计算力学学报2017，Vol.34Issue(1)：68-75,8.DOI:10.7511/jslx201701009
基于能量守恒理论的带肋钢筋-混凝土粘结滑移本构关系研究
Bond-slip constitutive model between ribbed steel bars and concrete based on the conservation law of energy
摘要
Abstract
This paper concentrates on analytical solution of local bond stress-slip relationship between ribbed steel bars and concrete corresponding to the splitting model of bond failure.The uncracked process of concrete splitting in the cover depth is divided into elastic stage and cracked stage.The thick-walled cylinder model is used for the initial elastic stage,while the cracked thick-walled cylinder model with softening behaviour of concrete is applied for the latter cracked stage.The energy equation of the two models is presented and the variation characteristic of energy during the process of splitting is discussed.Based on the energy conservation law,the differential equation accounting for bond stress-slip relationship is derived,which is used to obtain the local bond stress-slip relationship by numerical integration.The model shows good agreement with the available experimental results and accounts for the parameters of concrete and steel,which influence the local bond stress-slip response as observed in the experiment.Finally,the theoretical and the experimental results are compared and analysed.关键词
混凝土/粘结滑移/能量守恒/带肋钢筋/劈裂破坏Key words
concrete /bond-slip /energy conservation law /ribbed bars /splitting failure分类
建筑与水利引用本文复制引用
李龙龙,王立成..基于能量守恒理论的带肋钢筋-混凝土粘结滑移本构关系研究[J].计算力学学报,2017,34(1):68-75,8.基金项目
国家重点基础研究发展计划(973计划)(2015CB057703) （973计划）
国家自然科学基金面上项目(51378090)资助项目. （51378090）
