轻钢与泡沫混凝土组合结构粘结滑移规律研究

发布时间：2018-01-03 11:22

本文关键词：轻钢与泡沫混凝土组合结构粘结滑移规律研究　出处：《吉林建筑大学》2017年硕士论文　论文类型：学位论文

【摘要】：型钢混凝土组合结构是一种由型钢与混凝土组合而成的新型结构体系,该组合结构充分发挥了钢材和混凝土各自的优良性能,具有材料利用更充分、抗震性能好以及施工方便等优点。但是,国内外关于型钢泡沫混凝土组合结构的研究尚属于起步阶段,为此本文参照国内外型钢与混凝土的粘结试验,进行了型钢泡沫混凝土组合结构的试验研究。首先,本文选取推出试验作为本课题的试验研究方法。本文针对C型钢泡沫混凝土组合构件的界面力学性能一共设计了40个试件,研究密度、孔间距和横向肋板设置个数等3个因素对C型钢泡沫混凝土粘结滑移性能的影响。通过在试验中对试件的观察,总结出了各个试件的界面破坏形态。随后通过对实测数据的处理和分段拟合,本文得到了C型钢与泡沫混凝土的粘结滑移本构关系。同时,我们通过对试验数据的分析得到了每个试件的初始滑移粘结强度、极限粘结强度、残余粘结强度。根据试验中得出的这些特征值粘结强度,本文利用Excel软件绘出了不同因素下特征值粘结强度的变化规律曲线,并对这些曲线进行拟合,得到了特征粘结强度与影响因素之间的关系方程,然后对得到的关系方程进行误差分析,发现其与试验结果吻合较好。最后,通过有限元软件对推出试验进行数值模拟,系统的总结了C型钢与泡沫混凝土粘结滑移的有限元建模分析和计算方法。为了全面考虑C型钢与泡沫混凝土之间的相互作用,本文采用了三个非线性弹簧单元分别模拟了C型钢与泡沫混凝土三个方向(法向、横向切向、纵向切向)之间的相互作用,最后将模拟结果与试验结果进行对比,发现两者吻合较好,验证了模型的准确性。
[Abstract]:Steel reinforced concrete composite structure is a new type of structure system which is composed of steel and concrete. The composite structure gives full play to the excellent performance of steel and concrete, and has more full use of materials. However, the research on steel foam concrete composite structure at home and abroad is still in the initial stage, so this paper refers to the bond test between steel and concrete at home and abroad. The experimental study of steel foamed concrete composite structure is carried out. First of all. In this paper, 40 specimens are designed for the interface mechanical properties of C-shaped steel foam concrete composite members, and the density is studied. The effects of three factors, such as hole spacing and the number of transverse ribbed plates, on the bond-slip behavior of C-shaped steel foamed concrete were studied. The interface failure morphology of each specimen is summarized, and then the bond-slip constitutive relationship between C section steel and foam concrete is obtained by processing the measured data and fitting them in sections. At the same time, the bond-slip constitutive relationship between C section steel and foam concrete is obtained. The initial slip bond strength, ultimate bond strength and residual bond strength of each specimen are obtained by analyzing the test data. In this paper, Excel software is used to draw the curve of the change law of the bond strength of the eigenvalue under different factors, and to fit these curves, the relation equation between the characteristic bond strength and the influencing factors is obtained. Then the error analysis of the relationship equation is carried out, and it is found that it is in good agreement with the test results. Finally, the numerical simulation of the deductive test is carried out by finite element software. The finite element modeling analysis and calculation method of bond slip between C section steel and foam concrete are summarized systematically in order to consider the interaction between C section steel and foam concrete. In this paper, three nonlinear spring elements are used to simulate the interaction between C shape steel and foam concrete in three directions (normal, transverse, longitudinal). Finally, by comparing the simulation results with the experimental results, it is found that the two results are in good agreement with each other, and the accuracy of the model is verified.
【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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