新型装配式建筑泡沫混凝土剪力墙抗震性能有限元分析

Finite Element Analysis of Seismic Performance of Foamed Concrete Shear Walls of New Assembled Buildings

针对目前国内限制外墙保温材料的问题,提出一种装配式泡沫混凝土剪力墙构件,并利用ABAQUS有限元软件建立一种泡沫混凝土塑性损伤模型(CDP模型),对比试验结果验证泡沫混凝土CDP模型的正确性并通过参数拓展分析评价不同轴压比下装配式泡沫混凝土剪力墙在地震作用下的耗能能力。模拟结果表明:泡沫混凝土CDP模型参数设置准确,可以有效模拟泡沫混凝土在进入塑性以后的力学行为;随着轴压比的增加泡沫混凝土剪力墙极限承载能力提高,耗能能力下降,刚度与强度退化情况更加严重;综合各项性能表现得到符合工程实际中的最优轴压比μ为0.5。

Aiming at solving the problem of limiting external wall insulation materials in China at present,a prefabricated foam concrete shear wall component is proposed,and a plastic damage model of foam concrete(CDP model)is established using ABAQUS finite element software.The test results show that the correctness of the CDP model of foam concrete is verified,and the energy dissipation capacity of prefabricated foam concrete shear wall under different axial compression ratios is evaluated through parameter expansion analysis.The simulation results show that the CDP model parameters of foam concrete are set accurately,which can effectively simulate the mechanical behavior of foam concrete after entering the plastic state;With the increase of axial compression ratio,the ultimate bearing capacity of foam concrete shear wall increases,the energy dissipation capacity decreases,and the stiffness and strength degradation becomes more serious;the optimal axial pressure ratioμis 0.5,which is consistent with the actual performance of the project.