外贴FRP加固预应力混凝土梁正常使用极限状态研究  

Study of Prestressed Concrete Girders Strengthened with Externally Bonded FRP in Serviceability Limit State

作　　者：叶文亚[1] 管仲国[1] 李建中[1] 

机构地区：[1]同济大学桥梁工程系,上海200092

出　　处：《桥梁建设》2007年第5期69-72,共4页Bridge Construction

摘　　要：对外贴FRP加固预应力混凝土桥梁正常使用极限状态的抗裂和变形性能进行初步研究。在线弹性混凝土本构模型假定的基础上,推导考虑纤维预张应力影响的性能指标计算公式,并分析纤维预张应力对正常使用极限状态性能指标的加固意义。在此基础上,分析线弹性混凝土本构假定的模型误差及性能指标对非线性混凝土本构模型的参数敏感性,进而提出相应的修正计算方法。This paper conducts a preliminary study of crack resistance and deformation behavior of prestressed concrete girders strengthened with externally bonded FRP in serviceability limit state. On the basis of assumptions of linear elastic concrete constitutive model, the paper deduces the equations for performance indices of the girders in which the effect of fiber prestressing is considered, analyzes the significance of strengthening of the fiber prestressing to the performance indices in the serviceability limit state and further analyzes the errors of the assumptions of the linear elastic concrete constitutive model, the sensitivity of the performance indices to the non-linear concrete constitutive model, and also gives the calculation methods for the corresponding modifications.

关 键 词：预应力混凝土梁 FRP 桥梁加固 正常使用极限状态 计算方法 

分 类 号：TU378.2[建筑科学—结构工程] U445.72[建筑科学—桥梁与隧道工程]