底部加强钢管再生混凝土叠合柱抗震性能研究  

STUDY ON SEISMIC PERFORMANCE OF BOTTOM STRENGTHENED STEEL TUBE RECYCLED CONCRETE COMPOSITE COLUMNS

作　　者：曾智祥 刘猛 黄磊 ZENG Zhixiang;LIU Meng;HUANG Lei(School of Civil and Architectural Engineering,Liaoning University of Technology,Liaoning Jinzhou 121001,China;Shenyang Huaxin International Construction Designers and Consultants Co.,Ltd.Fuxin Branch,Liaoning Fuxin 123000,China)

机构地区：[1]辽宁工业大学土木建筑工程学院,辽宁锦州121001 [2]沈阳华新国际工程设计顾问有限公司阜新分公司,辽宁阜新123000

出　　处：《低温建筑技术》2024年第12期144-149,共6页Low Temperature Architecture Technology

摘　　要：为研究底部加强矩形钢管再生混凝土叠合柱抗震性能,文中利用有限元软件ABAQUS建立了7根叠合柱的低周反复加载模型。针对再生粗骨料取代率、再生混凝土强度等级和轴压比3种因素对柱的抗震性能影响规律展开分析。研究结果表明,各试件滞回曲线均较为饱满,表现出较好的耗能能力。随着再生粗骨料取代率的增大,叠合柱峰值水平承载力减小,延性降低,初始刚度减小。但整体看来,再生粗骨料取代率对叠合柱的抗震性能影响较小。随着再生混凝土强度等级提高,叠合柱峰值水平承载力增大,延性降低,初始刚度增大。随着轴压比的增大,叠合柱峰值水平承载力减小,延性降低,初始刚度减小。这表明轴压比的增大会导致叠合柱抗震性能下降。To investigate the seismic performance of bottom-reinforced rectangular steel tube recycled concrete composite columns,a low-cycle repeated loading model of seven composite columns was established using the finite element software ABAQUS.The study analyzed the influence of three factors-recycled coarse aggregate replacement rate,recycled concrete strength grade,and axial load ratio-on the seismic performance of the columns.The results indicate that the hysteresis curves of all specimens were relatively full,demonstrating good energy dissipation capacity.As the recycled coarse aggregate replacement rate increased,the peak horizontal load capacity of the composite columns decreased,ductility reduced,and initial stiffness decreased.However,overall,the impact of the recycled coarse aggregate replacement rate on the seismic performance of the composite columns was small.As the strength grade of recycled concrete increased,the peak horizontal load capacity of the composite columns increased,ductility decreased,and initial stiffness increased.With an increase in axial load ratio,the peak horizontal load capacity of the composite columns decreased,ductility reduced,and initial stiffness decreased.This indicates that an increase in the axial load ratio leads to a decline in the seismic performance of the composite columns.

关 键 词：矩形钢管 再生混凝土 叠合柱 有限元分析 抗震性能 

分 类 号：TU528.7[建筑科学—建筑技术科学]