后张法预应力混凝土T梁的极限承载力研究  

Research of Ultimate Load of Post-tensioning Prestressed Concrete T Beam

作　　者：梁清宇[1,2] 张剑[3] 方太云[4] 朱金华[3] 

机构地区：[1]浙江省水利河口研究院,浙江杭州310020 [2]浙江广川工程咨询有限公司,浙江杭州310020 [3]南京航空航天大学,江苏南京210016 [4]江苏省交通运输厅工程质量监督局,江苏南京210001

出　　处：《新技术新工艺》2016年第7期43-45,共3页New Technology & New Process

基　　金：浙江省水利厅科技项目(RC1445)

摘　　要：钢筋混凝土结构通常由钢筋和混凝土等2种材料组成,正确描述这2种材料的本构关系是准确进行结构分析的关键。非线性分层单元是将1个壳单元划分成若干层,各层可以根据需要设置不同的厚度和材料属性。算例分析表明,非线性单元进行有限元分析得到的试验梁跨中截面荷载挠度曲线与试验值符合较好,且结构破坏时的荷载吻合程度也良好。表明采用该单元对结构的受力行为,特别是结构开裂后的受力行为进行分析,具有较高的可靠性和稳定性。该研究方法可供工程设计参考。Reinforced concrete structures are usually composed of steel and concrete.Correctly describing the constitutive relation of these two materials is important to analyze structure accurately.In nonlinear layered element,a shell element is divided into several layers.According to the need,each layer can be set different thickness and material property.Through the nonlinear element in finite element analysis,load deflection curves of the test beams are in good agreement with the experimental results.When the structure is damaged,the degree of the load of calculated results agrees well with the test results.It is showed that the stress behavior of the structure is highly reliable and stable when the structure is on stress or the structure is cracked.The research method of this paper can be used for engineering design.

关 键 词：预应力 混凝土T梁 极限承载力 荷载挠度曲线 

分 类 号：U441[建筑科学—桥梁与隧道工程]