Shaking table test a hybrid spatial structure with engineering application

Abstract

Terminal building 2 in Shanghai pudong international airport is a novel hybrid spatial structure. The upper steel roof and lower reinforced concrete frame are assembled with Yshaped steel columns. Its total length and width are 414 and 150 miters, respectively. The special architecture form leads to a complex structure. It is significant to completely understand the overall structural behavior under moderate and strong earthquakes when designing this structure. In this regard, shaking table model test plays an important role in obtaining the overall dynamic characteristics, seismic responses and failure mechanism of targeted structure. The seismic response and performance of this hybrid spatial structure subjected to various earthquake inputs are investigated by shaking table test. A 1:35 scaled model structure is constructed and tested. The natural frequency, seismic responses including the relative displacement and the strain are investigated based on the test results. Some features are captured and discussed. Furthermore, weak positions under seldom-occurred earthquakes of seismic design intensity 8 are found based on the visible damages on the testing model, and some corresponding suggestions were proposed and applied to the engineering design of the structure under extremely strong earthquakes. The whole project was completed in 2006 and put into operation after then. The study attempts to provide some insights into the overall dynamic behavior of the new structural system and accumulates the experimental evidence for establishing related design guidelines for such complex hybrid spatial structures in the future.