钻芯对混凝土轴压柱性能影响的试验研究

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基金项目:

上海市科委应用技术开发项目(04-033);国家科技支撑计划(2006BAJ03A10-02)资助

EXPERIMENTAL RESEARCH ON AXIAL COMPRESSIVE RC COLUMNS WITH DRILLED CORE

1.
1. Shanghai Research Institute of Building Sciences,Shanghai 200032,China;
2.
2. Shanghai Key Laboratory of New Technology Research on Engineering Structure,Shanghai 200032,China

摘要: 通过3组9个足尺混凝土短柱的试验，研究钻芯(100)对混凝土轴压柱受力性能的影响。钻芯后混凝土轴压柱极限承载力降低5.63%~22.14%，极限位移降低1.88%~26.14%，其破坏形态由轴压破坏转变为小偏压破坏。首先对试验结果进行描述，然后研究了柱截面尺寸、钻芯位置、孔洞填补、钻断钢筋等因素对混凝土轴压柱受力性能的影响程度，并对影响的作用机理进行分析。
- 混凝土柱 /
- 钻芯 /
- 承载能力 /
- 试验研究
Abstract: Based on the experiment of nine RC approximate full-size square columns,the impact on performance of axial compressive RC columns caused by drilled core with 100 mm diameter is studied.After drilling core on axial compressive RC columns,not only the load-bearing capacity has a 5.63%～22.14% decrease and the ultimate displacement has a(1.88%～)26.14% decrease,but also the failure mode will transfer from axial compression to small eccentricity compression.The experimental results are firstly described,then effective factors such as cross-section of column,position of core,filled the core with HSC,cut off of the reinforcement are studied,and mechanisms of these factors are also analyzed.
- concrete column /
- drilled core /
- load-bearing capacity /
- experimental research