摘要
基于Abaqus有限元软件,模拟钢筋混凝土梁三面受火作用下的温度场变化,分析了梁截面温度的分布规律,研究了混凝土保护层厚度、防火涂料厚度等关键因素对混凝土梁中受拉(压)钢筋、混凝土的温度场影响。研究表明,增加混凝土保护层厚度及防火涂料厚度均可有效提高梁的受火性能。保护层厚度增加一倍,受拉(压)钢筋温度分别下降52.5%(30.5%),防火涂料厚度增加一倍,钢筋的温度降低仅5.8%,混凝土的温度降低约16.9%。相比而言,增加混凝土保护层厚度更加经济、有效。
Based on the Abaqus finite element software,the temperature field changes of reinforced concrete beams under fire on three sides are simulated,the temperature distribution law of beam section is analyzed,and the influence of key factors such as the thickness of concrete cover and fire retardant coating on the temperature field of tension(compression)reinforcement and concrete in concrete beams is studied.The results have shown that increasing the thickness of the concrete protective layer and the thickness of the fireproof coating can effectively improve the fire performance of the beam.When the thickness of protective layer was doubled,the temperature of the tension(compression)steel bars was reduced by 52.5%(30.5%),and the thickness of the fireproof coating was doubled.The temperature of the steel bars was reduced by only 5.8%,and the temperature of the concrete was reduced by about 16.9%.In contrast,increasing the thickness of concrete cover is more economical and effective.
作者
刘子建
赵俣
Liu Zijian;Zhao Yu(Fire and Rescue Detachment of Yangzhou City,Yangzhou 252001,China;Faculty of Civil Engineering and Mechanics,Jiangsu University,Zhenjiang 212013,China)
出处
《山西建筑》
2021年第9期40-42,共3页
Shanxi Architecture
关键词
火灾作用
钢筋混凝土梁
温度场
有限元分析
fire effect
reinforced concrete beam
temperature field
finite element analysis
作者简介
刘子建(1987-),男。
