防火涂料和钢板间之间的层间应力
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摘要
为了预测钢构件上防火涂料在外荷载作用下的破损,使用层间应力理论对拉伸和弯曲作用下防火涂料和刚板件之间的层间正应力进行了分析,对有限元分析层间正应力结果进行了验证。通过有限元分析,得到了弯曲和弯剪作用下层间正应力分布的规律,结果表明:不论弯曲或弯剪,防火涂料与钢板件间端部层间正应力的最大值只与防火涂料端部钢板件上的弯矩有关。进而采用层间引力理论对弯剪作用下最大粘结正应力进行了计算,并提出了一个简化计算公式。
In order to predict the damage of fire retardant coating on the steel members under external action,the interlaminar normal stress between fire retardant coating and steel plate is analyzed by employing the theory of interlaminar stress.The method of finite element analysis to compute the interlaminar normal stress is verified.The stress distribution of interlaminar is obtained by finite element analysis.The result shows that the interlaminar stress is determined by the moment applied on the steel plate on the boundary of fire protection.Accordingly,the maximum normal stress between fire protection and steel plate is figured out and a simple approach is proposed.
In order to predict the damage of fire retardant coating on the steel members under external action,the interlaminar normal stress between fire retardant coating and steel plate is analyzed by employing the theory of interlaminar stress.The method of finite element analysis to compute the interlaminar normal stress is verified.The stress distribution of interlaminar is obtained by finite element analysis.The result shows that the interlaminar stress is determined by the moment applied on the steel plate on the boundary of fire protection.Accordingly,the maximum normal stress between fire protection and steel plate is figured out and a simple approach is proposed.
引文
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[2]朱建明,游建平,刘应华,等.简支钢梁抗火设计的优化分析[J].建筑钢结构进展,2008,10(6):31-35.
[3]孙立春.浅谈建筑钢结构的防火处理[J].牡丹江大学学报,2008,17(2):120-121.
[4]王卫永,李国强,王培军.火灾下防火涂料破损后约束柱的稳定承载力[J].力学季刊,2008,29(1):120-126.
[5]李国强,王卫永,陈素文.火灾下防火涂料破损后钢柱的极限承载力[J].工程力学,2008,25(12):72-78.
[6]LI G Q,WANG W Y,CHEN S W.A simple approach for modeling fire-resistance of steel columns with locally damagedfire protection[J].Engineering Structures,2009,31(3):617-622.
[7]陈素文,李国强.地震次生火灾的研究进展[J].自然灾害学报,2008,17(5):120-126.
[8]PIPES R B,PAGANO N J.Interlaminar stresses in composite laminates under uniform axial extension[J].Journal ofComposite Materials,1970,44:538~548.
[9]阎相桥,杜善义,王铎.复合材料层板的层间应力分析及其应用[J].哈尔滨工业大学学报,1991,3:91-96.
[10]丁淑蓉,佟景伟,沈珉,等.热塑性复合材料层合板的层间应力与损伤机理[J].材料研究学报,2005,19(2):179-184.
[11]吴振,陈万吉.夹层板结构层间应力数值分析[J].大连理工大学学报,2006,46(3):313-318.
[12]傅衣铭,李升.考虑界面损伤层合梁板的层间应力分析[J].力学学报,2007,39(6):822-828.
[13]张福范.复合材料层间应力[M].北京:高等教育出版社,1993.
[14]段进,倪栋,王国业.ANSYS10.0结构分析从入门到精通[M].北京:北京科海电子出版社,2006.
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