| 配置表层钢筋的混凝土梁裂缝宽度计算方法 |
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| 引用本文： | 李志华,苏小卒.配置表层钢筋的混凝土梁裂缝宽度计算方法[J].东南大学学报(自然科学版),2009,39(1). |
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| 作者姓名： | 李志华 苏小卒 |
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| 作者单位： | 1. 同济大学建筑工程系,上海,200092;哈尔滨工业大学(威海)土木工程系,威海,264209
2. 同济大学建筑工程系,上海,200092 |
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| 基金项目： | 国家高技术研究发展计划(863计划) |
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| 摘 要： | 为了研究配置表层钢筋的混凝土梁的开裂性能,对8根配置500 MPa钢筋的矩形混凝土梁进行了受弯性能试验.试验结果表明,在构件的混凝土保护层中配置表层钢筋能使平均裂缝问距减小30%～50%,使短期最大裂缝宽度减小29%～70%.根据试验结果,分析了表层钢筋对混凝土梁平均裂缝间距和平均裂缝宽度的影响规律,并在我国规范GB 50010-2002裂缝宽度计算模式的基础上,提出了考虑表层钢筋的短期最大裂缝宽度计算公式.根据所提出公式计算的结果能够较好地与试验结果吻合.
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| 关 键 词： | 钢筋混凝土梁 表层钢筋 裂缝间距 裂缝宽度 裂缝控制 |
Calculation method of crack width in reinforced concrete beams with skin reinforcement |
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| Li Zhihua,Su Xiaozu.Calculation method of crack width in reinforced concrete beams with skin reinforcement[J].Journal of Southeast University(Natural Science Edition),2009,39(1). |
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| Authors: | Li Zhihua Su Xiaozu |
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| Abstract: | To investigate the cracking behavior of reinforced concrete beam with skin reinforcement,a test of eight rectangular section flexural members reinforced with 500 MPa steel bar was carried out.Test results suggest that the skin reinforcement can reduce average crack spacing by 30% to 50% and short-time maximum crack width by 29% to 70%.The effect of skin reinforcement on average crack spacing and average crack width is analyzed based on the test results.A short-time maximum crack width formula concerning the... |
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| Keywords: | reinforced concrete beams skin reinforcement crack spacing crack width crack control |
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