摘要
论述了预应力筋两阶段工作原理，认为可以将预应力筋的工作分成两个阶段：将预应力混凝土结构分成有侧限和无侧限两大类，提出了侧限影响系数的概念，基于预应力筋两阶段工作原理，建立了无侧限及有侧限预应力混凝土结构的承载能力计算公式。提出了既能为工程界所接受，又能满足耐久性要求的预应力混凝土结构裂缝控制及验算建议，建立了通过裂缝控制计算确定预应力筋用量，通过承载力方程和构造要求计算确定非预应力筋用量的两类极限状态的直接设计方法。
Presents the two－stage－working principle established for prestressed steel by which，prestressed steel is positive at the first stage and equivalent loads steel are regarded as external loads (or dead loads)， and at the second stage，prestressed steel is only a kind of material that resists passively external loads just as a common steel，and prestressed concrete structures can essentially be classified into lateral restraint structures and non－lateral restraint structures，and the ultimate load－carrying capacity formula established for non－lateral restraint prestressed concrete structures and lateral restraint prestressed concrete structures，and discusses possible ways of control and check in prestressed concrete structures．
出处
《哈尔滨建筑大学学报》
北大核心
2001年第2期12-15,共4页
Journal of Harbin University of Civil Engineering and Architecture
基金
黑龙江省科委青年基金资助项目!(Q98-12)
黑龙江博士后科学研究基金资助项目
关键词
预应力混凝土结构
张拉
有效预应力
承载力
裂缝控制
prestress；concrete structures；stretch；effective prestress；lateral restraint； ultimate load－carrying capacity；controlling cracks
