摘要
分析了箍筋约束混凝土的受力机理,提出了综合反映约束混凝土轴压性能的约束指标,并且按照约束效果将约束混凝土划分为高约束、中约束和低约束3类约束水平.在试验数据的基础上,给出了箍筋约束混凝土抗压强度、峰值应变、极限应变和破坏应变的计算公式并进行了验证,提出了箍筋约束混凝土轴心受压本构模型.结果表明:所提出的本构模型与试验结果符合较好且满足损伤边界条件,可用于该类构件的理论分析和设计计算.
By mechanical mechanism analysis,confined index was proposed to represent the compressive behavior of confined concrete.According to confined effect,three-confined level(high,middle,low)was divided.Based on the test results,the formulas to calculate compressive strength,peak strain,ultimate strain and fracture strain were proposed and verified,a stress-strain model of confined concrete was developed.The proposed model can predict the test result accurately and satisfy the damage boundary conditions.The model is feasible in the theoretical analysis and design of this type of member.
作者
王南
史庆轩
张伟
郑国栋
王海龙
WANG Nan;SHI Qingxuan;ZHANG Wei;ZHENG Guodong;WANG Hailong(School of Civil Engineering and Architecture,Linyi University,Linyi 276000,China;Linyi City Key Lab of Appraisement and Strengthening in Building Structures,Linyi 276000,China;School of Civil Engineering,Xi'an University of Architecture and Technology,Xi'an 710055,China)
出处
《建筑材料学报》
EI
CAS
CSCD
北大核心
2019年第6期933-940,共8页
Journal of Building Materials
基金
山东省自然科学基金资助项目(ZR2019PEE017,ZR2017BEE001)
国家自然科学基金资助项目(51478382,51704152)
山东省住房城乡建设科技计划项目(2018-K2-06)
临沂大学科研启动基金项目(LYDX2016BS049)
关键词
约束混凝土
箍筋
本构模型
强度
应变
损伤
confined concrete
stirrups
stress-strain model
strength
strain
damage
