| 钢筋混凝土梁长期变形的计算 |
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| 引用本文： | 孙海林,叶列平,冯鹏.钢筋混凝土梁长期变形的计算[J].工程力学,2007,24(11):88-92. |
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| 作者姓名： | 孙海林 叶列平 冯鹏 |
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| 作者单位： | 清华大学土木工程系,结构工程与振动教育部重点实验室,北京,100084;清华大学土木工程系,结构工程与振动教育部重点实验室,北京,100084;清华大学土木工程系,结构工程与振动教育部重点实验室,北京,100084 |
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| 基金项目： | 交通部西部开发交通科技基金 |
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| 摘 要： | 基于受弯等效原则对混凝土徐变和收缩引起的截面曲率增大系数进行了分析,进而得到了钢筋混凝土梁的附加变形增大系数,计算公式形式简单、概念清楚、适用于以受弯荷载为主的钢筋混凝土梁的长期变形计算。与该文中3根试验梁和文献中31根试验梁的试验结果对比分析表明,建议方法计算结果与试验结果吻合较好,且优于文献其它方法。
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| 关 键 词： | 附加挠度增大系数 收缩 徐变 钢筋混凝土梁 受弯 |
| 文章编号： | 1000-4750（2007）11-0088-05 |
| 修稿时间： | 2006-04-21 |
LONG-TERM DEFLECTION PREDICTION OF REINFORCED CONCRETE BEAMS |
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| SUN Hai-lin,YE Lie-ping,FENG Peng.LONG-TERM DEFLECTION PREDICTION OF REINFORCED CONCRETE BEAMS[J].Engineering Mechanics,2007,24(11):88-92. |
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| Authors: | SUN Hai-lin YE Lie-ping FENG Peng |
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| Affiliation: | Key Laboratory for Structural Engineering and Vibration of the Ministry of Education, Department of Civil Engineering, Tsinghua University, Beijing 100084, China |
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| Abstract: | Three high-strength lightweight aggregate concrete beams were tested for long-term deflections.By comparison with the test results of 3 beams in this paper and 31 beams in other references,it is found that the design methods in corresponding standards and other existing models are not consistent with the test results.Based on equivalent bending moment method,section curvature induced by shrinkage and creep is analyzed.A simplified approach to evaluate creep and shrinkage effects in cracked concrete beams is presented,which considers creep and shrinkage deflections separately.With a clear physical concept and a simple formulation,the values obtained by the proposed method are found to be in good agreement with the test results and improvement is observed in comparison with the other existing methods. |
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| Keywords: | long-term deflection multiplier shrinkage creep reinforced concrete beams bending |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
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