摘要
为了研究压弯荷载作用下钢管再生混凝土组合柱的力学性能,以再生粗骨料取代率、偏心距、含钢率和长细比为参数,设计了16根组合柱试件进行轴心受压和偏心受压试验.研究结果表明:钢管再生混凝土组合柱偏压破坏过程和承载性能与普通混凝土的相似,受再生粗骨料取代率的影响不大;与轴压试件相比,偏压试件的初始刚度、极限承载力和变形能力减小;钢管含钢率增加或长细比减小,试件的抗弯刚度和极限承载力提高.试验结果分析基础上,建议采用能够考虑钢管作用以及对核心混凝土约束作用影响的计算方法进行压弯承载力设计.
To study the mechanical performance of embedded steel tube confined reinforced recycle concrete composite columns under combined bending and axial loading,sixteen specimens,considering the parameters of recycled coarse aggregate replacement ratio,eccentricity,steel ratio and slenderness ratio,were conducted to axial or eccentric compression test.Research results indicate the failure process and bearing behavior of the composite columns with recycle aggregate concrete is similar to those of ordinary concrete,and it is not significant affected by recycled coarse aggregate replacement ratio.The initial stiffness,ultimate bearing capacity and deformation capacity of eccentric compression specimens are weaker than those of axial compression specimens.With the increasing of steel ratio or the decreasing of slenderness ratio,the flexural rigidity and ultimate bearing capacity of the eccentric compression specimens are improved.Finally,it is suggested that the bearing capacity design of embedded steel tube confined reinforced recycle concrete composite columns under eccentric loading predicts by the reasonable calculation method,which can consider the effect of steel tube and its constraint for core concrete.
作者
柯晓军
杨春辉
苏益声
李军涛
KE Xiaojun;YANG Chunhui;SU Yisheng;LI Juntao(Key Laboratory of Disaster Prevention and Structural Safety of Ministry of Education,School of Civil Engineering and Architecture,Guangxi University,Nanning 530004,China;Guangxi Key Laboratory of Disaster Prevention and Engineering Safety,Guangxi University,Nanning 530004,China)
出处
《应用基础与工程科学学报》
EI
CSCD
北大核心
2020年第2期354-365,共12页
Journal of Basic Science and Engineering
基金
国家自然科学基金项目(51668007,51508112)
广西自然科学基金项目(2018GXNSFAA050007)
广西重点实验室系统性研究项目(2016ZDX02)
关键词
钢管混凝土
再生混凝土
组合柱
叠合柱
偏心受压
压弯承载力
计算方法
concrete-filled steel tube
recycled aggregate concrete
composite column
laminated column
eccentric compression
compression-bending capacity
calculation method
