This work presents an efficient approach using time-varying autoregressive with exogenous input (TVARX) model and a substructure technique to identify the instantaneous modal parameters of a linear timevarying structure and its substructures. The identified instantaneous natural frequencies can be used to identify earthquake damage to a building, including the specific floors that are damaged. ...

The primary objective is to present the most representative types of damage observed in reinforced concrete (RC) structures due earthquakes. Those damages are divided according ten types. Examples and main reasons that could trigger each failure mechanism presented. definition these supported by post-earthquake reconnaissance missions Sichuan (China) 2008, L’Aquila (Italy) 2009, Lorca (Spain) 2...

It is conventional to assume that the role of soil-structure interaction (SSI) beneficial buildings under seismic loading. However, lessons learned from recent earthquakes revealed this assumption could be misleading, and SSI may have different effects on response structural systems. In study, an enhanced numerical model developed verified using ABAQUS software assess impact high-rise frame-cor...

The influence of chained masonry walls, which represents a special case infill without gap, on the seismic response reinforced concrete buildings is extremely important due to their wide use in this type building. We can consider period building as key parameter study influence. In article, we had carried out comparative several 2D models multi-storey with brick wall using spectrum method ETABS...

As has happened in various cases of earthquakes, the impact caused by each earthquake event varies, because shaking that occurs on ground is not only influenced distance and strength earthquake, but also local soil conditions which are related to amplification phenomenon. waves type thickness soil/sediment layer above bedrock. Reinforced concrete storey buildings designed withstand both vertica...

our aim in this paper is to introduce the notion of fuzzy soft near-subtraction semigroupsand fuzzy soft ideals of near-subtraction semigroups. we discuss some important properties of these new fuzzy algebraic structure and investigate some examples and counter examples.