Variation of Dynamic Properties of Mexican Low-Cost Housing Buildings with Level of Seismic Motion

Abstract eng:
In order to evaluate the dynamic behavior of housing buildings made of confined masonry in Mexico, a series of shaking-table tests on small-scale models were conducted at the Institute of Engineering at the UNAM. Specimens were half -scale models made of handmade solid clay bricks. A similarity model for ultimate strength was selected as the basis for scaling. These were subjected to a series of seismic motions typical to the epicentral region along the Mexican Pacific. The experimental response of one-, two- and three-story models is compared. Resistant mechanisms were identified through the analysis of recorded and observed results. Structural capacity was assessed in terms of strength, stiffness, deformation capacity and energy dissipation. Shear deformations contro lled the response of the models. Based on the failure mode observed, the analytical model for design and assessment could be simplified by assuming that all inelastic deformations would take place at the first story which performed as a soft-story with a shear governed mechanism.

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