铁尾矿砂浮石混凝土多孔砖砌体墙抗震性能的有限元研究

Finite Element Study on Aanti-seismic Property of Porous Brick Masonry Walls Made of Iron Tailings Pumice Concrete

应用有限元软件ABAQUS来模拟铁尾矿砂浮石混凝土多孔砖砌体墙的抗震性能,采用低周反复加载的方式进行分析。模型的控制变量为竖向压应力、高宽比以及有无构造柱,用ABAQUS有限元来分析得到其滞回曲线、骨架曲线等数据。模拟结果分析表明:竖向压应力的增加可以提高砌体墙的抗侧承载力,但相应的变性能力得到了削弱;高宽比的增大,不仅使得砌体墙的抗侧承载力减小,同时也让其变形能力得到了削弱;构造柱的设置使得砌体墙的抗侧承载力提高明显,且相应的变形能力得到了很大的提升。

The development of lightweight aggregate concrete porous bricks is becoming more and more extensive.In this paper,the basic physical properties of lightweight aggregate concrete porous bricks are made of iron tailings as fine aggregate and pumice as coarse aggregate.Large finite element software ABAQUS was used to simulate the seismic behavior of the porous brick masonry wall of ferro-tailings pumice concrete.The material nonlinearity,geometric nonlinearity and contact nonlinearity of the model were considered.The control variables of the model were vertical compressive stress,aspect ratio and constructional column.The hysteresis curve,skeleton curve,displacement and load were obtained by ABAQUS finite element analysis.The simulation results show that the increase of vertical compressive stress can improve the bearing capacity of masonry walls,but the corresponding denatures-ability is weakened.The increase of aspect ratio not only reduces the bearing capacity of masonry wall,but also weakens its deformation capacity.The setting of the constructional column makes the lateral bearing capacity of the masonry wall increase obviously and the corresponding deformation capacity is greatly improved.