预应力水平曲线转换梁的试验研究和应用

预应力水平曲线转换梁属压弯剪扭复合受力构件,其设计与施工困难.而国内外对之研究甚少.因此本文在对预应力曲线梁的受力特点和预应力配筋形式进行研究的基础上,结合实际工程对预应力箱形和矩形截面曲线转换大梁结构进行了试验研究,并提出预应力曲线转换梁设计与施工时应注意的事项,以供参考.

STUDY AND APPLICATION OF HORIZONTALLY CURVED PRESTRESSED TRANSFER GIRDERS

Horizontally curved prestressed transfer giders are memjbers subjected to combined action of compression, bending, shear and torsion. There are difficulties in designing and constructing this kind of members. Nevertheless, people are seldom to make research into this subject. This paper deals with the research on the charteristics of intemal foree and the prestressed tendon shape of the horizontally curved prestassed tarefer girders. The calculaion method of frichon loss of spatially curved prestrssed tendons is also suggested. Experiments on boxed asetion and rectangular sechon pnsnd curved be gidri, designed in accordance to a real project, are carried out with some practical results obtained, This paper may be served as a reference for the analysis and design of this kind of transfer girders.