大跨预应力混凝土楼盖结构选型研究

Study on Structural Layout Choice of Large-span Prestressed Concrete Floor

大跨预应力混凝土楼盖结构形式多种多样,不同的楼盖结构,需要选择不同受力性能的结构形式.以郑州国际会展中心展览部分大跨预应力混凝土楼盖为研究对象,分别讨论了主次梁结构、次梁承重结构以及井字梁结构3种结构形式5种不同的结构布置方式,并对其进行了分析计算.针对各结构布置方案的受力特点,通过对5种不同布置方式的预应力筋用量、结构内力以及变形的分析,结果表明,对于此类双向跨度相差不大的结构,井字梁方案较优该结论为正确选择结构布置方案,优化楼盖结构方案提供依据.

There are various styles of large-span prestressed concrete floor. Different floor need suitable structural layout of different structural behavior. This paper selects the floor structure arrangement of ZZICEC, and calculats 5 floor framing systems of RC floor system,the long prestressed span beam system and the concrete cross-beam system. Through the analysis of the static behavior and the comparison of the merits and faults, the reasonable structure arrangement of the floor structure can be acquired. This paper can also be useful for such large span prestressed concrete floor.