在弯曲、扭转和剪切复合变形下的预应力混凝土工字梁

Prestressed Concrete I-beams under Combined Mixed Torsion,Flexure and Shear

弯、剪、扭复合作用下的予应力工字梁,由于翘扭变形的存在,使得对它进行理论研究和实验研究非常困难。国内过去对矩形梁和T形梁进行过实验研究,在国际上这类复合变形的研究资料也少见。本文对弯、剪、扭复合作用下的八种子应力混凝土工字梁进行了试验研究,并以此为基础提出了一处简化计算方法,且将这种方法与当前流行的“特里曼方法”和“艾夫格隆方法”计算结果进行比较,结果说明本文提出的方法更接近实验结果。因此本成果更具有工程实际意义。

Owing to the existing warping torsion,it has been rather difficult to make a theoretical and experimental study of the prestressed concrete I -beams under combined mixed torsion. flexure and shear. The experimental study has been made of the rectangular beams and T-beams at home, but there is still little information available abroad concerning this kind of complex deformation. And accordingly a simple calculation method is proposed. Compared with the present popular 'Th(?)rlimarn method' and 'Elfgren method',the method proposed here has been illustrated to conform better with the experimental resulfs. thus having much more significance in the field of engineering.