预应力混凝土T梁受剪破坏试验研究

Experimental Study on the Shear Failure of Prestressed Concrete T Beams

预应力混凝土T梁受剪破坏影响因素较多.为研究预应力(预应力筋弯起角度和数量)和翼缘宽度对受剪破坏的影响,对10根预应力混凝土T梁进行了集中荷载作用下的受剪破坏试验,得到了受剪破坏试验现象、裂缝分布以及破坏形态.研究结果表明:增加预应力筋数量、增大翼缘宽度以及提高预应力筋弯起角度能提高T梁的极限抗剪承载能力.

There are many factors affecting the shear failure of prestressed concrete T beams.This paper investiages the effects of prestress(the bending angle and strands of a prestressing tendon)and flange width on shear failure.During the shear failure experiment,we designed 10 prestressed concrete T beams under concentrated load.We obtained data about the shear failure,fracture distribution and failure pattern.The data shows that the ultimate shear capacity of T beams can be improved by increasing the number of prestressing tendons,the flange width and the bending angle of prestressing tendons.