This study proposes two fuzzy logic controllers (FLCs) for operating control force of piezoelectric friction dampers used for seismic protection of base-isolated buildings against various types of earthquake excitations. The first controller employs a hierarchic control strategy in which a higher-level supervisory controller operates a single sub-level FLC by modifying its input normalization f...

The pre-mutagenic oxidative DNA base damage of 8-hydroxy-guanine is present in DNA isolated from cells and the amount present increases with exposure of cells to oxidative stress. The oxidative DNA base damage may be present before isolation of DNA or it may be produced during isolation and processing of DNA. We have found that the amount of oxidative base damage measured in DNA can be reduced ...

A base-isolated building may sometimes exhibit an undesirable large response to a long-duration, long-period earthquake ground motion and a connected building system without base-isolation may show a large response to a near-fault (rather high-frequency) earthquake ground motion. To overcome both deficiencies, a new hybrid control system of base-isolation and building-connection is proposed and...

Recent experimental research has shown that ordinary unbounded steel reinforced elastomeric bearings (SREBs) can be considered as an attractive cost-effective option for the seismic isolation of highway bridges. To further investigate its benefits, the current study is focused on the seismic risk assessment of an optimally designed highway bridge isolated by SREB system. A typical three-span hi...

Link beam and sliding plates is used to isolate structure against lateral base shear of the foundation due earthquake forces, link element made from steel wide flange act as a metallic damper, combined with become isolation. Analysis Etabs program results in significant differences internal moment, axial forces between structures that using isolation those without, well for drift deformation st...

This paper analyzes and compares the responses of a two-storied steel structure to 1994 Northridge earthquake in California. Response modal nonlinear time-history dynamic analysis was especially used on with fixed-base base-isolated systems show realistic behavior structure. Intuitively, best choice for seismic isolation technique is use flexible element, or an isolator, at structure’s base, wh...