带边梁和异形柱无粘结预应力平板在竖向荷载作用下的试验研究

Experiment at study of unboundedly prestressed plate with boundary beam and special-shaped columns under vertical loads

通过缩尺比例为1∶2.4的模型试验,对无粘结预应力平板-异形柱结构竖向荷载一板八柱构件,分别针对预应力板、边梁、异形柱在竖向荷载作用下的裂缝形成和开展进行了初步研究,并同两个相同类型构件进行比较,对带边梁和异形柱无粘结预应力平板结构体系在竖向荷载作用下,不同的布筋形式、不同的预应力筋线形和不同的抗裂条件,以及梁柱节点区的锚固、平板挠度等诸多基本试验现象及受力特征作了分析和探讨.

Through a model test with a scale of 1：2.4, an unboundedly prestressed slab with boundary beam and 8 special-shaped columns is designed to study and analyse the prestressed slab behavior under vertical loads, with the especial focus on craks development in the course of various grade loads from prestressed slab to boundary beam to special shaped column. In contrast with two familiar members, discovery and analysis are emphsized on test phenomenon and mechnical characteristics about the system of unboundedly prestressed slab with boundary beam and special--shaped columns under vertical loads in many aspects. Different tendons layout, different tendon line style and different anti--crack conditions, anchor styles of joint between beam and column and deflection of slab are also mentioned.