摘要
通过对9根方柱的单调加载抗压试验,研究高性能水泥复合砂浆钢筋网薄层(HPFL)加固钢筋混凝土方柱的轴压性能,不仅加固柱抗压承载力、峰值应变、延性、刚度得到了明显提高,而且这些性能指标随横向网筋体积配筋率的增大而提高,此外加固柱的开裂模式与破坏形态也有了明显改善。在试验研究与理论分析的基础上,揭示了HPFL改善或增强加固柱各项性能的作用机理,建立了可靠、实用的加固方柱承载力的计算模型与计算公式。
This paper studies the axially compressed behavior of RC square columns strengthened by high performance ferrocement laminates(HPFL)through the monotonic loading comparison experiment of nine square columns,it was found that the strengthening columns demonstrated obvious improving in load-bearing capacity、 the peak strain、the ductility、the rigidity,and these performance parameters increase with volume reinforcement percentage increasing of transverse steel bar of mesh,in addition,the strengthening columns presented significant improvement in cracking model and the failure mode.And on the basis of experimental research and theory analysis,the paper reveals the acting mechanism that the HPFL can improve or increase various performances of columns and establishes the reliable and practical calculation model and formulas of load-bearing capacity of RC square columns.
出处
《建筑技术》
2013年第11期996-1000,共5页
Architecture Technology
基金
国家自然科学基金项目(51058001)
湖南省教育厅重点项目(10A024)
湖南省自然科学基金项目(10JJ3080)
湖南省科技厅一般项目(2009GK3007)
关键词
高性能水泥复合砂浆钢筋网薄层(HPFL)
加固方柱
抗压性能
作用机理
承载力计算公式
high performance ferrocement laminate(HPFL)
strengthening of square column
compressed behavior
acting mechanism
calculation%formulas of the load-bearing capacity
