无粘结部分预应力混凝土叠合梁变形灰关联分析

Grey Correlation Analysis of Deflection on Unbounded Partially Pre-stressed Concrete Composite Beams

针对目前无粘结部分预应力混凝土叠合梁试验数据少、较难应用传统统计方法进行分析的现状,将灰关联分析方法引入到无粘结部分预应力混凝土叠合梁变形和相关因素的相关性分析中,分析了各关联因素的相关性,得出各可能影响因素对无粘结部分预应力混凝土叠合梁变形影响程度的大小排序。结果表明,对无粘结部分预应力混凝土叠合梁变形影响最大的是预应力钢丝面积、有效预应力、预制梁混凝土立方体强度等级,其次是叠合层混凝土立方体强度等级,影响最小的因素是叠合特征参数。

Due to the fact that there are few experimental data of the unbounded partially pre-stressed compositebeams and they can not be analyzed by the traditional statistical method, the grey relational analysis is introduced into the relative analysis of the deflection of the unbounded partially pre-stressed composite beams and correlation factors. The paper discusses the relativity of correlation factors and obtains the possible factors on the influence degree of the unbounded partially pre-stressed composite beams. The result shows that the first factors that influence the deflection of the unbounded partially pre-stressed composite beam should be the pre-stressed steel wire area, virtual pre-stressed, pre-cast concrete strength grade; and then the strength grade of the composite concrete cuboids,the composite characteristic parameter has the least influence.