轻钢与泡沫混凝土组合单向板破坏机理研究
发布时间：2018-09-18 07:09
【摘要】：本课题旨在研究轻钢与泡沫混凝土两种材料结合而成的新型组合楼板结构。泡沫混凝土常被作为保温材料用于建筑结构,其具有轻质、保温及耐火等优点,以泡沫混凝土为基本材料与轻钢组合,基于两种材料的特性提出了轻钢与泡沫混凝土组合楼板,并以轻钢与泡沫混凝土单向板作为基本研究内容,此种构件具有轻质、高强、抗震性强以及环保等特点,并解决了组合楼板中防火性能差的弊端。本文利用有限元与力学试验结合的研究方法,意在明确轻钢与泡沫混凝土组合单向板的破坏机理,其中研究内容主要包括:总结组合板各破坏阶段,观察裂缝开展情况,确定极限承载力,以及不同因素变量对组合板相关力学性能的影响,并为后续理论完善、公式推导研究工作提供理论依据。首先对轻钢与泡沫混凝土组合单向板进行设计,包括截面设计与构件尺寸等,结合有限元软件对构件进行建立模拟分析模型,继而对模型受力分析,利用已得到模拟数据指导试验,并用试验结果验证模拟的正确性。制作轻钢与泡沫混凝土组合单向板构件,设计组合板的力学受弯试验,通过观察组合板破坏过程,总结组合板各破坏阶段。得出组合板以受压区泡沫混凝土压碎为破坏标志,并具备延性破坏特征,整个破坏过程合理。对比模拟与试验相应数值,证明有限元在结构分析中的准确性。基于有限元在分析中的准确性,进一步利用其模拟分析了泡沫混凝土密度等级、轻钢强度、轻钢布置间距、分布横向板带间距和组合板保护层厚度对组合板承载力、整体刚度以及破坏机理的影响。本文所研究的内容均不考虑两种材料的滑移,在制作试验构件时,设置了充足的抗剪连接件,以减少滑移对结果的影响。
[Abstract]:The purpose of this paper is to study a new type of composite floor structure composed of light steel and foam concrete. Foam concrete is often used as thermal insulation material in building structure. It has the advantages of light weight, heat preservation and fire resistance. Based on the characteristics of two kinds of materials, the composite slab of light steel and foam concrete is put forward, in which foam concrete is used as the basic material and light steel is combined with light steel. Taking the unidirectional slab of light steel and foam concrete as the basic research content, this kind of component has the characteristics of light weight, high strength, strong seismic resistance and environmental protection, and solves the disadvantage of poor fire resistance in the composite floor. The purpose of this paper is to clarify the failure mechanism of composite unidirectional slabs of light steel and foam concrete by means of finite element method and mechanical test. The main contents of the research include: summing up the failure stages of composite slabs, observing the development of cracks, The ultimate bearing capacity and the influence of different factor variables on the related mechanical properties of composite plate are determined, and the theoretical basis is provided for further theoretical improvement and formula derivation. First of all, the composite unidirectional slab of light steel and foamed concrete is designed, including section design and component size, and the simulation analysis model is established with the finite element software, and then the stress of the model is analyzed. The simulation data are used to guide the experiment, and the experimental results are used to verify the correctness of the simulation. The composite unidirectional slab members of light steel and foam concrete were made and the mechanical bending test of composite slab was designed. The failure process of composite plate was observed and the failure stages of composite slab were summarized. It is concluded that the composite slab is damaged by crushing foam concrete in compression zone and has ductile failure characteristics, and the whole failure process is reasonable. The accuracy of finite element method in structural analysis is proved by comparing the corresponding numerical value of simulation and test. Based on the accuracy of finite element analysis, the bearing capacity of composite concrete is further analyzed by using its density grade, light steel strength, light steel arrangement spacing, transverse slab-belt spacing and composite plate cover thickness. The influence of overall stiffness and failure mechanism. In order to reduce the effect of slippage on the results, sufficient shear connectors are set up in order to reduce the effect of slippage on the results.
【学位授予单位】：吉林建筑大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU398.9
本文编号：2247163
[Abstract]:The purpose of this paper is to study a new type of composite floor structure composed of light steel and foam concrete. Foam concrete is often used as thermal insulation material in building structure. It has the advantages of light weight, heat preservation and fire resistance. Based on the characteristics of two kinds of materials, the composite slab of light steel and foam concrete is put forward, in which foam concrete is used as the basic material and light steel is combined with light steel. Taking the unidirectional slab of light steel and foam concrete as the basic research content, this kind of component has the characteristics of light weight, high strength, strong seismic resistance and environmental protection, and solves the disadvantage of poor fire resistance in the composite floor. The purpose of this paper is to clarify the failure mechanism of composite unidirectional slabs of light steel and foam concrete by means of finite element method and mechanical test. The main contents of the research include: summing up the failure stages of composite slabs, observing the development of cracks, The ultimate bearing capacity and the influence of different factor variables on the related mechanical properties of composite plate are determined, and the theoretical basis is provided for further theoretical improvement and formula derivation. First of all, the composite unidirectional slab of light steel and foamed concrete is designed, including section design and component size, and the simulation analysis model is established with the finite element software, and then the stress of the model is analyzed. The simulation data are used to guide the experiment, and the experimental results are used to verify the correctness of the simulation. The composite unidirectional slab members of light steel and foam concrete were made and the mechanical bending test of composite slab was designed. The failure process of composite plate was observed and the failure stages of composite slab were summarized. It is concluded that the composite slab is damaged by crushing foam concrete in compression zone and has ductile failure characteristics, and the whole failure process is reasonable. The accuracy of finite element method in structural analysis is proved by comparing the corresponding numerical value of simulation and test. Based on the accuracy of finite element analysis, the bearing capacity of composite concrete is further analyzed by using its density grade, light steel strength, light steel arrangement spacing, transverse slab-belt spacing and composite plate cover thickness. The influence of overall stiffness and failure mechanism. In order to reduce the effect of slippage on the results, sufficient shear connectors are set up in order to reduce the effect of slippage on the results.
【学位授予单位】：吉林建筑大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU398.9
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