Factors governing the fire response of bonded prestressed concrete continuous beams
Factors governing the fire response of bonded prestressed concrete continuous beams
复制标题
粘结预应力混凝土连续梁火灾反应的影响因素
DOI：
10.1617/s11527-014-0365-9
复制
发表时间：
2015-09
影响因子：
3.8
通讯作者：
郑文忠
中科院分区：
文献类型：
--
作者：
侯晓萌;VKR Kodur;郑文忠
Results from fire resistance experiments on nine bonded prestressed concrete (PC) continuous beams are presented in this paper. The test variables included concrete cover thickness, load level, degree of prestressing and effective prestress. Data from the experiments are utilized to study the effect of critical parameters on thermal and structural response of bonded PC continuous beams under fire conditions. Test results show that concrete cover thickness, load level, degree of prestressing and fire induced secondary moments have significant influence on the fire resistance of bonded PC beams. Specifically fire induced secondary moments increase the total moments at intermediate supports by as much as 1.6 times of that due to imposed external loading under ambient conditions. It is also shown that the fire resistance of PC continuous beams is significantly higher than similar PC simply supported beams. These critical factors are to be considered for evaluating the fire resistance of PC continuous beams under fire conditions.
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