体外预应力波形钢腹板组合箱梁徐变性能研究  

Study on the Creep Behavior of Externally Prestressed Composite Beam with Corrugated Steel Webs

作　　者：李立峰[1] 王芳[1] 刘志才[1] 

机构地区：[1]湖南大学土木工程学院,湖南长沙410082

出　　处：《湖南大学学报（自然科学版）》2008年第5期1-5,共5页Journal of Hunan University:Natural Sciences

基　　金：湖南省自然科学基金资助项目(02JYY3058)

摘　　要：为了研究体外预应力波形钢腹板组合箱梁在长期荷载作用下的徐变性能,制作了2根模型梁,通过205 d的持续静态观测,得到其徐变应变和徐变变形的变化规律;采用徐变率法,结合不同的混凝土规范进行了徐变效应的分析,理论结果和实测结果吻合较好;并针对徐变的影响因素进行了参数分析,结果表明:相对普通混凝土箱梁而言,波形钢腹板组合箱梁能有效减小长期徐变引起的反拱.In order to do research on the creep behavior of the externally prestressed composite box girder with corrugated steel webs, two model beams were made, and a 205 d sustain static observation was done to obtain the creep regularity of these beams. The method of creep velocity and four specifications were applied to analyze the creep behavior. Results of theoretical analysis and model test were in good agreement. Parametric studies were conducted to examine the influencing factor. The results have indicated that the camber of the composite box-girder with corrugated steel webs is less than that of the concrete box girder.

关 键 词：桥梁工程 波形钢腹板组合箱梁 徐变 模型试验 有限元 

分 类 号：TU448.21[建筑科学—岩土工程]