[1]范圣刚,舒赣平,霍昌盛.高强度螺栓受剪连接抗火性能试验研究[J].东南大学学报(自然科学版),2012,42(6):1180-1186.[doi:10.3969/j.issn.1001-0505.2012.06.029]
 Fan Shenggang,Shu Ganping,Huo Changsheng.Experimental study on fire-resistant behaviour of high-strength bolted shear connections[J].Journal of Southeast University (Natural Science Edition),2012,42(6):1180-1186.[doi:10.3969/j.issn.1001-0505.2012.06.029]
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高强度螺栓受剪连接抗火性能试验研究()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
42
期数:
2012年第6期
页码:
1180-1186
栏目:
土木工程
出版日期:
2012-11-20

文章信息/Info

Title:
Experimental study on fire-resistant behaviour of high-strength bolted shear connections
作者:
范圣刚12 舒赣平12 霍昌盛3
1 东南大学土木工程学院,南京 210096; 2 东南大学混凝土及预应力混凝土结构教育部重点实验室,南京 210096; 3 上海核工程研究设计院,上海200233
Author(s):
Fan Shenggang12 Shu Ganping12 Huo Changsheng3
1 School of Civil Engineering, Southeast University, Nanjing 210096, China
2 Key Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education, Southeast University, Nanjing 210096, China
3
关键词:
高强度螺栓 受剪连接 抗火性能 高温
Keywords:
high-strength bolt shear connection fire resistant behaviour high temperature
分类号:
TU356
DOI:
10.3969/j.issn.1001-0505.2012.06.029
摘要:
为了考察高强度螺栓受剪连接的抗火性能,用试验方法研究了其在高温状态下和过火冷却后的抗剪性能与行为反应.通过稳态升温试验,对5组(共8个)试件开展了火灾试验,研究了滑移荷载与极限荷载随温度的变化规律; 通过常温下试验,研究了6组(共15个)过火后试件的受力性能,揭示了过火温度、过火处理方法和冷却方式对滑移荷载的影响.结果表明:当温度超过350 ℃时,滑移荷载与极限荷载随温度升高急剧下降; 过火温度越高,冷却后试件的滑移荷载值越小,且不同过火处理和冷却方式的试件滑移荷载值是不相同的.拟合出了高温下滑移荷载与极限荷载折减系数以及过火后滑移荷载折减系数的近似计算公式,建议高强度螺栓受剪连接抗火分析的临界温度取350 ℃,为钢结构抗火研究提供参考依据.
Abstract:
In order to reveal the fire-resistant behavior of high-strength bolted shear connections, the experimental studies on its shear performance and reaction behavior were carried out at high temperature and after fire. Through steady-state tests of temperature rising, the fire experiments were performed on five groups of connections specimens(eight specimens), and the variations of sliding load and limit load with temperature were investigated. At normal temperature, the mechanical behaviors of six groups of specimens(fifteen specimens)after fire were tested, and the effects of different fire temperatures, different approaches of handling fire and different cooling methods on the sliding load were revealed. The results show that when temperature exceeds 350 ℃, sliding load and limit load decline sharply as temperature rises. The higher the fire temperature, the smaller the sliding load of the specimen cooled after fire. Moreover, sliding load varies with different approaches of handling fire and cooling methods. Approximate formulas for reduction factors of sliding load and limit load at high temperature as well as reduction factors of sliding load after cooling are fitted. A value of 350 ℃ for critical temperature of high-strength bolted shear connection is recommended in fire-resistant analysis,which can be an indicative reference for future research on fire resistance of steel structures.

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备注/Memo

备注/Memo:
作者简介: 范圣刚(1974—),男,博士,副教授,101010393@seu.edu.cn.
基金项目: 江苏省自然科学基金资助项目(BK2009287)、江苏省产学研前瞻性联合研究项目(BY2012200,BY2009151).
引文格式: 范圣刚,舒赣平,霍昌盛.高强度螺栓受剪连接抗火性能试验研究[J].东南大学学报:自然科学版,2012,42(6):1180-1186. [doi:10.3969/j.issn.1001-0505.2012.06.029]
更新日期/Last Update: 2012-11-20