不锈钢-碳素钢筋混合配筋混凝土空心墩柱抗震性能研究  

Study on Seismic Performance of Concrete Hollow Pier Column with Mixed Stainless Steel-Carbon Steel Reinforcement

作　　者：徐春一[1] 李佳莹 牛奔 佟舟[3] XU Chunyi;LI Jiaying;NIU Ben;TONG Zhou(School of Civil Engineering,Shenyang Jianzhu University,Shenyang,China,110168;China Construction Sixth Engineering Bureau Limited Tianjin Rail Transit Branch,Tianjin,China,300000;Department of Civil Engineering,Shenyang Urban Construction,Shenyang,China,110167)

机构地区：[1]沈阳建筑大学土木工程学院,辽宁沈阳110168 [2]中国建筑第六工程局有限公司天津轨道交通分公司,天津300000 [3]沈阳城市建设学院土木工程系,辽宁沈阳110167

出　　处：《沈阳建筑大学学报（自然科学版）》2021年第5期805-813,共9页Journal of Shenyang Jianzhu University：Natural Science

基　　金：国家自然科学基金项目(51808353);辽宁省教育厅服务地方项目(lnfw201905);沈阳建筑大学科研创新培育计划项目(CXPY2017022)。

摘　　要：目的研究混合配筋情况下不锈钢筋与碳素钢筋在混凝土空心墩柱中的协同工作性能。方法利用Abaqus有限元软件建立钢筋混凝土空心墩柱模型,并以已有试验结果验证了模型的适用性。基于所建模型,对不锈钢筋与碳素钢筋混合配筋、全碳素钢筋两种配筋形式下混凝土空心墩柱的抗震性能进行研究。然后扩大试件模型的参数,对不锈钢-碳素钢筋混凝土空心墩柱的抗震性能展开进一步分析。结果各墩柱的破坏均最先发生在柱最底端;两种配筋形式下试件的滞回曲线相似;各试件的刚度相差不大,但混合配筋试件的承载能力和耗能能力更好。由此验证了不锈钢筋-碳素钢筋混合配筋混凝土空心墩柱有良好的综合抗震性能。结论当控制高宽比在4~10、轴压比在0.5~0.7以及纵筋配筋率在1.5%~4.3%时,适当减小高宽比可以提升混合配筋试件的承载力,且降低轴压比、增加纵筋配筋率可提高混合配筋试件的延性。To study the cooperation work performance of stainless steel bar and carbon steel bar in concrete hollow pier columns under mixed reinforcement.The reinforced concrete hollow pier column model was established with using Abaqus finite element software,and the applicability of the analytical model was verified with test results from the literature.Based on the proposed model,the seismic performance of concrete hollow pier columns with two types of reinforcement,mixed reinforcement of stainless steel bars and carbon steel bars and all carbon steel bars were analyzed.After wards,the seismic performance of the stainless steel-carbon steel reinforced concrete hollow pier column was further analyzed with expanding the parameters of the specimen model.The damage of each pier column occurred first at the foot of the column;the hysteresis curves of the specimens were similar in both reinforcement forms;the stiffness of each specimen was similar,but the bearing capacity and energy dissipation capacity of the mixed reinforcement specimens were better.This verifies that the mixed reinforced concrete hollow pier column with stainless steel bar-carbon steel bar has good comprehensive seismic performance.When the depth-width ratio was controlled from 4 to 10,the axial compression ratio was controlled from 0.5 to 0.7 and the longitudinal reinforcement rate was controlled from 1.5%to 4.3%,the load bearing capacity of the mixed reinforcement specimens could be improved by appropriately reducing the depth-width ratio,and the ductility of the mixed reinforcement specimens could be improved by reducing the axial compression ratio and increasing the longitudinal reinforcement rate.

关 键 词：不锈钢筋 混合配筋 不锈钢筋本构模型 有限元模拟 抗震性能 

分 类 号：TU375[建筑科学—结构工程]