Pseudo-dynamic test and numerical simulation of a large direct air-cooling structure
Affiliation of Author(s):
土木工程学院
Journal:
The Structural Design of Tall and Special Buildings
Key Words:
中文关键字：无，英文关键字：direct air-cooling; pseudodynamic test; seismic pe
Abstract:
In this study, pseudodynamic test was performed to evaluate the seismic performance of air-cooling
structures built in the high-intensity earthquake fortification zones. The testing prototype was designed with
the scale factor of 1/8, and the structural responses subjected to five peak ground accelerations (PGAs) were
investigated followed by a cyclic test. Experimental results, including the lateral displacements, strains and
crack patterns, were recorded and presented. The experimental load–displacement hysteretic loops subjected
to the cyclic displacement history indicate that the direct air-cooling structure exhibits a good seismic
performance with a displacement ductility factor greater than 4. It is particularly noted that the structural
integrity is well enhanced by the inter-column connections, which are composed by using the steel truss
and diagonal braces, and these steel members mainly remain elastic throughout the testing process. The natural period and the equivalent viscous damping ratio of the first-order mode are also identified on the basis
of the test results, which are utilized to calibrate the finite element model. In addition, the predicted lateral
displacements based on a damaged plasticity model of concrete agree well with the experimental results.
Both the lateral bearing capacity and ductility of the model demonstrate that the direct air-cooling structure
meets the seismic design requirement with respect to the high-intensity earthquakes.
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