低周反复荷载作用下SFCBs-RPC框架力学性能分析  

Studyon mechanical performance of SFCBs-RPC frame under low cyclic loading

作　　者：罗来勇 姚子豪 姚山 葛文杰[2] Ashraf Ashour Luo Laiyong;Yao Zihao;Yao Shan;Ge Wenjie;Ashraf Ashour(Jiangsu Yangjian Group Co.Lid,Yangzhou 225002,China;College of Civil Science and Engineering Yangzhou University,Yangzhou 225127,China;Gansu Engineering Design&Research Institute Limited Liability Company,Lanzhou 730030,China)

机构地区：[1]江苏扬建集团有限公司,江苏扬州225002 [2]扬州大学建筑科学与工程学院,江苏扬州225127 [3]甘肃省工程设计研究院有限责任公司,甘肃兰州730030

出　　处：《建筑科学》2024年第5期56-66,77,共12页Building Science

基　　金：科技部“高端外国专家引进计划”项目(G2022014054L);扬州市科技计划项目-市校合作专项(YZ2022194);甘肃省建设科技计划项目(JK2021-19);2022年度(下半年)江苏省土木建筑学会科研课题;扬州市建设科技计划项目(202312)。

摘　　要：为研究低周反复荷载作用下钢-FRP复合筋(steel-FRP composite bar,SFCB)活性粉末混凝土(reactive powder concrete,RPC)框架力学性能,基于有限元软件ABAQUS对一榀钢筋混凝土框架在低周反复荷载作用下的力学性能进行分析,模拟结果与试验吻合性良好。在此基础上,建立SFCBs-RPC框架模型,分析混凝土强度、轴压比及柱纵筋配筋率对SFCBsRPC框架抗震性能的影响。结果表明,SFCB-RPC框架相比钢筋RPC框架具有良好的二次刚度,屈服后承载力提升明显且残余变形率更小,具有良好的变形恢复能力和延性;RPC框架相比普通混凝土框架拥有更高的承载力和延性;框架延性随轴压比和柱纵筋配筋率的增大而降低;SFCBs-RPC框架总体呈现良好延性。In order to study the mechanical properties of reactive powder concrete(RPC)frames reinforced with steel-FRP composite bars(SFCBs)under low reversed cyclic loading,a steel reinforced normal concrete frame is established by finite element software ABAQUS and its mechanical properties under low reversed cyclic loading is analyzed.The simulate results are in good accordance with experimental results.Then the models of SFCBs reinforced RPC frame are established,the effects of concrete strength,axial compression ratio and column longitudinal reinforcement ratio on seismic performance of SFCBs-RPC frames are investigated.The results indicate that compared with steel-RPC frames,SFCBs-RPC frames exhibit good post-yielding stiffness which significantly improves the bearing capacity of frames after yielding and reduces its residual deformation,indicating good deformation recovery ability.SFCBs-RPC frames has higher ductility than RPC frames reinforced with BFRP(basalt fibre reinforced polymer)bars.RPC frames has greater bearing capacity and ductility than reinforced normal concrete frames.The ductility of specimen decreases gradually with the increase of axial compression ratio and column longitudinal reinforcement ratio.The SFCBs-RPC frames generally exhibit good ductility.

关 键 词：钢-FRP复合筋 活性粉末混凝土 混凝土框架 抗震性能 参数分析 

分 类 号：TU375.4[建筑科学—结构工程]