高温下钢筋砼连续梁的破坏机构和内力重分布研究  

Investigation of Failure Mode and Internal Force Redistribution of Reinforced Concrete Continuous Beams at Elevated Temperature

作　　者：时旭东[1] 过镇海[1] 

机构地区：[1]清华大学土木系,北京100084

出　　处：《建筑结构》1996年第7期34-37,共4页Building Structure

摘　　要：通过对6根钢筋砼两跨连续梁进行高温试验,分析了连续梁的破坏特征、机构以及内力重分布情况.结果表明,在升温过程中,不但连续梁内力要发生剧烈的重分布,而且可能改变其破坏机构,与常温下具有显著的差异,塑性铰是一个可变铰.The behaviors of reinforced concrete continuous beams of two spans are investigated at elevated temperature. From the test results of six specimens, the failure modes, mechanism and internal force redistribution of the continuous beams are 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 the temperature elevated.

关 键 词：钢筋混凝土 连续梁 内力 重分布 高温 

分 类 号：TU375.101[建筑科学—结构工程]