钢筋数量与位置等方面进行分析,抗冲击性能主要从跨中位移、冲击力等进行表征。结果表明:冲击速度为5 m/s时,锈蚀率从0%增加到15%,梁的跨中位移增加11.85%,即跨中位移随着锈蚀率的增加而增加;锈蚀率为10%,冲击速度为3~7 m/s时,梁跨中位移峰值增加了4.1%~7.7%;冲击持续时间随着冲击速度的增加而增加,在每一个速度下,锈蚀后冲击持续时间增加了4.84%左右。钢筋锈蚀会导致钢筋混凝土梁抗冲击性能减弱,研究成果可为锈蚀钢筋混凝土结构的加固提供参考。To study the impact resistance of corroded reinforced concrete beams,this paper adopts a numerical simulation method and analyzes aspects such as corrosion rate,impact velocity,number and position of corroded rebars.The impact resistance is mainly characterized by mid-span displacement and impact force.The results show that at 5 m/s impact velocity,0%~15%increase in corrosion rate leads to an 11.85%growth in mid-span displacement,so mid-span displacement rises with the corrosion rate.When the corrosion rate is 10%and impact velocity is 3~7 m/s,the mid-span displacement peak increases by 4.1%~7.7%.Impact duration increases with the increase of impact velocity.At each velocity,the impact duration after corrosion increased by about 4.84%.Rebar corrosion weakens the impact resistance of reinforced concrete beam,and the findings can guide the reinforcement of corroded structures.

关 键 词：锈蚀钢筋混凝土梁 冲击荷载 锈坑 抗冲击性能 数值模拟 

分 类 号：TU3[建筑科学—结构工程]