不同宽高比对钢绞线预应力混凝土梁的影响  

Effect of Different Width-height Ratios on Prestressed Concrete Beams with Steel Strands

作　　者：魏裕超 Wei Yuchao(Ningxia Fifth Construction Co.,Ltd.,Yinchuan,China)

机构地区：[1]宁夏第五建筑有限公司,宁夏银川

出　　处：《科学技术创新》2024年第24期173-176,共4页Scientific and Technological Innovation

摘　　要：为研究钢绞线预应力混凝土梁在不同宽高比下结构的变形特征,对相同跨度、相同配筋率的钢绞线预应力混凝土梁采用一端固定一端张拉的施工方法,分析了宽高比分别为1/2、9/20、2/5、7/20、3/10时结构的整体变形、张拉端变形、张拉端应力以及张拉端混凝土塑性损伤。研究结果表明:采取不同的宽高比对固定端混凝土的截面应力、混凝土塑性损伤影响显著,宽高比低于7/20时结构变形会显著增加。To study the deformation characteristics of steel strand prestressed concrete beams with different width-to-height ratios,a construction method with one end fixed and one end tensioned was used for steel strand prestressed concrete beams with the same span and the same reinforcement ratio.The overall deformation,tensioned end deformation,tensioned end stress,and tensioned end concrete plastic damage of the structures were analyzed for width-to-height ratios of 1/2,9/20,2/5,7/20 and 3/10.The research results indicate that adopting different width-to-height ratios significantly affects the sectional stress and concrete plastic damage at the fixed end.When the width-to-height ratio is lower than 7/20,the structural deformation increases significantly.

关 键 词：预应力混凝土 结构变形 塑性损伤 

分 类 号：TU378[建筑科学—结构工程]