考虑锈蚀钢筋屈曲效应的RC柱抗震性能数值模拟  

Numerical simulation study on the seismic performance of RC columns considering thebuckling effect of corroded reinforcement

作　　者：刘沛尧 李良松 LIU Peiyao;LI Liangsong(China Three Gorges University,Yichang 443002 China;Ganxi Vocational Institute of Science and Technology,Xinyu 338000 China;Pingxiang University,Pingxiang 337000 China)

机构地区：[1]三峡大学防灾减灾湖北省重点实验室,湖北宜昌443002 [2]三峡大学土木与建筑学院,湖北宜昌443002 [3]赣西科技职业学院,江西新余338000 [4]萍乡学院海绵城市研究院,江西萍乡337000

出　　处：《新余学院学报》2025年第2期56-66,共11页Journal of Xinyu University

基　　金：江西省教育厅科学技术研究项目“基于DPSIR理念的海绵城市防洪减涝模型及其应用研究”(GJJ2208101);江西省科技计划项目“萍乡海绵城市雨洪调蓄与水处理系统研究”(PY2023001)。

摘　　要：结合纵筋受压非线性本构模型及受压等效屈曲长度计算理论,建立了考虑锈蚀钢筋屈曲效应的钢筋混凝土柱模型,并与试验结果进行了对比分析。研究结果表明:考虑锈蚀钢筋屈曲效应的钢筋混凝土柱延性系数与耗能模拟平均误差相对不考虑屈曲效应的更小,误差分别降低了10.09%、8.16%;锈蚀率从0%提升到15%时,钢筋混凝土柱的屈服位移、极限位移、延性系数降低幅度可达28.78%、40.91%、22.97%;轴压比在一定范围内增大能增强锈蚀钢筋混凝土柱的承载能力,但超过某一临界值时,锈蚀钢筋混凝土柱承载能力会呈现下降趋势;当剪跨比从3增大到5时,锈蚀钢筋混凝土柱的屈服荷载、极限荷载呈现下降趋势,而屈服位移、极限位移呈现上升趋势,延性系数最高增大了29.49%。By integrating a nonlinear constitutive model of longitudinal reinforcement under compression and the theory of calculating equivalent buckling length under compression,a reinforced concrete column model considering the buckling effect of corroded reinforcement was established and comparatively analyzed with experimental results.The research results indicate that the ductility coefficient and energy dissipation simulation of the reinforced concrete column considering the buckling effect of corroded reinforcement exhibit smaller average errors compared to those neglecting the buckling effect,with error reductions of 10.09%and 8.16%respectively.When the corrosion rate increases from 0%to 15%,the reductions in yield displacement,ultimate displacement,and ductility coefficient of reinforced concrete columns can reach 28.78%,40.91%,and 22.97%respectively.While the axial compression ratio enhances the bearing capacity of corroded reinforced concrete columns within a certain range,exceeding a critical threshold leads to a declining trend in load-bearing capacity.As the shear span ratio increases from 3 to 5,the yield load and ultimate load of corroded reinforced concrete columns show decreasing trends,whereas the yield displacement and ultimate displacement demonstrate increasing trends,with the ductility coefficient achieving a maximum increase of 29.49%.

关 键 词：锈蚀钢筋混凝土柱 钢筋屈曲 混凝土破坏 抗震性能 

分 类 号：TU375.3[建筑科学—结构工程]