缓粘结部分预应力混凝土梁刚度试验研究  

Experimental Research on Rigidity of Retard-bonded Partially Prestressed Concrete Beams

作　　者：冯新[1] 周先雁[1] 

机构地区：[1]中南林业科技大学土木工程与力学学院,长沙410004

出　　处：《混凝土与水泥制品》2013年第5期52-56,共5页China Concrete and Cement Products

基　　金：湖南省建设科技计划项目(2006468-28)

摘　　要：缓粘结预应力混凝土是近二十年出现的一种新型独特预应力体系。为了解研究这一新型预应力混凝土构件的受力性能和使用性能,本文以手工的方式制作了缓粘结预应力筋,并对3根缓粘结部分预应力混凝土T形梁进行了短期刚度的试验研究和理论分析,在试验研究的基础上,结合试验梁的特性和国家现行标准规范,建立了缓粘结部分预应力混凝土梁短期刚度的计算公式。研究结果表明,按修正公式计算的挠度值与试验结果吻合较好,为这一新型预应力体系的实际应用提供了参考依据。Retard-bonded prestressed concrete which has appeared in recent twenty years is a new and distinctive prestressed system. For the research on mechanical behavior and service property of retard-bonded prestressed concrete members, retard-bonded prestressed strands are made by manual work in this paper. Experimental research and theoretical analysis on short-term stiffness of three retard-bonded partially prestressed concrete T-beams are carried out under static loadings. Based on the experiment research, connected with the characteristic of test beams and the national current standard, the calculation formulas on the short-term stiffness of retard-bonded partially prestressed concrete T-beams are proposed. The results show that the calculated values given by the modified formulas are identical with the test results, which provides theoretical reference for the actual project application of the new retard-bonded prestressed concrete system.

关 键 词：缓粘结 部分预应力混凝土T梁 短期刚度 试验研究 

分 类 号：TU317[建筑科学—结构工程]