论文部分内容阅读
为计算火灾后及修复加固后型钢混凝土柱的承载能力和抗弯刚度,该文基于结构受火和受力的连续性,提出了火灾后和加固后型钢混凝土(SRC)柱力学性能的分析流程,采用有限元方法建立了相应的分析模型;并以某受火后的型钢混凝土柱为例,对比分析了火灾前、火灾后和加固后型钢混凝土柱的承载能力和抗弯刚度,获得了使用阶段抗弯刚度和不同轴向荷载比下截面极限抗弯承载力火灾后的损失率和加固后的提高率;在轴向荷载比为0～0.4时,其截面极限抗弯承载力的损失率和提高率分别为4.1%～6.4%和3.9%～9.1%。该文的分析流程和方法可为该类结构火灾后和加固后的力学性能分析提供参考。
In order to calculate the bearing capacity and flexural rigidity of SRC columns after fire and after rehabilitating and strengthening, the analytical procedure of the mechanical properties of steel reinforced concrete columns (SRC) post-fire and post-fire based on the continuity of fire and force is proposed. The finite element method was used to establish the corresponding analytical model. Taking a steel reinforced concrete column subjected to fire as an example, the bearing capacity and flexural rigidity of prestressed, post-fire and post-reinforced SRC columns were compared and analyzed. The flexural rigidity and the different axial load ratio under the ultimate flexural capacity of the fire after the loss rate and the rate of increase after reinforcement; axial load ratio of 0 to 0.4, the ultimate ultimate flexural capacity of the loss rate And the improvement rates were 4.1% ~ 6.4% and 3.9% ~ 9.1% respectively. The analytical procedure and method of this paper can provide a reference for the analysis of the mechanical properties of such structures after fire and after the reinforcement.