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EXPERIMENTAL RESEARCH ON AXIAL COMPRESSIVE RC COLUMNS WITH DRILLED CORE
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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。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.
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Key words:
- concrete column /
- drilled core /
- load-bearing capacity /
- experimental research
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[2] 胡贵友.导致混凝土钻芯取样强度差异的因素[J].建筑技术,2004,35(4):290-291; CECS 03∶2007钻芯法检测混凝土强度技术规程[S]; [3] Bungey J.Determining Concrete Strength by Using Small-DiameterCores[J].Magazine of Concrete Research,1979,31(107):91-98; [4] Bartlett M,MacGregor J.Effect of Moisture Condition on ConcreteCore Strengths[J].ACI Materials Journal,1994,91(3):227-236; [5] Bartlett M,MacGregor J.Effect of Core Length-to-Diameter Ratio onConcrete Core Strengths[J].ACI Materials Journal,1994,91(4):339-348; [6] Bartlett M,MacGregor J.Effect of Core Diameter on Concrete CoreStrengths[J].ACI Materials Journal,1994,91(5):460-470. -
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