The paper presents a proposed framework to optimize the tuned mass damper (TMD) design, useful for seismic improvement of slender masonry structures. A historical chimney located in northern Italy was considered illustrate TMD design procedure and evaluate performance system. optimization process subdivided into two fundamental phases. In first phase, main parameters were defined starting from ...

This study proposes a class of hybrid isolation systems constructed by combining Buckling Restrained Braces (BRBs) with Rubber Bearings (RBs) or Lead (LRBs) for mitigating the seismic responses in bearing-supported bridges under strong earthquakes. Firstly, two different (RB–BRB and LRB–BRB) were preliminarily designed based on energy-conservation concept case bridge Y-shaped piers, which can m...

a new approach for pole placement of nonlinear systems using state feedback and fuzzy system is proposed. we use a new online fuzzy training method to identify and to obtain a fuzzy model for the unknown nonlinear system using only the system input and output. then, we linearized this identified model at each sampling time to have an approximate linear time varying system. in order to stabilize...

Existing reinforced concrete (RC) buildings in Europe have generally been designed without proper consideration of seismic actions and capacity design principles, thus they tend to be vulnerable earthquakes. Moreover, since a significant proportion the aforementioned were developed during 1950s 1960s, are currently close end their service life. Therefore, assessment existing RC building is majo...

In the inelastic time history analyses of structures in seismic motion, part of the seismic energy that is imparted to the structure is absorbed by the inelastic structural model, and Rayleigh damping is commonly used in practice as an additional energy dissipation source. It has been acknowledged that Rayleigh damping models lack physical consistency and that, in turn, it must be carefully use...

High-fidelity modeling of nuclear reactors requires the solution of nonlinear coupled multi-physics stiff problems with widely varying time and length scales that need to be resolved correctly. A numerical method that converges the implicit nonlinear terms to a small tolerance is often referred to as nonlinearly consistent (or tightly coupled). This nonlinear consistency is still lacking in the...

Each geographical location has its own seismicity and this affects the seismic behaviour of structures. In study, four different settlements with such as İzmir, Bitlis, Samsun Konya were considered. Seismic risks parameters for these provinces compared. Analyses carried out separately a ten-storey steel building same structural characteristics in each provinces. The sample model was created by ...