【摘要】 采用大尺度预应力混凝土模型试验,研究斜拉桥在自重、竖向力、预应力和斜拉索拉力等作用下П形截面主梁剪力滞效应。试验结果表明,该种截面斜拉桥主梁剪力滞后现象不可忽视,并且梁中既有正剪力滞又有负剪力滞,各种外力的影响也不尽相同。更多还原

【Abstract】 By means of model test of a large scale prestressed concrete (PC) beam, this paper studies the shear lag effect of the PC main girder of a cable stayed bridge with П-shape cross section under self weight of the bridge structure, external vertical loads, prestressing force and stay cable forces. The test and study results indicate that the shear lag effect in the kind of girder cannot be neglected, the shear lag in the girder is both positive and negative, and the rules of the shear lag caused by different external loads are not always the same.更多还原