型钢再生混凝土梁的抗弯性能试验及数值模拟研究
发布时间：2019-03-05 14:22
【摘要】：随着我国城镇化建设进程的发展,建筑废弃物的排放量不断增长,不仅导致了资源和土地的浪费,还造成了环境的污染。因此,再生混凝土的使用将成为建筑垃圾资源化利用的一种有效途径。但是由于再生混凝土的各项性能指标都低于普通混凝土,使得其结构性能也有所降低,严重阻碍了再生混凝土在实际工程中的应用。将再生混凝土用于钢-混凝土组合结构中,既发挥了组合结构承载力高、刚度大、抗震性能好等优点,又弥补了再生混凝土力学性能的缺陷,同时具有保护环境的重大意义。本文制作了4组型钢再生混凝土梁,研究型钢再生混凝土梁的抗弯性能;通过变换再生粗骨料取代率和配箍率,对型钢再生混凝土梁的变形情况及承载力变化进行分析。并根据试验数据,在现有型钢混凝土梁承载力计算规程的基础上,探讨了符合型钢再生混凝土的计算公式。本文还利用有限元软件ABAQUS对试验构件进行了非线性有限元分析,介绍了从选取材料模型、建立几何模型、划分单元、施加荷载和边界条件到求解的各个步骤,并将有限元分析结果与试验结果进行了比较。通过试验以及有限元结果分析,得出的主要结论如下:(1)与型钢普通混凝土梁的破坏形式相同,型钢再生混凝土梁也具有明显的弹性、开裂、屈服和极限4个受力阶段特点,型钢再生混凝土梁与型钢普通混凝土梁的受弯机理基本相同。(2)在配箍率相同的情况下,不同粗骨料取代率的型钢再生混凝土梁的极限承载力没有显著差别。(3)再生混凝土取代率相同的情况下,配箍率对型钢再生混凝土梁的极限承载力无明显影响,但是对型钢再生混凝土的裂缝发展有一定影响。(4)型钢再生混凝土梁基本符合平截面假定。(5)有限元分析结果与试验结果一致,ABAQUS可以用来分析其它因素对型钢再生混凝土梁抗弯性能的影响。
[Abstract]:With the development of urbanization in our country, the emission of construction waste is increasing, which not only leads to the waste of resources and land, but also causes the pollution of environment. Therefore, the use of recycled concrete will become an effective way of building waste resource utilization. However, because the performance index of recycled concrete is lower than that of ordinary concrete, the structural performance of recycled concrete is also reduced, which seriously hinders the application of recycled concrete in practical engineering. The use of recycled concrete in steel-concrete composite structures not only brings into play the advantages of high bearing capacity, high stiffness and good seismic performance of composite structures, but also makes up for the defects of mechanical properties of recycled concrete, and has great significance in protecting the environment at the same time. In this paper, four groups of steel recycled concrete beams have been made to study the flexural properties of steel recycled concrete beams, and the deformation and bearing capacity of steel recycled concrete beams have been analyzed by changing the substitution rate of recycled coarse aggregate and stirrups ratio. Based on the experimental data and on the basis of the existing rules for calculating the bearing capacity of steel reinforced concrete beams, the calculation formula of steel reinforced recycled concrete is discussed. In this paper, the nonlinear finite element analysis of the test member is carried out by using the finite element software ABAQUS. The steps of selecting material model, establishing geometric model, dividing element, applying load and boundary condition to the solution are introduced. The finite element analysis results are compared with the experimental results. Through the test and the finite element analysis, the main conclusions are as follows: (1) the failure form of the steel reinforced ordinary concrete beam is the same as that of the steel reinforced ordinary concrete beam, and the steel recycled concrete beam also has obvious elasticity and cracking. The bending mechanism of the steel-reinforced recycled concrete beam is the same as that of the ordinary steel-reinforced concrete beam. (2) under the same stirrups ratio, the bending mechanism of the steel-reinforced recycled concrete beam is the same as that of the ordinary steel-reinforced concrete beam. There is no significant difference in the ultimate bearing capacity of steel-reinforced recycled concrete beams with different substitution rates of coarse aggregate. (3) under the same replacement rate of recycled concrete, the stirrup ratio has no obvious effect on the ultimate bearing capacity of steel-reinforced recycled concrete beams. However, it has a certain effect on the crack development of steel-reinforced recycled concrete. (4) the steel-reinforced recycled concrete beam basically accords with the assumption of plane section. (5) the results of finite element analysis are consistent with the experimental results. ABAQUS can be used to analyze the effect of other factors on the flexural behavior of steel-reinforced recycled concrete beams.
【学位授予单位】：河北工程大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU398.9
本文编号：2434997
[Abstract]:With the development of urbanization in our country, the emission of construction waste is increasing, which not only leads to the waste of resources and land, but also causes the pollution of environment. Therefore, the use of recycled concrete will become an effective way of building waste resource utilization. However, because the performance index of recycled concrete is lower than that of ordinary concrete, the structural performance of recycled concrete is also reduced, which seriously hinders the application of recycled concrete in practical engineering. The use of recycled concrete in steel-concrete composite structures not only brings into play the advantages of high bearing capacity, high stiffness and good seismic performance of composite structures, but also makes up for the defects of mechanical properties of recycled concrete, and has great significance in protecting the environment at the same time. In this paper, four groups of steel recycled concrete beams have been made to study the flexural properties of steel recycled concrete beams, and the deformation and bearing capacity of steel recycled concrete beams have been analyzed by changing the substitution rate of recycled coarse aggregate and stirrups ratio. Based on the experimental data and on the basis of the existing rules for calculating the bearing capacity of steel reinforced concrete beams, the calculation formula of steel reinforced recycled concrete is discussed. In this paper, the nonlinear finite element analysis of the test member is carried out by using the finite element software ABAQUS. The steps of selecting material model, establishing geometric model, dividing element, applying load and boundary condition to the solution are introduced. The finite element analysis results are compared with the experimental results. Through the test and the finite element analysis, the main conclusions are as follows: (1) the failure form of the steel reinforced ordinary concrete beam is the same as that of the steel reinforced ordinary concrete beam, and the steel recycled concrete beam also has obvious elasticity and cracking. The bending mechanism of the steel-reinforced recycled concrete beam is the same as that of the ordinary steel-reinforced concrete beam. (2) under the same stirrups ratio, the bending mechanism of the steel-reinforced recycled concrete beam is the same as that of the ordinary steel-reinforced concrete beam. There is no significant difference in the ultimate bearing capacity of steel-reinforced recycled concrete beams with different substitution rates of coarse aggregate. (3) under the same replacement rate of recycled concrete, the stirrup ratio has no obvious effect on the ultimate bearing capacity of steel-reinforced recycled concrete beams. However, it has a certain effect on the crack development of steel-reinforced recycled concrete. (4) the steel-reinforced recycled concrete beam basically accords with the assumption of plane section. (5) the results of finite element analysis are consistent with the experimental results. ABAQUS can be used to analyze the effect of other factors on the flexural behavior of steel-reinforced recycled concrete beams.
【学位授予单位】：河北工程大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU398.9
【参考文献】
相关期刊论文 前1条
1 陈宗平;陈宇良;覃文月;薛建阳;漆成;;型钢再生混凝土梁受弯性能试验及承载力计算[J];工业建筑;2013年09期
相关硕士学位论文 前2条
1 张军;再生混凝土研究及再生混凝土柱力学性能分析[D];西南交通大学;2007年
2 廖鑫男;型钢再生混凝土组合梁受力性能的有限元分析[D];西安建筑科技大学;2013年
，本文编号：2434997
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