|本期目录/Table of Contents|

[1]邵文军,宋 雨*.火灾作用下预应力连续梁桥的力学性能分析[J].厦门大学学报(自然科学版),2017,56(04):611-616.[doi:10.6043/j.issn.0438-0479.201612005]
 SHAO Wenjun,SONG Yu*.Mechanical Performance Analysis of Pre-stressed Continuous Beam Bridge Under Fire[J].Journal of Xiamen University(Natural Science),2017,56(04):611-616.[doi:10.6043/j.issn.0438-0479.201612005]
点击复制

火灾作用下预应力连续梁桥的力学性能分析(PDF/HTML)
分享到:

《厦门大学学报(自然科学版)》[ISSN:0438-0479/CN:35-1070/N]

卷:
56卷
期数:
2017年04期
页码:
611-616
栏目:
研究简报
出版日期:
2017-07-26

文章信息/Info

Title:
Mechanical Performance Analysis of Pre-stressed Continuous Beam Bridge Under Fire
文章编号:
0438-0479(2017)04-0611-06
作者:
邵文军宋 雨*
厦门大学建筑与土木工程学院,福建 厦门 361005
Author(s):
SHAO WenjunSONG Yu*
School of Architecture and Civil Engineering,Xiamen University,Xiamen 361005,China
关键词:
连续梁桥 预应力 火灾 温度场 应力场
Keywords:
continuous beam bridge pre-stress fire temperature field stress field
分类号:
TU 37
DOI:
10.6043/j.issn.0438-0479.201612005
文献标志码:
A
摘要:
为研究火灾对预应力连续梁桥力学性能的影响,以福建某受火连续箱梁桥为背景,参考桥梁火灾的现场资料,确定模型的边界条件,选取适当的混凝土、预应力筋本构模型,考虑混凝土及钢筋热工参数随温度的变化,通过对火灾时桥梁的瞬态温度场分析,得出温度随时间和空间的变化,并分别比较在自重作用下以及车道荷载作用下火灾前和火灾时桥梁的力学性能变化,研究火灾对桥梁中混凝土、预应力筋等材料的影响.结果表明,对大跨度桥梁结构来说,火灾后,结构的传热速度相对较慢,热量从受火面向非受火面逐渐扩散,温度呈平流状分布; 火灾发生后,混凝土材料强度的损失要远远高于预应力筋强度的损失.
Abstract:
For the purpose of studying the effect of fire on mechanical properties of pre-stressed concrete continuous girder bridges,the boundary condition of the model is imposed by referring to data and results of the bridge fire.Constitutive models of the concrete and pre-stressed tendons are adopted and analyzed.Meanwhile,thermal parameters of the concrete and steel bars are also considered.Through the analysis of the transient temperature range of the bridge in the fire,changes of temperature according to time and space are obtained respectively.The mechanical performance of the bridge in normal temperature and fire temperature are also compared under the action of weight and lane loads,concrete,pre-stress tendons and so forth.In this paper,we have analyzed the influence of the fire on the material,and the influence of the temperature field on the stress range of the bridge is obtained.This analysis model can be used as a reference for the reparation,reinforcement,and fire resistance of the bridge.

参考文献/References:

[1] 魏德敏,高晓楠,张海燕.受火钢筋混凝土柱三维温度场的数值模拟[J].防灾减灾工程学报,2012,32(增刊):55-58.
[2] 王翠娟.火灾模式下多梁式混凝土T型梁桥结构性能研究[D].西安:长安大学,2013:38-49.
[3] 侯炜.预应力混凝土箱梁结构抗火性能研究[D].西安:长安大学,2014:116-120.
[4] 查晓雄,王晓璐,谢先义.GFRP筋混凝土梁耐火性能的试验研究[J].防灾减灾工程学报,2012,32(1):50-55.
[5] 吴波,梁悦欢.高温下混凝土和钢筋强度的统计分析[J].自然灾害学报,2010,19(1):136-142.
[6] 熊伟,李耀庄,严加宝.火灾作用下钢筋混凝土梁温度场数值模拟及试验验证[J].中南大学学报(自然科学版),2012,43(7):2838-2843.
[7] 郑文忠,闰凯,王英.预应力混凝土结构抗火研究进展[J].建筑结构学报,2011,32(12):52-61.
[8] 郑文忠,侯晓萌,陈伟宏.火灾后预应力混凝土简支板力学性能试验[J].哈尔滨工业大学学报,2011,43(2):8-13.
[9] 王俊,蔡跃,黄鼎业.预应力钢筋高温蠕变试验研究及有限元分析应用[J].土木工程学报,2004,37(11):1-6.
[10] 吴波,徐玉野.钢筋混凝土T形柱的耐火极限研究[J].土木工程学报,2007,40(3):30-34.
[11] 张岗,贺拴海,王翠娟.焰流效应的混凝土高墩火温时变分布[J].交通运输工程学报,2014,14(1):77-84.
[12] ASTANEH-ASL A,NOBLE C R,SON J,et al.Fire protection of steel bridges and the case of the MacArthur maze fire collapse[C]∥Proceedings of the ASCE TCLEE Life Line Earthquake Engineering in a Multihazard Environment Conference.Oakland:[s.n.],2009:1-12.
[13] ZHENG W Z,HOU X M,SHI D S,et al.Experimental study on concrete spalling in prestressed slabs subjected to fire[J].Fire Safety Journal,2010,45(5):283-297.

备注/Memo

备注/Memo:
收稿日期:2016-12-05 录用日期:2017-02-23
基金项目:福建省自然科学基金青年创新项目(2016J05136)
*通信作者:songyu@xmu.edu.cn
更新日期/Last Update: 1900-01-01