[1]傅传国,*,宋亚敏,等.热力耦合作用下钢筋混凝土梁抗剪性能试验研究[J].山东建筑大学学报,2018,(05):1-10.[doi:10.12077/sdjz.2018.05.001]
 Fu Chuanguo,*,Song Yamin,et al.Experimental study on shear bearing capacity of reinforced concrete beams under thermodynamic coupling[J].Journal of Shandong jianzhu university,2018,(05):1-10.[doi:10.12077/sdjz.2018.05.001]
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热力耦合作用下钢筋混凝土梁抗剪性能试验研究()
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《山东建筑大学学报》[ISSN:1673-7644/CN:37-1449/TU]

卷:
期数:
2018年05期
页码:
1-10
栏目:
研究论文
出版日期:
2018-10-09

文章信息/Info

Title:
Experimental study on shear bearing capacity of reinforced concrete beams under thermodynamic coupling
文章编号:
1673-7644(2018)05-0001-10
作者:
傅传国1*宋亚敏2 尹安康1 梁书亭2闫凯1
(1.山东建筑大学 土木工程学院,山东 济南 250101;2.东南大学 土木工程学院,江苏 南京 210096)
Author(s):
Fu Chuanguo1*Song Yamin2Yin Ankang1et al.
(1.School of Civil Engineering, Shandong Jianzhu University, Jinan 250101, China; 2. School of Civil Engineering, Southeast University, Nanjing 210096, China)
关键词:
火灾钢筋混凝土简支梁抗剪承载力耐火极限
Keywords:
fire reinforced concrete simply supported beam shear capacity fire resistance limit
分类号:
TU 375
DOI:
10.12077/sdjz.2018.05.001
文献标志码:
A
摘要:
建筑物火灾高温将严重劣化钢筋混凝土结构斜截面的承载性能,加强受火灾高温作用影响的钢筋混凝土结构斜截面承载性能的研究具有重要的理论和现实意义。文章按照“强弯弱剪”原则设计制作了8根足尺钢筋混凝土简支梁试件,其中3根进行了常温下承载力静载试验,并借助大型火灾模拟试验系统,对另外5根试件进行了热力耦合作用下的耐火极限试验。结果表明:设计的简支梁试件在常温静载试验中呈现明显的剪切破坏形态,但在火灾高温及恒载耦合作用下达到耐火极限时,其破坏形态既可能呈现剪切破坏形态,也可能呈现受弯破坏形态;在热力耦合作用下,有腹筋钢筋混凝土简支梁的加载剪跨比越大,其实测耐火极限越小,而加载荷载比越大,实测有腹筋钢筋混凝土简支梁的耐火极限越小;钢筋混凝土简支梁试件在热力耦合作用下邻近耐火极限时,其竖向变形速率快速增加,达到耐火极限时的破坏具有突然性。
Abstract:
The high temperature of building seriously degrade the bearing capacity of the inclined section of reinforced concrete (RC) structures. It is of great theoretical and practical significance to study the bearing capacity of the inclined section of RC structures affected by the fire high temperature. This paper designed 8 fullscale reinforced concrete beam specimens in accordance with the principle of “strong bending and weak shearing”. Among them, 3 specimens are used as contrastive specimens to carry out static load test at ambient temperature, the other 5 specimens are subjected to the fire resistance limit test under the thermodynamic coupling effect through the large fire simulation test system. The experimental results show that the designed simply supported beam exhibits obvious shear failure mode in static load test at normal temperature,but the failure mode may be either shear failure mode or bending failure mode when it reaches the fire end limit under the action of fire high temperature and dead load coupling. The larger the shear span ratio of reinforced concrete simply supported beam with thermodynamic coupling is, the smaller the measured fire resistance limit is; the larger the load ratio is under the thermodynamic coupling, the smaller the measured fire resistance limit is. The vertical deformation rate of the simply supported beam specimen increases rapidly when it is adjacent to the fire endurance under thermal coupling, and the damage at the time of reaching the fire resistance is sudden.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2018-09-05基金项目:国家自然科学基金项目(51478254)作者简介:傅传国(1963-),男,教授,博士,主要从事工程结构基本理论及防灾减灾等方面的研究工作. E-mail:sdfcguo@126.com[*通讯作者]
更新日期/Last Update: 2018-10-11