一种降低混凝土弹性压缩预应力损失的方法  

A Method for Reducing the Prestress Loss due to Elastic Compression of Concrete

作　　者：吴培峰[1] 郑步全[1] 陈艾荣[1] 

机构地区：[1]同济大学桥梁工程系,上海200092

出　　处：《中南公路工程》2006年第5期48-51,共4页Central South Highway Engineering

摘　　要：根据弹性变形的可恢复特性,提出一种利用临时预应力钢束放松时产生的弹性恢复变形,来减小由于混凝土弹性压缩引起的预应力损失的方法。给出了考虑临时束作用的弹性压缩损失计算公式,着重介绍了可供工程应用的简化计算方法。通过算例验证了该方法的有效性,对在工程中的具体应用给出了建议,并提出需要进一步研究的问题。In this paper, a method is given for reducing the prestress loss caused by elastic compression of concrete by using the recoverable property of elastic deformation. When the temporary tendons are loosened, the elastic compressive deformation of concrete is recovered. Calculation formulas considering the effects of the temporary tendons are presented. Simplified calculation method for engineering application is emphatically introduced. The effectualness of the method is verified by an engineering sample. Suggestions for engineering application and the further research directions of the method are also brought forward.

关 键 词：预应力混凝土 预应力损失 弹性压缩 后张法构件 临时束 简化计算 

分 类 号：U448.217[建筑科学—桥梁与隧道工程]