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为满足大空间的建筑功能要求,上海裕年国际商务大厦工程采用预应力混凝土叠层转换桁架,无论是桁架的跨度还是其所承受的竖向荷载数值在国内同类转换构件中都属罕见,是整个结构设计和施工的技术关键。介绍了该工程预应力混凝土叠层桁架转换构件的设计原则,并进行了一榀1∶8比例预应力混凝土叠层桁架转换结构的静力性能的试验研究,对其破坏形态、承载力、变形性能等进行了研究。试验结果表明,按“强受压斜腹杆、强节点”设计的预应力混凝土叠层桁架转换构件能够满足承载力和变形的要求,且在使用阶段处于弹性工作状态。在试验和分析的基础上,提出了预应力混凝土叠层桁架转换构件的设计建议,可供实际结构设计时参考。
In order to satisfy the requirement of building function in large space, the construction of Shanghai Yu-nian International Business Building uses prestressed concrete laminated truss, which is rarely found in domestic similar conversion members whether it is the span of truss or the vertical load value it is subjected to The whole structure of the design and construction of the key technology. The design principle of the converted component of prestressed concrete laminated truss was introduced and the static performance of a 1: 8 ratio prestressed concrete truss conversion structure was studied. The failure modes, bearing capacity, deformation Performance, etc. were studied. The test results show that the prestressed concrete truss transfer members designed by “strong compression webs and strong joints” can meet the requirements of bearing capacity and deformation, and are in elastic working condition during the use phase. Based on the experiment and analysis, the design suggestion of the prestressed concrete truss transfer member is put forward, which can be used for the reference of the actual structure design.