任家骥       （江苏省建筑设计研究院 南京 210029）

[提要]  拱北口岸联检楼是迎澳门回归的重点工程项目之一。作者介绍了该工程大面积、大柱网、双向无粘结连续多跨预应力混凝土框架的结构设计。通过结构模拟试验和工程实测验证了理论分析的准确性。研究了多排柱刚度对框架梁预应力建立的影响、双向局部承压锚固节点构造。提出了以施加预应力为主的“以抗为主，抗放结合”原则达到建筑不设伸缩缝的具体设计要求。
[关键词]  口岸 联检楼 双向 无粘结预应力 模拟 不设伸缩缝

Gongbei Port joint-inspection building is one of the major projects to welcome the returning of Macao. Author introduces the structure design of this project, which is characterized with large area, large column bays, multi-span con'tinuing frames with two-way unbonded prestressed concrete. Theoretical analysis is proved valid through model experiments and in-site measurements. The influence of multi-row-columns' stiffeness to produce the prestressing force in frame girders are discussed, as well as the anchoring construction considering two-way local compression at the joints. To avoiding structure joints, which can expand or contract according to the change of temperature, prestressing method is applied in principle of"resisting combined with avoiding".
Keywords:  two-way; unbonded prestressed; structure joints; port joint-inspection building