花纹型钢—混凝土组合结构粘结滑移性能推出试验研究
发布时间：2018-11-09 13:46
【摘要】：本文在传统型钢混凝土结构粘结滑移性能研究的基础上,提出了一种利用花纹钢板制作而成的花纹型钢混凝土组合结构,旨在通过型钢表面凸起花纹提高两种材料之间的粘结性能,增加整体性。设计制作了13个推出试件,着重研究花纹凸起高度、花纹设置位置和横向配箍率三个因素对花纹型钢混凝土组合结构的粘结滑移性能的影响。通过推出试验,获取了各个试件加载端的荷载-滑移曲线,以及各个荷载条件下沿型钢锚固深度的应变大小;对加载过程中的现象进行记录和对比,并对试验所获得的曲线进行了分析;归纳得到了各试件在加载过程中的共性,在此基础上定义了加载过程中各个受力阶段以及特征粘结强度,并且总结了应变的基本分布规律。结合钢筋混凝土结构中,钢筋与混凝土之间的粘结机理,对花纹型钢与混凝土之间的粘结机理进行了阐述。分析了上述三个试验因素对特征粘结强度的影响,并运用统计回归的方法,得到了特征粘结强度的计算公式;采用三段线数学模型,对平均粘结强度-加载端滑移量((?)-Sl)曲线进行了拟合,将拟合所得曲线与试验曲线进行对比可知,拟合效果较好。根据加载端的荷载,滑移量及沿型钢锚固深度的应变大小,推算得到了沿花纹型钢各个位置处的滑移量和应力大小,绘制了局部粘结力-滑移量(τ-S)的分布曲线。以平均粘结应力-加载端滑移量曲线为基准,利用相似性关系,引入位置函数F(x)和G(x)来描述局部粘结应力-滑移量曲线簇τ=τ(S,x),得到了考虑位置变化的本构关系。
[Abstract]:Based on the study of the bond-slip behavior of the traditional steel reinforced concrete structure, this paper presents a kind of patterned steel reinforced concrete composite structure made of patterned steel plate. The purpose of this paper is to improve the bonding property and increase the integrity of the two materials by means of protruding patterns on the surface of section steel. Thirteen rolling specimens were designed and made. The effects of three factors, such as the height of pattern protruding, the position of pattern setting and the ratio of transverse hoop, on the bond-slip properties of the composite structure were studied. The load-slip curves at the loading end of each specimen and the strain magnitude of the anchoring depth along the section steel under different load conditions are obtained by the deducing test. The phenomena in the loading process are recorded and compared, and the curves obtained from the test are analyzed. The generality of the specimens in the loading process is summarized. On this basis, the stress stages and the characteristic bond strength during the loading process are defined, and the basic distribution law of the strain is summarized. Based on the bond mechanism between steel and concrete in reinforced concrete structure, the bond mechanism between pattern steel and concrete is expounded. The influence of the above three experimental factors on the characteristic bond strength is analyzed, and the formula for calculating the characteristic bond strength is obtained by using the statistical regression method. The average bond strength (?)-Sl) curve was fitted by a three-segment line mathematical model. By comparing the fitted curve with the experimental curve, the fitting effect was good. According to the load at the loading end, the slip amount and the strain magnitude along the anchor depth of the section steel, the slip amount and the stress magnitude at each position along the pattern section steel are calculated, and the distribution curve of the local adhesion and slip quantity (蟿 -S) is drawn. Based on the average bond stress-load slip curve, the position function F (x) and G (x) are introduced to describe the local bond stress-slip curve cluster 蟿 = 蟿 (SX) by using the similarity relation. The constitutive relation considering the change of position is obtained.
【学位授予单位】：合肥工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU398.9
[Abstract]:Based on the study of the bond-slip behavior of the traditional steel reinforced concrete structure, this paper presents a kind of patterned steel reinforced concrete composite structure made of patterned steel plate. The purpose of this paper is to improve the bonding property and increase the integrity of the two materials by means of protruding patterns on the surface of section steel. Thirteen rolling specimens were designed and made. The effects of three factors, such as the height of pattern protruding, the position of pattern setting and the ratio of transverse hoop, on the bond-slip properties of the composite structure were studied. The load-slip curves at the loading end of each specimen and the strain magnitude of the anchoring depth along the section steel under different load conditions are obtained by the deducing test. The phenomena in the loading process are recorded and compared, and the curves obtained from the test are analyzed. The generality of the specimens in the loading process is summarized. On this basis, the stress stages and the characteristic bond strength during the loading process are defined, and the basic distribution law of the strain is summarized. Based on the bond mechanism between steel and concrete in reinforced concrete structure, the bond mechanism between pattern steel and concrete is expounded. The influence of the above three experimental factors on the characteristic bond strength is analyzed, and the formula for calculating the characteristic bond strength is obtained by using the statistical regression method. The average bond strength (?)-Sl) curve was fitted by a three-segment line mathematical model. By comparing the fitted curve with the experimental curve, the fitting effect was good. According to the load at the loading end, the slip amount and the strain magnitude along the anchor depth of the section steel, the slip amount and the stress magnitude at each position along the pattern section steel are calculated, and the distribution curve of the local adhesion and slip quantity (蟿 -S) is drawn. Based on the average bond stress-load slip curve, the position function F (x) and G (x) are introduced to describe the local bond stress-slip curve cluster 蟿 = 蟿 (SX) by using the similarity relation. The constitutive relation considering the change of position is obtained.
【学位授予单位】：合肥工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU398.9
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