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高温下钢筋混凝土连续梁的受力性能试验研究 被引量:23

EXPERIMENTAL INVESTIGATION OF BEHAVIOR OF REINFORCED CONCRETE CONTINUOUS BEAMS AT ELEVATED TEMPERATURE
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摘要 本文介绍6根钢筋混凝土两跨连续梁的高温试验,考察不同加载位置、荷载水平以及单跨或双跨加温等因素下连续梁的变形和内力随温度的变化规律,分析了连续梁的破坏特征和机构等.结果表明,在升温过程中连续梁发生剧烈的内力重分布,塑性铰是一个可变铰,而且可能改变其破坏机构,与常温下具有显著的差异. In this paper, the behavior of reinforced concrete continuous beams of two spans are investigated at elevated temperature. Six specimens were loaded in different load positions and at different levels and heated in both spans or one span only. From the test results, the general regularities of the deformation and internal forces of continuous beams at elevated temperature have been presented, and the failure modes and mechanism of them have been analysed. It is shown that the internal forces of the continuous beams are rapidly and considerably redistributed at elevated temperature. And the failure mechanism of the specimens differs from that at the room temperature. It is also concluded that the ultimate strengths of the plasticity hinges vary as temperature elevated.
机构地区 清华大学
出处 《土木工程学报》 EI CSCD 北大核心 1997年第4期26-34,共9页 China Civil Engineering Journal
基金 国家自然科学基金 国家教委高等学校博士学科点专项基金资助项目
关键词 高温 破坏机构 钢筋混凝土梁 连续梁 力学性能 high temperature, internal force redistribution, failure mechanism, reinforced concrete continuous beam.
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参考文献2

  • 1时旭东,博士学位论文,1992年
  • 2时旭东,首届结构工程学术会议论文集,1991年

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