A General Testing Scheme for On-line Hybrid Substructuring Simulation on Planar Moment Frames

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The on-line or pseudo dynamic test has been considered as a powerful tool for the earthquake simulation of building. The method computes the displacements of the structural system based on the dynamic analysis and drives the actuators with that response to measure the restoring forces directly from the test specimen. This criteria is perfectly applied to middle or high rise buildings with concrete stiff slabs or shear wall panels. In such a case the masses of the system are concentrated at the floor levels and the displacement on the elements are considered as a function of the mass associated lateral displacements. But in the case of steel frames composed of flexible beam-columns unbalanced forces appear in the non mass associated degree of freedom, and the representation of displacements as function of the lateral ones is not valid. In the present paper a general scheme for on-line hybrid substructuring simulation is presented, to achieve the deformed position of testing steel beam-column. This scheme uses a predictor of the incremental forces on the specimen. Three predictors are presented, the two component bi-linear predictor, the artificial neural network predictor, and the multi-spring joint predictor. A brief description of the applicability of the scheme in the hybrid analysis is presented. Also the transformations required to reach the general deformed configuration are shown. Three tests are presented to evaluate the different predictors and the applicability of the scheme; tests under controlled rotation and varying or constant axial load are described.
一般社団法人日本建築学会の論文
1995-03-20

A General Testing Scheme for On-line Hybrid Substructuring Simulation on Planar Moment Frames

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