【摘要】 武汉世界贸易大厦工程采用了两端固结超静定无粘结预应力混凝土变截面楼板结构，高跨比达1/52。这种楼板结构可以使弯矩分布合理，并可减轻楼板结构的重量，增大开间。本文简要介绍了该工程楼板结构的局部模型试验研究，建立了无粘结预应力混凝土变截面楼板结构的弹塑性全过程分析方法，计算结果与试验结果吻合较好。更多还原

【Abstract】 The prestressed slab with varying thickness using unbonded tendons was adopted in the floor structure of Wuhan World Trade Tower. The slab, with 1/52 height-span ratio, fixed at internal tube and outside frame tube structure. Using this type of slab, a more reasonable moment distribution can be obtained, and the floor weight is decreased with the increase of the space. The experimental study of the floor structure and the elastoplastic analysis method for the slab are addressed in this paper. Good agreement is reached between the enperimental results and those of the analysis.更多还原