预应力混凝土梁的灰关联抗剪经验公式  

Empirical Formula Based on Prestressed Theory for Diagonal Shear Strength of Prestressed Concrete Beams

作　　者：杨军平[1] 赵艳林[2] 吕海波[1] 

机构地区：[1]广西大学土木工程学院,南宁530004 [2]桂林工学院土木工程系,广西桂林541004

出　　处：《桂林工学院学报》2005年第4期450-454,共5页Journal of Guilin University of Technology

基　　金：广西自然科学基金资助项目(桂科自0447095);广西区教育厅科研项目([2003]22);广西大学重大科研项目(2003ZD03)

摘　　要：根据国内外预应力混凝土梁斜截面抗剪承载力试验资料,利用灰色关联分析,得出各可能影响因子对预应力混凝土梁斜截面抗剪承载力影响程度的大小排序.选择其中的优势关联因子,以其关联系数为标准来划分重要性程度.在此基础上应用层次分析法(AHP)确定优势因子的权重,然后对样本数据库进行加权回归分析,得出自己的建立在灰色系统理论基础上的经验公式.经检验,该公式与实测值吻合良好,且离散度较小.Based on the test data of hundreds of prestressed concrete beams, this paper studies the probable factors that influence the ultimate shear strength of chose beams. Those factors are analyzed by correlation analysis of grey system theory. The analysis shows which is the first factor influences the ultimate shear strength and which one is the next. The factors that have the better correlation are chosen in the analytic hierarchy process （AHP） to decide the weight of the factors. Then the specimen-data-base is analyzed by regression analysis with increased-weigh. At last an empirical formula, based on the grey-system theory, is obtained. The calculated result of this empirical formula is identical better than the measured result.

关 键 词：灰关联分析 斜截面抗剪承载力 回归分析 层次分析法(AHP) 

分 类 号：TU378.1[建筑科学—结构工程]