✦ LIBER ✦

Dynamics of seismic impacts in base-isolated buildings

✍ Scribed by Malhotra, Praveen K.

Publisher: John Wiley and Sons
Year: 1997
Tongue: English
Weight: 252 KB
Volume: 26
Category: Article
ISSN: 0098-8847
DOI: 10.1002/(sici)1096-9845(199708)26:8<797::aid-eqe677>3.0.co;2-6

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✦ Synopsis

A systematic study is made of the effects of seismic impacts between the base of an isolated building and the surrounding retaining wall. The analysis is performed without using gap elements or assuming values of the coefficient of restitution and the duration of impact. The analysis captures the effects of wave travel along the height of the building and of the associated energy loss. It poses no numerical difficulties. Results show that for elastic systems the base shear generated by impacts can be higher than the weight of the building; base shear increases with increase in the stiffness of the retaining wall, stiffness of the building and the mass of the base mat. A significant fraction of the initial kinetic energy of the system is lost by impacts; energy loss increases with increase in the stiffness of the retaining wall, system damping and mass of the base mat.

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