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浙江大学学报(工学版)
土木工程     
基于残余位移的空间结构火灾温度场推定方法
崔璟1, 尹凌峰1, 郭小明1, 唐敢2
1. 东南大学 土木工程学院,江苏 南京 210096;2. 南京航空航天大学 土木工程系,江苏 南京 210016
Inverse presumption method for temperature fields of spatial structure based on residual displacement
CUI Jing1, YIN Ling feng1, GUO Xiao ming1, TANG Gan2
1. School of Civil Engineering, Southeast University, Nanjing 210096, China; 2. Department of Civil Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
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摘要:

针对火灾下结构温度场的反演问题,提出基于火灾后结构残余位移的温度场逆向推定方法,以有限元位移解与实测位移的差值为优化目标函数,选取合适的权函数构造火灾后的结构温度场逆向推定算法,通过温度场迭代计算定量得到结构经历的最高温度场分布,为科学评估火灾后的钢结构残余性能和结构修复加固提供理论依据.设计Williams双杆火灾试验,对比试验数据和逆向推定结果表明,温度场逆向推定方法是可行的,具有较高的精度.

Abstract:

A temperature inversion presumption method was developed based on post fire structure residual deformations according to the inverse problem for temperature field of spatial structure exposed to fire. The difference between measured and finite element method values was made as optimization object function. An inverse algorithm was constructed by selecting an eligible weight function. The temperature field distribution was obtained by iterative calculation. A theoretical basis for scientificly evaluating the residual performances of post fire structure and formulating reliable repair and reinforcement schemes was provided. Williams toggle frames for fire experiment were designed. The collected test data was compared with the presumption results. The method is feasible and the results have enough accuracy.

出版日期: 2016-04-01
:  TU 311  
基金资助:

江苏省高校优势学科建设工程资助项目(1105007001);江苏省普通高校研究生科研创新计划资助项目(CXLX12_0076).

通讯作者: 尹凌峰,男,副教授. ORCID: 0000 0003 4528 7028.     E-mail: eking@seu.edu.cn
作者简介: 崔璟(1983—),男,博士生,从事优化算法的研究. ORCID: 0000 0002 3217 2144. E-mail: cuijing.2003@seu.edu.cn
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引用本文:

崔璟, 尹凌峰, 郭小明, 唐敢. 基于残余位移的空间结构火灾温度场推定方法[J]. 浙江大学学报(工学版), 10.3785/j.issn.1008-973X.2016.04.017.

CUI Jing, YIN Ling feng, GUO Xiao ming, TANG Gan. Inverse presumption method for temperature fields of spatial structure based on residual displacement. JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE), 10.3785/j.issn.1008-973X.2016.04.017.

链接本文:

http://www.zjujournals.com/eng/CN/10.3785/j.issn.1008-973X.2016.04.017        http://www.zjujournals.com/eng/CN/Y2016/V50/I4/720

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