摘要
提出一种新型叠合梁结构———U形预制截面预应力混凝土叠合梁,探讨了其结构特点;介绍了国内外对预应力混凝土叠合梁抗裂度的研究概况;对U形预制梁制作、运输吊装阶段和叠合梁使用阶段开裂前的截面应力应变关系分别进行分析,在此基础上推导出相应阶段的正截面抗裂验算方法。
A new kind of composite beam, prestressed concrete composite beam with U-shaped preeast beam, is presented and its structural characters are discussed. Then the external and internal study on crack resistance of prestressed concrete composite beam is simply introduced. Based on the analysis of stress and strain on preeast beam section at manufacturing, transporting and assembling stages and composite beam section at using stage, calculating methods of normal section crack resistance at corresponding stage are presented in elastic theory.
出处
《四川建筑科学研究》
北大核心
2005年第5期9-11,共3页
Sichuan Building Science
关键词
U形预制梁
叠合梁
预应力混凝土
正截面抗裂
U-shaped precast beam
composite beam
prestressed concrete
normal section crack resistance
