摘要
多年来先张法预应力空心板在中、小桥结构物中一直被广泛应用。但在设计回访中发现,部分空心板板底多存在有纵向裂缝的问题,为有效杜绝此弊病的发生,本文对其产生的原因进行了分析并提出了预防措施。。
Pretensioning method prestress hollow board is widely used in medium and small bridge structure. The portrait crack is found in the board to affect the beam integrity and stiffness. The crack will do harm to the concrete and steel bar so as to reduce the component＇ s usage life. This paper analyzes the causation and prevention methods of this kind of crack to prevent it.
出处
《林业科技情报》
2007年第4期82-83,共2页
Forestry Science and Technology Information
关键词
先张法预应力
纵向
裂缝
使用寿命
pretensioning method prestress
portrait
crack
usage life
