基于ABAQUS的组合楼板的耐火性能研究

Study on Fire Resistance of Composite Floor Based on ABAQUS

摘要: 组合楼板在建筑结构体系中应用广泛，但高温会导致其材料质量下降及承载力降低等问题。本文采用ABAQUS有限元软件建模与试验进行对比验证，并且分析升温曲线以及荷载大小对组合楼板产生的变形影响。经过本文的分析，可知升温曲线对组合板温度场和挠度的影响都非常的显著，RABT曲线和HC曲线的最终挠度相比与ISO-834升温曲线在100分钟的挠度提升了43.6%和35.4%。而烃类升温曲线的最终挠度相比与ISO-834曲线降低了72%。本文还研究了在5.0 KN/m²、6.0 KN/m²、8.0 KN/m²、9.5 KN/m²、11.0 KN/m²下组合板的变形情况，升温曲线依旧采用ISO-834。研究结果表明：在11.0 KN/m²下组合板的挠度比5.0 KN/m²下组合板的挠度增大了53.3%，且挠度曲线会更加迅速地下降。荷载的增大对压型钢板混凝土组合板的挠度影响很明显。

Abstract: Composite floor is widely used in building structure system, but high temperature will lead to material quality and bearing capacity reduction. In this paper, ABAQUS finite element software is used to model and verify the comparison with the test, and the influence of temperature rise curve and load on the deformation of composite floor is analyzed. Through the analysis in this paper, it can be seen that the temperature curve has a very significant impact on the temperature field and deflection of the composite plate. The final deflection of RABT curve and HC curve increases by 43.6% and 35.4% compared with that of ISO-834 temperature curve in 100 minutes. The final deflection of the hydrocarbon temperature curve is 72% lower than that of ISO-834 curve. This paper also studies the deformation of composite plates under 5.0 KN/m², 6.0 KN/m², 8.0 KN/m², 9.5 KN/m², 11.0 KN/m², and the temperature rise curve still adopts ISO-834. The results show that the deflection of the composite plate under 11.0 KN/m² is 53.3% higher than that under 5.0 KN/m², and the deflection curve will decline more rapidly. The increase of load has obvious influence on the deflection of compacted steel sheet concrete composite plate.