|本期目录/Table of Contents|

[1]曹鸿鹏,李耀庄,曾琦,等.预应力RC梁抗火性能试验研究与有限元分析[J].中国安全生产科学技术,2016,12(10):24-29.[doi:10.11731/j.issn.1673-193x.2016.10.004]
　CAO Hongpeng,LI Yaozhuang,ZENG Qi,et al.Experimental study and finite element analysis on fire resistance of pre-stressed RC beams[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2016,12(10):24-29.[doi:10.11731/j.issn.1673-193x.2016.10.004]
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预应力RC梁抗火性能试验研究与有限元分析
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《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]

卷:
12
期数:
2016年10期
页码:
24-29
栏目:
学术论著
出版日期:
2016-10-30

文章信息/Info

Title:
Experimental study and finite element analysis on fire resistance of pre-stressed RC beams
作者:
曹鸿鹏1; 李耀庄1; 曾琦2; 谢宝超1
1.中南大学 土木工程学院，湖南 长沙 410075；2. 中国中铁二院工程集团有限 责任公司，四川 成都 610031）
Author(s):
CAO Hongpeng1;  LI Yaozhuang1;  ZENG Qi2;  XIE Baochao1
1. School of Civil Engineering, Central South University, Changsha Hunan 410075, China; 2. China Railway Eryuan Engineering Group Co. Ltd., Chengdu Sichuan 610031, China
关键词:
预应力混凝土梁; 高温; 预应力损失; 耐火性能; 有限元模拟
Keywords:
pre-stressed concrete beam;  high temperature;  pre-stress loss;  fire resistance;  finite element simulation
分类号:
X932
DOI:
10.11731/j.issn.1673-193x.2016.10.004
文献标志码:
A
摘要:
为了考察预应力钢绞线张拉控制应力和梁的持荷水平两个因素对无粘结预应力混凝土梁抗火性能的影响，基于 ISO834标准升温曲线，对4根无粘结预应力混凝土梁进行恒载升温试验，同时应用ANSYS有限元软件建立无粘结预应力混 凝土梁有限元模型，进行恒载升温过程的有限元数值模拟。结果表明：有限元计算结果与试验结果符合较好；预应力钢 绞线张拉控制应力越大，预应力损失速度越快，梁变形速率越快，耐火性能越差；梁上作用荷载水平越高，跨中挠度越 大，变形速率越快，耐火极限越小。
Abstract:
In order to study the effect of tension control stress of pre-stressed steel strand and load level of beam on the fire resistance performance of unbonded pre-stressed concrete beam, the elevating temperature experiments at constant load of four unbonded pre-stressed concrete beams were conducted based on the ISO834 standard time-temperature curve. A finite element model of unbonded pre-stressed concrete beam was established by ANSYS to conduct the finite element simulation of the elevating temperature process at constant load. The results showed that the calculation results of finite element agree well with the test results. The larger the tension control stress of pre-stressed steel strand, the faster the pre-stress loss rate and the beam deformation rate, and the poorer the fire resistance. The higher the load level on beam, the larger the mid-span deflection, the faster the deformation rate, and the shorter the duration of fire resistance. Key words: pre-stressed concrete beam; high tempera

参考文献/References:

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备注/Memo

备注/Memo:
国家自然科学基金项目（51208525）
更新日期/Last Update: 2016-11-30