BI-DIRECTIONAL PSEUDODYNAMIC TEST OF A FULL-SIZE THREE STOREY STEEL CONCRETE BUILDING WITH RIGID AND SEMIRIGID JOINTS

摘要

The PsD testing technology has been successfully extended to bi-directional excitation of real-size buildings by implementing the test modelling and procedure described in the paper. Some important features of the methodology are: 1. The capability of imposing large displacements by means of a rigorous geometrically non-linear transformation between actuator co-ordinates and floor generalised co-ordinates. 2. The ability to use more than 3 actuators and control displacement transducers per floor by applying a stable and accurate control strategy which guarantees suitable distribution of the forces among the actuators. 3. The development of a new, flexible software structure through separation of high-level tasks and real-time tasks which communicate through a dual-RAM interface module. The high-level tasks, comprising the geometric transformation and the time integration, are written in MATLAB (interpreted language) while the real-time tasks are programmed and compiled in C. The performed seismic test on a 3-storey steel-concrete composite building gave useful information about the seismic behaviour of that type of structure and served to show the applicability of the proposed testing technology for large-size specimens. The random burst test executed dynamically and pseudodynamically on that specimen gave information on the reliability of the PsD methodology.