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上海裕年国际商务大厦为带巨型叠层桁架转换层的高层建筑结构,属于复杂高层建筑结构。预应力混凝土叠层转换桁架的跨度和其所承受的竖向荷载均很大,是整个结构设计和施工的技术关键。为了研究该结构的整体抗震性能,进行了一个1∶25缩尺模型的振动台试验,研究了模型结构的动力特性,以El Centro波、Pasadena波和Shw2002波为输入地震波,分别按设防烈度7度多遇、基本、罕遇、超罕遇以及8度罕遇、超罕遇地震作用进行试验,研究了模型结构在各阶段地震作用下的加速度、位移和应变反应,以及结构的破坏形式和破坏机理。试验结果表明,模型结构能满足7度抗震设防的“小震不坏”和“大震不倒”的设计要求,8度超罕遇地震作用下结构仍不倒塌,结构具有良好的抗震性能。在7度多遇、基本以及罕遇地震作用下,预应力混凝土叠层转换桁架基本处于弹性状态。
Shanghai Yu-nian International Business Building is a high-rise building structure with a massive laminated truss conversion floor, belonging to a complex high-rise building structure. The span of prestressed concrete laminated truss and its vertical load are great, which is the key technology of the whole structure design and construction. In order to study the overall seismic performance of the structure, a 1:25 scale model shaking table test was carried out to study the dynamic characteristics of the model structure. El Centro waves, Pasadena waves and Shw2002 waves were used as input seismic waves, respectively, according to fortification intensity 7 The experiments were carried out to investigate the acceleration, displacement and strain response of the model structure under earthquake action at various stages, as well as the failure forms of the structure and Damage mechanism. The experimental results show that the structure of the model can meet the design requirements of “small earthquake” and “large earthquake without inversion” of 7 degree seismic fortification, and the structure does not collapse under the effect of the earthquake of magnitude 8 Seismic performance. Under the circumstance of more than 7 degrees, basic and rare earthquakes, the prestressed concrete laminated truss is basically in elastic state.