| 引用本文: | 李莉,郑文忠.活性粉末混凝土连续梁塑性性能试验[J].哈尔滨工业大学学报,2010,42(2):193.DOI:10.11918/j.issn.0367-6234.2010.02.005 |
| LI Li,ZHENG Wen-zhong.Experimental study on plastic property of reactive powder concrete continuous beams[J].Journal of Harbin Institute of Technology,2010,42(2):193.DOI:10.11918/j.issn.0367-6234.2010.02.005 |
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| 摘要: |
| 为了研究活性粉末混凝土连续梁的塑性性能,制备了5根钢筋活性粉末混凝土两跨连续梁,完成了单跨单点加载试验.考察了试验梁在加载过程中的开裂、中支座控制截面受拉纵筋屈服、跨中控制截面受拉纵筋屈服和极限破坏状态等阶段的受力特征,基于试验结果提出了在设计用承载能力极限状态和真实承载能力极限状态下的中支座两侧等效塑性铰长度计算公式,以及以中支座控制截面相对塑性转角和中支座相对受压区高度为自变量的弯矩调幅计算公式. |
| 关键词: 活性粉末混凝土连续梁 内力重分布 等效塑性铰区长度 弯矩调幅 |
| DOI：10.11918/j.issn.0367-6234.2010.02.005 |
| 分类号:TU375.1 |
| 基金项目:教育部新世纪优秀人才支持计划资助项目(科技司[2005]290号) |
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| Experimental study on plastic property of reactive powder concrete continuous beams |
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LI Li, ZHENG Wen-zhong
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School of Civil Engineering,Harbin Institute of Technology,Harbin 150090,China
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| Abstract: |
| In order to investigate the plastic property of reactive powder concrete continuous beams,5 two-span reinforced reactive powder concrete continuous beams were fabricated,and were then tested with one point load applied at each midspan.During the test,the mechanical behaviors in the stage of cracks,yielding of the steel bar both in the critical section of intermediate support and mid span,and ultimate limit state were investigated.The calculation formulas of length of equivalent plastic hinge zone are presented based on the test data for the design state and the ultimate state.The calculation formulas of the moment modification coefficient with the plastic rotation of intermediate support and the relative height of compression zone as variables are presented respectively. |
| Key words: reactive powder concrete internal force redistribution length of equivalent plastic hinge zone moment modification |
