预应力混凝土简支迭合梁在均布荷载下的抗剪性能

SHEARING BEHAVIOUR OF SIMPLY SUPPORTED P.C. COMPOSITE BEAMS UNDER UNIFORMLY DISTRIBUTED LOADS

本文介绍了预应力混凝土简支迭合梁的抗剪强度试验,分析了在均布荷载作用下迭合梁的正截面变形特点,迭合梁正、斜截面裂缝开展过程和斜截面破坏机理。为了计算均布荷载下梁的抗剪强度,引入了等效剪跨比的概念。推导出了均布荷载作用下预应力混凝土简支迭合梁的斜截面抗剪强度计算公式。

This paper introduees the experiment on shearing strength of simply supported P. C. com positebeams, analyzes the characters of cross-section deformation, the development of cracks and the mecha-nism of inclined-section collapse under uniformly distributed loads for calculating the shearing strengthof beams under uniform loads, the concept of equivalent shear-span ratio is introduced, the formula tocalculate the shearing strength of P. C. composite beams under uniform loads is derived.