- 摘 要
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(1 同濟(jì)大學(xué)土木工程學(xué)院，上海 200092； 2 同濟(jì)大學(xué)土木工程防災(zāi)國家實(shí)驗(yàn)室，上海 200092；3 重慶大學(xué)土木工程學(xué)院，重慶 400045)
［摘要］采用有限元數(shù)值分析得出了防火涂料局部破損后鋼構(gòu)件的溫度分布規(guī)律，提出了臨界破損長度的概念。分析了柱長、防火涂料厚度、截面形狀系數(shù)，以及標(biāo)準(zhǔn)火災(zāi)升溫時(shí)間對防火涂料局部破損后鋼構(gòu)件溫度分布的影響。給出了破損長度和其影響區(qū)域內(nèi)溫度分布的計(jì)算公式，可供結(jié)構(gòu)抗火性能分析和設(shè)計(jì)參考。
［關(guān)鍵詞］鋼構(gòu)件；溫度；防火涂料；臨界破損長度
Influence of fire retardant coating damage on temperature distribution of steel members
Li Guoqiang1，2，Wang Jia1，Wang Weiyong3(1 School of Civil Engineering, Tongji University, Shanghai 200092, China;2 State Key Lab for Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092, China；3 School of Civil Engineering, Chongqing University, Chongqing 400045, China)
Abstract:The temperature distribution of steel members with partial fire retardant coating damage is obtained by analysis using finite element method. The definition of critical damage length is proposed and the influence of column length, thickness of fire retardant coating, shape coefficient and temperature-elevation-time of standard fire on temperature distribution along the steel members with partial fire retardant coating damage are analyzed. A calculation approach is presented to compute the temperature of steel members in the part of damage length and its influence area. The approach can be referred by the researchers and engineers to analysis and design steel structure in fire.
Keywords:steel members; temperature; fire retardant coating; critical damage length
基金項(xiàng)目：國家自然科學(xué)基金資助(50738005)，國家自然科學(xué)基金創(chuàng)新研究群體資助(50621062)。
作者簡介：李國強(qiáng)，博士，教授，博導(dǎo)，Email：gqli@mail.#edu.cn。
參考文獻(xiàn)
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［3］FONTANA M, KNOBLOCH M. Fire resistance of steel columns with partial loss of fire protection［C］//Proceedings of the IABSE Symposium Shanghai 2004，Metropolitan Habitats and Infrastructure, IABSE Report, Shanghai, China, 2004.
［4］KNOBLOCH M，RAVEGLIA E， FONTANA M. Partial loss of fire protection and structural collapse of high-rise buildings［C］//International Congress Fire Safety in Tall Buildings, University of Cantabria, Santander, Spain，October 2006.
［5］KANG Y, HADJISOPHOCLEOUS GV, KHOO HA. The effect of partial fire protection loss on the fire resistance reduction of steel beams［C］//Fourth International Workshop Structures in Fire, Aveiro，Portugal，May 2006.
［6］STEPHEN PESSIKI, KIHYON KWON, BYOUNG JUN LEE. Fire load behaviour of steel building columns with damaged spray-applied fire resistive material［C］//Fourth International Workshop Structures in Fire, Aveiro, Portugal， May 2006.
［7］王佳，李國強(qiáng). 防火涂料局部破損對鋼構(gòu)件在火災(zāi)下的溫度分布影響［J］. 結(jié)構(gòu)工程師，2005，21(5).
［8］李國強(qiáng)，翰林海，樓國彪，等. 鋼結(jié)構(gòu)及鋼混凝土組合結(jié)構(gòu)抗火設(shè)計(jì)［M］. 北京：中國建筑工業(yè)出版社，2006.
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