摘要
通过１０根采用增大截面法加固钢筋混凝土柱大偏压二次受力的试验研究，分析了荷载预应力、纵向钢筋配筋率等因素对加固构件性能的影响；验证了在二次受力情况下组合截面平截面假定的适应性；证实了这类组合构件中核心柱钢筋应力超前和围套混凝土应变滞后现象。根据试验和全过程计算分析的结果，提出了大偏压受压对加固柱的承载力不受应力水平指标影响的结论。
Based on experimental study on strengthening 10 reinforced concrete columns using increasing section method,the influence of the load prestress and ratio of longitudinal reinforcement on the column behavior is describedherein. Experiment not only shows that average strains are consistent with plane ation hypothesis, but also proves the phenomena of 'stress excess of steel'and'strain delay of concrete'in the composite columns daring second stage of loading. It is put forward that the load capacity is not effected by stress level index.
出处
《工业建筑》
CSCD
北大核心
1994年第9期31-37,共7页
Industrial Construction
关键词
混凝土
柱
二次受力
试验
加固
two stages
columns with concrete cover
stress level index stress excess
