| HRB500级钢筋混凝土梁裂缝宽度试验研究 |
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| 引用本文： | 高瑞平,邱洪兴,胡涛,丁振坤,蓝宗建. HRB500级钢筋混凝土梁裂缝宽度试验研究[J]. 工业建筑, 2010, 40(3) |
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| 作者姓名： | 高瑞平 邱洪兴 胡涛 丁振坤 蓝宗建 |
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| 作者单位： | 东南大学土木工程学院,南京,210096;东南大学土木工程学院,南京,210096;东南大学土木工程学院,南京,210096;东南大学土木工程学院,南京,210096;东南大学土木工程学院,南京,210096 |
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| 摘 要： | 对15根配置HRB500级钢筋的混凝土梁进行裂缝宽度试验,研究试验梁中裂缝特性,分析GB50010—2002《混凝土结构设计规范》的裂缝宽度计算方法。分析结果表明:对于配置HRB500级钢筋的混凝土梁,钢筋应变εsm-εs平行性关系仍然成立;截面内力臂系数取0.87,与试验结果符合良好;裂缝间距及裂缝宽度试验值较规范公式计算值小,调整钢筋粘结特征系数为1.2,可提高规范公式计算精度;规范的裂缝计算模式能够反映实际裂缝规律,但最大裂缝宽度计算结果偏于保守。
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| 关 键 词： | HRB500级钢筋 混凝土梁 裂缝间距 裂缝宽度 试验研究 |
EXPERIMENTAL RESEARCH ON CRACK WIDTH OF HRB500 STEEL BARS RC BEAMS |
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| Gao Ruiping,Qiu Hongxing,Hu Tao,Ding Zhenkun,Lan Zongjian. EXPERIMENTAL RESEARCH ON CRACK WIDTH OF HRB500 STEEL BARS RC BEAMS[J]. Industrial Construction, 2010, 40(3) |
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| Authors: | Gao Ruiping Qiu Hongxing Hu Tao Ding Zhenkun Lan Zongjian |
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| Abstract: | Experiment was carried out on crack width of 15 concrete beams reinforced with HRB500 steel bars. Crack properties of specimens were studied; and the calculating method of crack width in GB 50010-2002 Code for Design of Concrete Structures was analyzed. The results indicate that the parallel relationship of ε_(sm)-ε_s, is true for HRB500 steel bars. It is proper to take 0.87 for coefficient of internal force arm. Test results of crack spacing and crack width is smaller than that calculated by the formula from GB 50010-2002. Adjusting bond coefficient of HRB500 steel bars to 1.2 can improve the accuracy of the formula. Crack calculating mode of GB 50010-2002 is practical while the calculated maximum crack width is conservative. |
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| Keywords: | HRB500 steel bar concrete beams crack spacing crack width experimental study |
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