预应力混凝土梁在地震作用下的损伤-破坏模型  

Damage-failure model of prestressed concrete beam under seismic action

作　　者：袁建力[1] 钱仲慧[1] 王仪[1] 徐宜和[1] 

机构地区：[1]扬州大学建筑科学与工程学院,江苏扬州225009

出　　处：《建筑结构学报》2006年第5期72-78,共7页Journal of Building Structures

基　　金：江苏省留学回国人员基金(苏教外2000392)

摘　　要：结构在地震作用下的损伤状况及其抵御破坏荷载的残余能力,是抗震优化设计和震后工程加固的重要依据。根据对预应力混凝土梁在不同荷载历程下的耗能、破坏特性的试验研究,本文提出了构件破坏的定义,给出了构件在循环荷载下的破坏弯矩与骨架曲线破坏弯矩的数学关系,建立了预应力混凝土梁在地震作用下的损伤-破坏模型。该模型综合了变形、能量累积以及荷载历程对预应力混凝土构件损伤-破坏的影响,对不同的地震模式有更好的适用性。Damaged condition and residual capability to resist failure load of a structure under seismic action are important for seismic optimum design and post-earthquake strengthening. Based on the experimental study of the energy dissipation and failure characteristics of prestressed concrete beams under different loading histories, this paper defines the failure of the member, presents a mathematical relationship between the failure moment under cycle loads and the failure moment of skeleton concrete under seismic action. This model synthesizes the effect of distortion, energy accumulation, and loading history to damage-failure of prestressed concrete member, thus may be applied to different earthquake patterns.

关 键 词：预应力混凝土 抗震鉴定 损伤-破坏 数学模型 

分 类 号：TU378.2[建筑科学—结构工程] TU313