火灾后钢筋混凝土连续板承载力的试验研究  

Experimental research on the bearing capacity of reinforced concrete continuous slab after fire

作　　者：项凯[1] 余江滔[2] 陆洲导[2] 

机构地区：[1]公安部天津消防研究所,天津300381 [2]同济大学结构工程与防灾研究所,上海200092

出　　处：《西安建筑科技大学学报（自然科学版）》2009年第5期650-654,共5页Journal of Xi'an University of Architecture & Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(50578126)

摘　　要：简要介绍了钢筋混凝土连续板的火灾试验和静载试验.试验结果表明,受火后板的屈服荷载及极限荷载均低于常温板,随着受火时间的增加和受火温度的升高,板的承载力逐渐降低.在刚度方面,在相同荷载作用下,受火后板的刚度要远小于常温板的刚度.受火后板的内力重分布发生变化,支座截面受火板的调幅系数低于常温板.试验结果为火灾后混凝土结构的损伤评估提供了试验依据.The fire test and static test on reinforced concrete continuous slab are briefly introduced in this paper. The results demonstrate that the bearing capacity of slab after fire will become lower with longer time and higher temperature of the fire. The rigidity of slab after fire is lower than normal temperature slab＇s rigidity under the same load. For fire-damaged slab and normal temperature slab, their moment redistribution is different. The former is lower than the latter. This paper provides with testing results for damage evaluation of concrete continuous bending member after fire.

关 键 词：火灾 连续板 承载力 弯矩重分布 

分 类 号：TU375.2[建筑科学—结构工程] TU317